4.b Staff Report DA 444 Cedar Street,Suite 1500
Saint Paul,MN 55101-2140
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MEMORANDUM
To: City Council Reference: Bracht Bros., Inc - Conditional Use
Planning Commission Permit Application for a Mining and
Anne Hurlburt, Administrator Processing Operation
Copies To: Proj. No.: 13812.009
From: Sherri Buss, R.L.A. Routing:
Date: May 2, 2008
SUBJECT: Bracht Bros., Inc. - Conditional Use Permit Application for a Mining and
Processing Operation
MEETING DATE: May 6, 2008
LOCATION: All that part of the south half of the Northwest Quarter of Section 35,
Township 32, Range 20, Washington County, Minnesota
APPLICANT: Bracht Bros., Inc.
Mr 8303 216th Street North
Forest Lake, MN 55025
120-DAY PERIOD: June 12, 2008
ZONING: Agricultural District
ITEMS REVIEWED: Application, Plans
BRIEF DESCRIPTION OF THE REQUEST:
The Application is for a new Conditional Use Permit (CUP) for an existing sand and gravel mining operation
located on 185th St. North in Scandia. Mining at the site predates any type of permitting. The site has been
issued five-year permits by Washington County since 1991, when the County exercised land use authority
within New Scandia Township. The Applicant proposes no change in the extent of mining and operations
from those approved in the previous County permit.
Site Operations
The site is 40 acres in size. The mining permit is requested for approximately 25 of these acres. The mining
operations include extraction of sand and gravel with loaders. The material is crushed on-site using a
iiiortable crusher that is periodically brought to the site when needed. A wash plant, including conveyors,
reens and a supply well, is also located on the site, in the lower portion of the mine floor. Washing with
water removes the fine particles associated with the sand and gravel. The water source is a well on the site,
An Employee Owned Company Promoting Affirmative Action and Equal Opportunity
Scandia Planning Commission Page 2 l'vray 2, 2008
Bracht Bros, Inc., CUP for Mining
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and the Applicant obtains a Minnesota DNR Water Appropriations Permit annually for the well. After use in
the wash plant, the water is discharged to sedimentation basins. After settling, the water is recycled back to
the wash plant. The applicant indicates that recycled water is used for approximately 80 percent of the wash
plant operation. The sedimentation basins are dredged periodically, and the dredged material is used in site
reclamation.
The site produces approximately 15,000 cubic yards of sand and gravel per year.
The application indicates that the lowest mining elevation will be 920 ft. above sea level, and that this is 10
feet or more above the ground water elevation on the site. The existing drainage pattern retains the surface
water run-off on the site. Storm water runoff collects in the sedimentation ponds and at the lower portions of
the mine floor. The Applicant indicates that the same drainage pattern would be retained after reclamation,
with all runoff remaining within the site.
The site has some existing belins and vegetation areas around the mining operations area. No additional
screening is proposed.
Mining has been conducted in three phases, approximately the north 1/3, the south 1/3 and the central 1/3 of
the site, in that order. Mining is complete in the phase 1 area, and some of area has been reclaimed. A
portion of the phase 1 area is occupied by a sedimentation pond. The Applicant estimates that mining will
continue in the phase 2 area for an additional 1 to 3 years. Half of the phase 2 area has been backfilled.
When mining is complete in the phase 2 area, mining activities will move to the phase 3 area. The eastern •
part of the phase 2 area will be backfilled as mining begins in the phase 3 area. Processing operations will
remain in the center of the site in phase 3.
The Applicant estimates that 10-15 years of mining activity remain at the site, depending on market demand.
The Applicant notes that there is no blasting at this site.
Reclamation Plan
The proposed reclamation plan includes backfilling to create slopes up to a maximum 4:1 gradient, adding
topsoil, seeding, and mulching. The reclamation will leave a deep bowl in the mined portions of the site,
visible in the cross-sections provided by the Applicant.
EVALUATION OF THE REQUEST
The Applicant is requesting a Conditional Use Permit for a mining operation. The use is governed by the
City's Ordinance No. 103, Mining and Related Activities Regulations. This review evaluates the request for
a CUP based on the City's Ordinance and the materials submitted by the Applicant.
Groundwater-Related Issues
Leggette, Brashears and Graham, Inc. (LBG) conducted an initial review of CUP Application and related
III
information in March 2008. From this review process, LBG identified specific portions of the CUP
Application that required additional information and/or clarification on ground-water related issues. LBG
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Bracht Bros, Inc., CUP for Mining
prepared a series of questions that outlined these data gaps, which were submitted to Sunde Engineering
through TKDA. Sunde responded in writing on April 15, 2008. LBG has reviewed this recent information
and found that it sufficiently addressed the questions with the exception of the items identified in the LBG
letter dated 4/28/08. Sunde will be required to provide the items identified in order for the City to issue a
Conditional Use Permit for the Bracht Mining Operation.
Key Groundwater-Related Issues:
1) Ground-Water Elevations and Flow Direction: Observation wells have not been installed in the
water table aquifer at the site. As a result, depth to the water table surface and the direction of
ground-water flow in this aquifer was estimated by Sunde from on-site soil boring logs and
information provided in the Washington County Geologic Atlas (Atlas) (Figure 2). Depth to ground-
water and grade elevations noted on the boring logs from 1989 indicates the ground-water elevation
decreases from 915 feet above mean sea level (amsl) on the west side of the site to 905 feet amsl on
the east side. Although the borings were drilled in a line which is not ideal for determining ground-
water flow direction, the general west to east flow direction agrees with the data provided in the
Atlas. LBG concurs with the information presented in the CUP Application that the horizontal flow
component of the water table aquifer is generally from west to east across the site.
Ground-water levels in a shallow, water table aquifer can vary significantly over time because of
changes in precipitation and recharge. Frequent monitoring of water levels and comparison to
I precipitation records should be required as part of the Annual Operating Permit to establish seasonal
variations and long-term trends.
2) Hydraulic Connection - Sand and Gravel and Bedrock Aquifers: Determining the hydraulic
connection between different aquifers requires review of quality geologic logs, and collection and
evaluation of ground-water level data. The boring logs from the site show the geology consists of
three units. From top to bottom these include: 1) a sand and gravel unit; 2) a clay layer; and, 3)
bedrock of the Prairie du Chien Group and Jordan Sandstone formations. The sand and gravel is the
unit being ruined and includes the water table aquifer. Based on current information, the water table
surface is below the elevation of the existing and proposed mine floor. Geologic logs from soil
borings 2 and 3 show the clay is approximately 18 feet thick and may act as a confining unit that
hydraulically separates the sand and gravel aquifer from the underling Prairie du Chien-Jordan
aquifer. The production well pumps from the Prairie du Chien-Jordan.
Historical ground-water level data from the sand and gravel aquifer and the underlying Prairie du
Chien-Jordan aquifer are currently unavailable to accurately evaluate the hydraulic connection
between these water-bearing units on site. Ground-water elevations estimated from the borings in
1989 ranged from approximately 905 to 915 amsl. (Note: Since observation wells were not
constructed in these borings, these water-level results represent a one-time measurement that cannot
be repeated or confirmed.) The hydraulic head in the Prairie du Chien-Jordan below the site was not
available until 1992 when the production well was installed. At that time depth to water was 26 feet
below grade, but no survey results were available to establish a ground-water elevation. A
4111 subsequent survey completed by Landmark Surveying, Inc. (date unknown, but data was included in
Sunde's April 15, 2008, response in Attachment 1) reported a grade elevation at the production well
Scandia Planning Commission Page 4 May 2, 2008
Bracht Bros, Inc., CUP for Mining
of approximately 939 feet amsl, which puts the ground-water elevation at approximately 913 feet
amsl. This is similar to the water-table elevation estimated from the on-site borings.
As stated in the CUP Application, the Atlas shows the hydraulic head of the Prairie du Chien-Jordan
aquifer at approximately 880 to 890 feet amsl, which is approximately 25 feet below the estimated
head in the sand and gravel aquifer. These results suggest the two aquifers may not be connected
(Figure 2).
Considering the lack of historical water elevation data from the sand and gravel aquifer, and
conflicting results shown by the Atlas and site-specific data, it cannot be determined at this time if the
two aquifers are connected. If the production well is to be used for monitoring water table
conditions, this condition must be addressed.
The production well is completed in the Prairie du Chien-Jordan aquifer, which may not be
hydraulically connected to the sand and gravel aquifer that underlies the site. In addition, the portion
of the production well (59 to 75 feet below grade) that is open to the bedrock aquifer is below water
table surface. Monitoring below the water table may not provide accurate information.
Ground water will be increasingly vulnerable as the depth of the excavation increases. In addition, if
at any location in the mine the clay unit is absent, then the Prairie du Chien-Jordan aquifer will also
become increasingly vulnerable. This is simply due to the vertical proximity of the mine base and the
water-table or Prairie du Chien aquifer systems.
3) Additional Monitoring Needs: The CUP Application states that a diesel range organics (DRO) test
monitors for contamination from diesel fuel and other petroleum based products. Although this is
correct, DRO does not identify the full gasoline range organics (GRO) spectrum. If gasoline is to be
used on site, then GRO, and potentially benzene, should be added to the list of analytical methods.
Groundwater-Related Recommendations
Given the general comments above and from LBG's review of the CUP Application and subsequent
information provided by Sunde on behalf of the Applicant, LBG recommends the following conditions be
include in the CUP for this site:
1) LBG recommends that the production well not be used to meet the monitoring well requirements
outlined in the CUP Application. LBG recommends that Bracht install a monitoring well that is
adjacent to the production well and screened in the upper part of sand and gravel aquifer,
approximately 10 feet below the top of the water table. The purpose of this well is to measure the
depth to water in this uppermost water-bearing unit. Comparing water-level data from this well with
the production well will also help determine the hydraulic connection between this aquifer and
underlying the Prairie du Chien-Jordan aquifer.
2) LBG recommends that Bracht document when the wash plant operates to better identify when the
production well is pumping. This information is necessary when evaluating water level data.
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Bracht Bros, Inc., CUP for Mining
41/3) In addition to the shallow observation well proposed near the production well, the CUP Application
requires not less than one downgradient monitoring well be installed (Section II P). Therefore, this
well should be placed along the east property line of the site and downgradient of fuel tanks. This
well and the monitoring well proposed in number 2 above will also be useful to establish the
hydraulic gradient or slope of the water table aquifer across the site.
4) Water-level measurements should be collected monthly for the first year and quarterly thereafter to
evaluate seasonal variation in water elevation and potential hydraulic connection between the drift
and Prairie du Chien aquifers.
5) LBG agrees that ground-water samples should be analyzed for DRO. However, if gasoline is to be
used on site, then GRO, and potentially benzene, should be added to the list of analytical methods.
6) A door-to-door survey should be conducted to confirm "assumed well" locations shown on Figure 2.
This is requested in Section F of the CUP application on page 3.
Watershed District Review of Surface and Ground Water Issues
The Carnelian-Marine-St. Croix Watershed District (CMSCWD) Engineers have recommended that the
District Managers approve a Permit for Bracht Brothers Mining Operation, and authorized the District
Administrator to issue permit contingent on Applicant addressing the comments of District Engineer.
41°The Applicant will be required to obtain a permit from the CMSCWD before the City will issue the CUP for
the Mining Operation.
Traffic
The entrances to the mining site are off 185th Street. From information provided by the applicant, the
maximum traffic count is 50 trucks per day. Data from the past 17 years shows the actual average truck
traffic has been lower at approximately 11 trucks per day. An additional two to four trips per day are
expected from employees. The majority (95%) of this traffic will be oriented to and from the west on 185th
Street toward County State-Aid Highway (CSAH) 3.
185th Street is a two-lane, gravel roadway. A 'trucks hauling' sign is posted to the west of the site on 185th
Street. The roadway also has warning signs posted for children and a supplemental speed of 30 mph. At the
intersection with CSAH 3, where most traffic is headed, right turn lanes are currently provided for each
approach on CSAH 3. The existing average annual daily traffic (AADT) volume is 2,050 vehicles per day
on CSAH 3 and estimated to be much lower on 185th Street. A review of reported crashes showed only
property damage crashes with animals.
Given the low volume estimated on 185th Street, the relatively low volume on CSAH 3, and the relatively
low volume to and from the site, roadway changes, such as turn lanes, are not recommended at this time.
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Bracht Bros, Inc., CUP for Mining
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Recommendations
• Another `truck hauling' sign should be added for the westbound approach to the east of the site.
Supplemental signing below these new sign and the existing sign should also be added detailing the
approximate number of feet until the first driveway.
• As the truck traffic is likely the major source of traffic on the gravel road, dust control by the
applicant is recommended.
• Without lighting in the area and given the number of residences surrounding the site, hours of
operation are also important to maintain safety. Restricting trucks to daylight hours, one hour before
sunrise and one hour after sunset, or some other type of daytime limit, would provide benefits to
traffic safety as well as overnight traffic noise.
• Restriction of trucks to and from CSAH 3 is also recommended. This limits the impact of the truck
traffic on local roadways. The County roadways are designed to handle the truck traffic. Although
the applicant has stated that not much traffic is expected to and from the east toward Old Marine
Trail, this would formalize the restriction. To preclude trucks using another local gravel roadway, the
restriction should also include 177th Street.
• Finally, by signage or some other method, the applicant should remind truckers of the low speed
expected on 185th Street. The supplemental speed signs on the local road list 30 mph. Although the •
applicant cannot be held responsible for the individual speed of trucks, a reminder through a sign by
the gate as trucks exit the site may help keep speeds low.
Reclamation Plan
The Scandia Mining Ordinance requires mining operators to provide a reclamation plan as part of their
Conditional Use Permit Application (Chapter 4, Section 8). The plan must include graphic representation and
written text. The Ordinance defines Reclamation, Restoration, Rehabilitation as follows: "To renew land to
include re-establishment of vegetation, soil stability and establishment of safe conditions appropriate to the
intended use of the land in accordance with the City's Comprehensive Plan and Conditional Use Permit
conditions allowing for excavation and/or processing on the site."
The ordinance further defines elements that must he present in the plan (intent of reclamation or final use,
phasing and timing of reclamation, final condition of the site, etc.) timing concurrent with mining operation,
requirements for grading and filling including final slopes, drainage, cover and planting, topsoil and removal
of structures. If a mining operation will result in "accumulation of substantial water areas after reclamation"
additional requirements such as water depths, grades above land as well as bottoms of water bodies are
identified.
In order to assure that the conditions of the reclamation plan are being addressed, renewal of the Annual
Operators Permit (AOP) will in part depend on progress toward reclamation made on a yearly basis. To
ensure that reclamation does occur in accordance with the approved plan, "the applicants are required to
Scandia Planning Commission Page 7 May 2, 2008
Bracht Bros, Inc., CUP for Mining
provide to the City an Irrevocable Letter of Credit or other security satisfactory to the City in the amount
determined by the City." (Chapter 4 Section 9.3)
The Bracht Mining Site is designated as General Rural - Agriculture Area in the Scandia Comprehensive
Plan. The Plan states: "The General Rural/Agriculture Area is envisioned as an area that will remain
sparsely developed over the next 25 years." The Scandia Zoning Ordinance designates the Bracht mining
area as A-4 Agriculture. The two primary land uses in A-4 districts are Agriculture and Single Family
Residential. Agricultural Use is defined as "Land whose use is devoted to the production of horticulture and
nursery stock, fruit of all kinds, vegetables, forage, grains, bees and apiary products and raising domestic
farm animals."The overall density of residential units is limited to four units per 40 acres. The range of
potential final uses is limited to agriculture (includes open space) and single family residential at a density no
greater than 4 units per 40 acres. If clustering (under the Open Space Conservation Subdivision provisions
of the Zoning Ordinance) is proposed, a landowner may increase density slightly provided certain conditions
are met.
Evaluation of the Proposed Bracht Reclamation Plan
The Bracht CUP mining application includes the following documents:
1) Conditional Use Permit Application for a Mining and Processing Operation, Section R, Reclamation
Plan in Conformance with Section 8
.2) Cl Site Plan (dated 4/10/08)
3) C3 Reclamation Plan (dated 4/15/08)
4) C3-A Restoration and Phasing Plan (dated 4/15/08)
5) C7 Concept Ultimate Use Plan (dated 4/7/08)
The Bracht reclamation plan submitted as part of the CUP application addresses the ten points listed in the
ordinance (Section 8.1) in text and graphic materials. The reclamation plan states the purpose of reclamation
activities is to "restore the site to a stable condition, minimize the potential for erosion and allow for future
development of the site." The plan with revisions on updated plans describes the methods and process of
reclamation, including prescribed seed mixtures for long-term soil/slope stabilization. It addresses phasing
and timing of operations and reclamation, and shows final condition of the site. It includes a detailed
description of the reclamation costs, which are estimated at $63,914 in 2008 dollars.
The ordinance states that reclamation is to proceed concurrently and proportional to actual mining
operations. The plan does propose a mining schedule, although since nearly the entire mining area has been
opened up, the reclamation plan will need to proceed on a timed basis.
The ordinance lays out requirements for excavations resulting in the accumulation of substantial water areas
siefter reclamation. The text does state that "the site will drain internally with ponding areas located within the
claimed areas." The final reclamation plan does not show where these ponds will be, although they will
likely be in the low spots on the contours. The applicant must refine the extent and location of these
Scandia Planning Commission Page 8 May 2, 2008
Bracht Bros, Inc., CUP for Mining
1111
proposed ponding areas. The reclamation plan states that all excavation areas will not get closer than 10 feet
to the groundwater (910 feet above mean sea level). Thus final grades will not be lower than 920 feet.
Section 8.4 of the Mining Ordinance lays out requirements for areas which must be graded or backfilled for
final reclamation. The reclamation plan states that all overburden and topsoil needed to reclaim the parcel is
available on site. A soil balance was prepared for Washington County, but that has not been provided to the
City.
Since the applicant is not proposing to import topsoil or overburden, no inspections of either will be required.
Since there is reference to ponding areas, there could be stagnant water. This must be addressed. The area is
to be contoured to a gently rolling topography. The plan states that the maximum slopes will be 4:1, and if
sufficient material is left over, the slopes will be reduced. The ordinance states (8.4(6)) "such topsoil shall be
planted with trees, shrubs, legumes or grasses." The reclamation plan only proposes grasses, even though
the already reclaimed areas have grasses and scattered trees.
The final elevations planned for building purposes must not be less than 10 feet above the normal ordinary
groundwater level. Plans for on-site septic systems must be considered in these proposed elevations.
Since most drainage from the site will remain on the site, it is not expected that there will be any adverse
effects to public roads or neighboring uses. However, some areas outside the mining limits will be graded.
Special care will be needed for grading outside the mining limits. Depending on where this occurs, it could ill
limit locations for future residential uses.
Section 8.7 of the Mining Ordinance addresses Topsoil. It prescribes the set aside of topsoil and overburden
to minimize wind and water erosion. The reclamation plan states: "Consistent with the mining plan
developed for this site for the County permits, the majority of restoration fill for the final restoration phase
will come from the area east of the approved mining limits. As part of the County pei miffing process, soil
balance computations were submitted and the area was reserved for use not as mining but as a source of
restoration materials to ensure that sufficient restoration material would remain on the site."
Section 8.8 of the Mining Ordinance addresses Structures. There are no permanent structures on the site.
The plan does show equipment to be removed as part of final reclamation.
Issues/Recommendations for Reclamation
• The ultimate use concept plan shows four lots coming off a cul-de-sac that points west from a
north/south road. The text of the reclamation plan states "this plan is conceptual only. Future
development of the site will require formal review and platting by the appropriate governing
agencies." The City of Scandia, by approving a reclamation plan, makes no promises or
commitments relative to the concept plan. However, based on the concept plan, the City will expect
the planned end use to be residential housing. The maximum number of residential units under
current zoning is four units. The operator must make sure there are adequate areas for house pads
and either on-site septic systems or a communal system. (The concept shows a joint sewer system.)
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Bracht Bros, Inc., CUP for Mining
•
• The reclamation plan states that no slopes will exceed 4:1, and depending upon the available
overburden and topsoil remaining, the slopes will be less. The final slopes on this site cannot exceed
4:1.
• The reclamation plan states a soil balance was prepared for this site. That infoiination should be
provided to the City.
• No overburden or topsoil can be removed from this site, since the City would prefer final slopes less
than 4:1.
• The process for stabilizing the soil must use prescribed methods and seed mixtures as per the most
current Mn/DOT Native Seeding Manual guidelines, as stated in the reclamation plan.
• The separation between lowest final grades and groundwater cannot be closer than 10 feet. Since the
Reclamation Plan acknowledges there will be ponding areas, they should be identified and the issue
of stagnant water addressed. The ordinance calls for a combination of trees, shrubs, legumes and
grasses. The reclamation plan only calls for grasses. Some of the areas already reclaimed include
scattered trees. Today most of Scandia is a mixture of grasses, scattered trees and woodlands. In
order to restore the area into the surrounding landscape, some native trees should be included in the
reclamation/restoration plans. Language relative to final grades on Figure C3 should be revised: if
110 fill is available the final grades may be "reduced".
Staging:
The reclamation plan states the anticipated life expectancy of the site is 10-15 years, depending on demand.
The most recent Restoration and Phasing Plan is illustrated and explained on Figure C3-A dated April 15,
2008. This plan addresses phasing, although not timing of restoration. Visual inspection of the site indicates
that there is need for catch up on some of the restoration activities. For this reason, the City recommends the
following schedule for initial restoration phases, which will be enforced through the AOP process:
• Phase 1 of future restoration activities will be establishing vegetation over this sloped and backfilled
area (southwest corner, western half of mining phase 2). This should be accomplished in the 2008
season.
• Phase 2 will be the completion of backfilling and sloping of the southeastern portion of the site (east
half of mining phase 2) followed by establishment of vegetation. This should be accomplished in the
2009 season.
• Phase 3 reclamation will involve sloping and backfilling the very western portion of the phase,
followed by establishment of vegetation. This should be accomplished not later than the 2012
season, unless mining has not progressed as reported in the Annual Operating Permit application.
• Final Reclamation Phase will require removal of all equipment, backfilling and grading in the
• northwest, northeast and eastern portions of the site. This will be followed by establishment of
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Bracht Bros, Inc., CUP for Mining
vegetation, including grasses and trees. This should be accomplished not later than the 2018 season,
unless mining has not progressed as reported in the Annual Operating Permit application.
• It is expected that the reclamation process will proceed concurrently and proportional to actual
mining operations. Progress on concurrent reclamation as demonstrated in the AOP application, may
allow reductions in portions of the Letter of Credit for Reclamation on a five-year basis.
• Section 9.3 of the Mining Ordinance provides for a financial guarantee to the City to assure
compliance with the Reclamation Plan. The guarantee can take the form of a Letter of Credit or other
security satisfactory to the City in the amount determined by the City. The applicant has provided a
detailed cost estimate for reclamation, based on the original reclamation plan submitted. This
estimate of$63,914 (in 2008 dollars) should be verified by the applicant in light of the revised
reclamation plan reviewed here. Assuming a 15 year life span, and an annual inflation rate of 3
percent, ultimate reclamation costs in 15 years would be $97,000. The Mining Ordinance does state
that "the operator shall be entitled to a reduction in the security amount on a dollar for dollar basis as
reclamation is completed and approved by the City engineer, except that the security shall not be
reduced below an amount equal to 125 percent of the cost of the work to be completed as determined
by the City Engineer nor below 5 percent of the security, unless the reclamation has been accepted by
the City."
• The Applicant must demonstrate that there is sufficient material on the site to complete the
reclamation efforts. The City may increase the required financial guarantee if additional material 411
needs to be imported to the site to complete the proposed reclamation.
• The applicant must address these issues, and prepare a final, separate reclamation plan based upon
these recommendations. That final reclamation plan, which will require approval by the City, will
form the basis of future Annual Operating Permit approvals. This Reclamation Plan shall be updated
every five years.
Screening, Berming and Related Site Issues
The updated site plan (Sheet C-1) provided by the applicant indicates the existing fencing that surrounds the
site, and existing burning and plantings. No additional screening and berming will be required for approval
of the CUP.
The Reclamation Plan (Sheet C-3) has been revised to include the proposed seed mixes and maintenance for
reclamation areas. These are appropriate and acceptable.
Field visits to other mining sites revealed that reclamation efforts on some sites have experienced significant
erosion on planted areas that has compromised the success of the reclamation efforts. It is recommended that
erosion control fabrics or other geotextiles be incorporated as needed in reclamation areas to prevent erosion.
Reclamation efforts will be monitored by the City, and where erosion issues are identified, the Applicant will
be required to use appropriate methods to control erosion and assure the success of reclamation efforts.
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Scandia Planning Commission Page 1 I May 2, 2008
Bracht Bros, Inc., CUP for Mining
11111PLANNING STAFF RECOMMENDATIONS:
The proposed plans and supporting materials provided by Bracht Brothers, Inc., meet the requirements of the
City's Code for issuing a Conditional Use Permit. The Planner recommends approval of the request for
the Conditional Use Permit, with the following conditions:
1. The Applicant must comply with all rules and regulations of Federal, State, County, and local
agencies, and maintain compliance with all pen-nits granted by these agencies for operations on the
site (ongoing).
2. The Applicant must receive a Stormwater Pen-nit from Carnelian-Marine-St. Croix Watershed
District (within 90 days of approval of the CUP).
3. The Applicant should provide information on existing ground elevations in bottom of pit on the plan
sheet (within 60 days of approval of the CUP).
4. The hours of operation shall conform to the City's Ordinance and the following: hauling shall be
conducted only between 7 a.m. and 7 p.m., Monday through Friday, during daylight hours, or one
hour before sunrise and one hour after sunset during seasons when daylight is not available from
7 a.m. to 7 p.m. (ongoing).
105 The Applicant shall install a monitoring well that is adjacent to the production well and screened in
the upper part of sand and gravel aquifer, approximately ten (10) feet below the top of the water
table. The purpose of this well is to measure the depth to water in this uppermost water-bearing unit
(within 60 days of approval of the CUP).
6. The Applicant shall install at least one downgradient monitoring well, as described by LBG. This
well should be placed along the east property line of the site and downgradient of fuel tanks. This
well and the monitoring well proposed in number 5 above will also be useful to establish the
hydraulic gradient or slope of the water table aquifer across the site (within 60 days of approval of the
CUP).
7. The monitoring plan shall specify that ground-water samples shall be analyzed for DRO. If gasoline
is to be used on site, then GRO, and potentially benzene, should be added to the list of analytical
methods. (Monitoring plan to be completed within 60 days of approval of the CUP, and monitoring to
be ongoing).
8. The Applicant shall provide a final, corrected copy of the Application materials and plan sheets to the
City (within 60 days of approval of the CUP).
9. The applicant must prepare a final, complete reclamation plan based upon the recommendations
included in this review (within 60 days of approval of the CUP). That final reclamation plan, which
will be approved by the City, will form part of the basis for approval of the Annual Operating Permit.
This Reclamation Plan shall be updated every five years.
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Bracht Bros, Inc., CUP for Mining
•
10. The revised plans shall indicate that the lowest final grade for mining and reclamation activities must
be at least ten (10) feet above the highest groundwater elevation (ongoing).
11. The Applicant shall establish a permanent benchmark on the site to allow for ongoing monitoring of
elevations by the City (within 60 days of approval of the CUP).
12. The Applicant must obtain an Annual Operating Permit from the City. (Application to be completed
within 60 days of approval of the CUP, and annually).
13. The Applicant shall comply with all other requirements of the City's Ordinance No. 103 (ongoing).
The following additional conditions shall be addressed in the application for an Annual Operating
Permit for the Mining and Processing Operation:
1. The Applicant shall prevent trucks from using Old Marine Trail and 177th Street.
2. The applicant shall provide signs and verbal reminders to inform truckers of the low speed (30 mph)
expected on 185th Street.
3. The Applicant should provide field delineation and report for the two wetlands adjacent to the pit.
The Applicant should maintain an undisturbed buffer area of at least 50-ft from these wetlands until
wetlands are delineated and potential impacts and requirements are deteimined. (Note: the
delineation requirement can be included as a permit stipulation to be completed in Spring, 2008). •
4. Another 'truck hauling' sign should be added for the westbound approach to the east of the site.
Supplemental signing below these new sign and the existing sign should also be added detailing the
approximate number of feet until the first driveway.
5. The Applicant shall prepare a dust control plan as required in the City's Ordinance. The Applicant
shall be required to provide dust control on gravel roads that are used for hauling, or provide an
escrow to the City to provide at least two dust control treatments per year. The City may require the
Applicant to pay the cost of additional treatments if needed to provide adequate dust control.
6. The Applicant shall document when the wash plant operates to better identify when the production
well is pumping.
7. Water-level measurements shall be collected monthly for the first year and quarterly thereafter to
evaluate seasonal variation in water elevation and potential hydraulic connection between the drift
and Prairie du Chien aquifers.
8. The Applicant shall incorporate erosion control fabrics, other geotextiles, or methods as needed in
reclamation areas to prevent erosion. Reclamation efforts will be monitored by the City, and where
erosion issues are identified, the Applicant will be required to use appropriate methods to control
erosion and assure the success of reclamation efforts. Bioengineering methods to control erosion that
result in a relatively natural site appears should be utilized.
Scandia Planning Commission Page 13 May 2, 2008
Bracht Bros, Inc., CUP for Mining
ACTION REQUESTED:
The Planning Commission can:
I. Recommend approval as written;
2. Modify and recommend approval
3. Recommend denial if it is found that the request is not consistent with the Comprehensive Plan, CUP
Criteria, and Mining Ordinance, and is not in the best interest of the community;
4. Table the request
Staff request that the Planning Commission review this report and the conditions identified for the CUP and
AOP, and that the Commission provide recommendations to the Council regarding this Application.
•
•
LEGGETTE, BRASHEARS & GRAHAM, INC.
PROFESSIONAL GROUND-WATER AND
ENVIRONMENTAL ENGINEERING SERVICES
8 PINE TREE DRIVE
SUITE 250
ST.PAUL,MN 55112
(651)490-1405
FAX(651)490-1006
lb!.! hcoiii
April 28, 2008
Ms. Sherri Buss, R.L.A.
Senior Planner/Landscape Architect
TKDA
1500 Piper Jaffray Plaza
444 Cedar Street
St. Paul, MN 55101-2140
Re: Hydrogeologic Evaluation
Aggregate Mining and Processing Operation
Bracht Bros., Inc.
City of Scandia, Minnesota
•
Dear Ms. Buss:
Leggette, Brashears & Graham, Inc. (LBG) was retained by TKDA to review the Bracht
Bros., Inc. (Bracht) Conditional Use Permit (CUP) Application for the purpose of identifying
data gaps and any potential ground-water issues that could result from current and proposed
mining activities. The information provided below provides TKDA and the City of Scandia
(City), Minnesota with LBG's comments and recommendations. The CUP Application, dated
November 2007, was prepared by Sunde Engineering, PLLC (Sunde) on behalf of Bracht for the
aggregate mining and processing operation (site) located on 1851h St. in the City. The location of
the site is shown on Figure I.
LBG conducted an initial review of CUP Application and related information in March 2008.
From this review process, LBG identified specific portions of the CUP Application that required
additional information and/or clarification on ground-water related issues. LBG prepared a series
of questions that outlined these data gaps, which were submitted to Sunde through TKDA. At
the time of our initial review, the information that was either missing or incomplete included: soil
boring logs and survey data; a hydrogeologic cross section; historical ground-water level data;
and, the water appropriation permit number for the on-site production well. Sunde responded in
writing on April 15, 2008. LBG has reviewed this recent information and found that it
sufficiently addresses our questions with the exception of the items presented in the general
comments section below. Attachment 1 includes Sunde's responses to our questions and the
supplemental information provided.
CONNEC-1!CUT•OHIO•ILLINOIS•SOUTH DAKOTA•PE\NSYLVANIA•FLORIDA•NEW JERSEY•TEXAS
\1ISCONSIN•NEW YORK•MISSOURI•VI RMONT•MICHIGAN
Ms. Sherri Buss 2 April 28, 2008
• General Comments
1) Sunde Responses to LBG Questions: The supplemental information provided by
Sunde (see Attachment 1) in response to LBG's questions should be included in the
CUP Application.
2) Section II - Figure 1 through 4: Sunde should include a scale bar on each map.
3) Section II - Figure 4: Sunde should include road names for reference.
4) Section II G - Figure C-1: Sunde should omit the two extra 105 contour lines on the
east side of the map.
5) Section II 9 G - Figures C-4 through C-7: Sunde should revise cross section A-A'
through D-D' to include tie lines (i.e. notes that show where cross sections intersect).
A note should be provided on each cross section indicating the water table surface was
estimated from borings drilled in 1989.
6) Section II 9 G - Figure C-7: Sunde should revise the "west" and "east" designations
labeled on cross section D-D' to "north" and "south".
7) Section II 9 G - Ground-Water Elevations and Flow Direction: Observation wells
have not been installed in the water table aquifer at the site. As a result, depth to the
• water table surface and the direction of ground-water flow in this aquifer was
estimated by Sunde from on-site soil boring logs and information provided in the
Washington County Geologic Atlas (Atlas) (Figure 2). Depth to ground-water and
grade elevations noted on the boring logs from 1989 indicates the ground-water
elevation decreases from 915 feet above mean sea level (amsl) on the west side of the
site to 905 feet amsl on the east side. Although the borings were drilled in a line which
is not ideal for determining ground-water flow direction, the general west to east flow
direction agrees with the data provided in the Atlas. LBG concurs with the
information presented in the CUP Application that the horizontal flow component of
the water table aquifer is generally from west to east across the site.
Ground-water levels in a shallow, water table aquifer can vary significantly over time
because of changes in precipitation and recharge. Frequent monitoring of water levels
and comparison to precipitation records is needed to establish seasonal variations and
long-term trends.
8) Section 11 9 G - Hydraulic Connection of Sand and Gravel and Bedrock Aquifers:
Determining the hydraulic connection between different aquifers requires review of
quality geologic logs, and collection and evaluation of ground-water level data. The
boring logs from the site show the geology consists of three units. From top to bottom
these include: 1) a sand and gravel unit; 2) a clay layer; and, 3) bedrock of the Prairie
du Chien Group and Jordan Sandstone formations. The sand and gravel is the unit
being mined and includes the water table aquifer. Based on current information, the
water table surface is below the elevation of the existing and proposed mine floor.
Geologic logs from soil borings 2 and 3 show the clay is approximately 18 feet thick
and may act as a confining unit that hydraulically separates the sand and gravel aquifer
Ms. Sherriuvo 3
__ April
from the underling Prairie du Chico`)ordaoaguifec The production well pumps from
the Prairie du Chien-Jordan.
BimNhca| grnund'vm1er |evd data from the sand and gravel aquifer and the underlying
Prairie du Chien-Jordan aquifer are ounrnrh/ unavailable to accurately cvu|ua1c the
hydraulic connection between these water-bearing units on site. Ground-water
elevations estimated from the borings in 1909 ranged from approximately 905 io9|5
unoai (Note: Since ohmcnmbon *nUs were not constructed in these borings, 1hcac
water-level results represent o one-time rncaournoen< that cannot be repeated or
confirmed.) The hydraulic head in the Prairie du Chien-Jordan below the site was not
available until 1992 when the production well was installed. At that time depth to
water was20 feetbelow grade, but no survey results were available to establish' o
ground-water elevation. /\ subsequent survey completed by Landmark Surveying,
Inc, (date unknown, but data was included in Sundo`m &o/i| 15, 2008 rcupnuoc in
Attachment |) reported u grade elevation ct the production ` Uofupprozinootely 939
feet ummi which puts the ground-water elevation u{ approximately 9|3 feet xrnoi This
in similar to the water-table elevation cxhmn*xd from the on-site borings.
As stated in the CUP Application, the Atlas shows the hydraulic head of the Prairie du
Chien-Jordan aquifer at approximately 880 to 890 feet urna|, which is approximately
25 feet below the estimated head in the sand and gravel aquifer. These results suggest
the two aquifers may not bc connected (Figure 2).
Considering the lack of historical vvu1er elevation data from the sand and gravel
aquifer, and conflicting results shown by the Atlas and oite'xpeoificduta. it cannot be
determined u| this time if the two aquifers are connected, |f the production well and is
to be used for monitoring water table conditions, this condition must be addressed.
9) Section lK 9 P: The production well is completed in the Prairie du Chien-Jordan
aquifer, which may not be hydraulically connected to the xuud and gravel aquifer that
underlies the site. In addition, the portion o[the production well (590o 75 feet below
grade) that is open to the bedrock aquifer is below v/o{cr table surface. Monitoring
below the water table may not provide accurate information.
lO) Section 119 P: The CUP Application states that udienc\ range organics (DBO> 1og
monitors for contamination from dieselfuel and other petroleum ha � p 'udx.
Although this iscorneo+ DR0 does not identify �hc full gasoline mn8cor�uoz a (3B0)
spectrum. If gasoline is \obcstored on site, then GQOund benzene should 6cadded
(o the list of analytical methods.
| |) Section 111 7: Ground water will be increasingly vulnerable as the depth of the
n czcuvutin mcuosno. In addition, if at any location in the ndoe the clay unit is absent,
Uxn the Prairie du Chien-Jordan aquifer will also hcoomc increasingly vulnerable.
This m simply due W the vertical proximity of the mine bumo and the omicptoh|cor
Prairie du Chien aquifer systems.
' Ms. Sherri Buss 4 April28, 200Q
Recommendations
Given the general con000cutx above and from our review of the CUP &py|icudoo and
subsequent information provided by8undn, LBG recommends the following for this site.
|) LBG recommends that the production well not be used to noot the monitoring well
requirements outlined in the CUP Application. LB(] recommends that B,ucbt install a
monitoring well that is adjacent to the production well and screened in the upper part of
sand and gravel aquifer. The purpose of this well intn measure the depth to water in
this uppermost water-bearing unit. Comparing wntcp|evc| data from this well with the
production well will also hc\y determine the hydraulic connection between this aquifer
and underlying the Prairie du Chien-Jordan aquifer.
2) LBG recommends that Brucht document when the wash plant operates to better idenhfv
vvhcothe ynoduodoo well iopun�piog. This information is necessary when evaluating
*u\cr |cvc| data.
~
3) In addition to the shallow observation well proposed near the production well, the CUP
Application requires not |csn than one d ionU n`oo�nrix, n�U hc iu�u]bd
(8cchonDP) Therefore, Ubix °cUxhouNhcp- a\ [k ouy~ \b�o f the
, mcxo along � east property o
site and downgradient of fuel tanks. This well and the monitoring well proposedin
numbernubcr 2 above will also be useful to establish the hydraulic gradient or slope of the
wateriub� aquifer across the site.
4) Water-level nucaaurennnn/s should be collected monthly for the firm year and quarterly
{hcocoDcr to evaluate seasonal variation in water c\cvahoo and potential hydraulic
conne�/oobetween the ddDand Pruihcdu Chien uqui�ro.
5) LBG agrees that ground-water oanop|cs should be noah/zeJ Gv DRO. However, if
gasoline is to be used on site, Uhen GBO, and po\on1iaU ' heozcuc, should be added to
the anu\)telist.
6) A door-to-door survey should be conducted to confirm "assumed well" locations shown
on Figure 2. This is requested in Section Pof the CUP application on page I
7) The recommendations provided above do not include those presented in o
Memorandum hy Emn«ons & Olivier Resources (EOK), dated March 31, 2008. LBG
recommends that Brachi comply with the E0D'o Q,ound'"m\cr n:|o1cd
recommendations uowell,
Ms. Sherri Buss 5 April 28, 2008
If you have any questions concerning this review, please contact us at (651)490-1405,
•
Sincerely,
LEGGETTE, BRASHEARS & GRAHAM, INC.
David S. Hume, P.G.
Senior Associate
Reviewed by:
J. Kevin Powers, P.G.
Principal
DSH:kw
Attachments
S:\Tech\Scandia Aggregate\Bracht\Bracht CUP review(final).doc
411
FIGURES
•
•
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•
"�� �` LEGGETTE,BRASHEARS&GRAHAM,INC. BRACHT BROS.,INC.MINE
Professional Ground-Wafer and SCANDIA,MINNESOTA
qB - Environmental Engineering Services BRACHT AGGREGATE MINE LOCATION
8 Pine Tree Drive,Sure 250 CITY OF SCANDIA,MINNESOTA
St-Paul,Minnesota 55112
(651)440-1405 FILE: G3SCAND01D.MXD DATE:
1 04/28/2008 i FIGURE: 1
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ATTACHMENT 1
SUNDE RESPONSE TO LBG DATA REQUEST
•
•
LEGGETTE, BRASHEARS & GRAHAM, INC.
• Here is the summary of questions for the three Scandia mine sites. This summary focuses on
data that is missing and required for us to complete our evaluation. Other LBG comments and
proposed contingencies/recommendations pertaining to each CUP will be provided at a later
date.
Brecht
1) Are there survey data for the 3 borings(Le.,grade elevation at the boring location
when it was drilled)? If so,please provide. This will help determine/verify the
accuracy of the groundwater elevations used to estimate flow direction.
Landmark Surveying provided grade elevation at the soil boring locations at the time of
drilling. The elevations are indicated on the attached boring logs.
2) How were the groundwater elevations established as indicated in Section 0 on
pages 5 and 6? Were they estimated solely from the Washington County Atlas?
Based on the soil boring information, groundwater elevations within the Quaternary Drift '
Aquifer beneath the site range from about 905 in the eastern portion of the site to 915 in '
the western portion of the site. This is consistent with information contained within the
Washington County Geologic Atlas. Groundwater elevation information was obtained
from the Washington County Geologic Atlas and the three soil borings that were drilled
on the site. Groundwater levels on the Site Plan and Cross-Sections have been modified '•
slightly to reflect the water levels from the soil borings instead of the Geologic Atlas. The
direction of groundwater flow indicated by both the information in the Washington County
Geologic Atlas and the soil borings is to the east towards the St. Croix River.
• 3) Please provide boring logs for the 3 borings shown on plate Cl. The CUP
Indicates the boring logs are included with Appendix 3. We did not receive
Appendix 3.
Copies of the boring logs are attached.
4) What time of year(month)were the borings drilled if not indicated on the logs?
The borings were drilled May 31 —June 1 1989.
5) Where the borings completed as temporary piezometers that depth the
groundwater levels were measured? If,so are there survey data for these wells
and provide a map showing there locations.
No, they were simply borings, not piezometers.
6) What time of year were the initial depth the groundwater levels estimated in the
borings or wells?
The groundwater levels were estimated at the time the soil borings were drilled, prior to
cave-in on May 31-June 1, 1989.
7) Section 01,page 6, 3rd paragraph: What is "separating"the drift aquifer from the
Prairie du Chien—Jordan at this site?is this based on local or regional data
provided in the Washington Co. Atlas?(Note, this may be explained after we
review the boring logs)
•
This is based on information in the Washington County Geologic Atlas which indicates
that the Potentiometric surface of the Prairie du Chien Jordan aquifer is approximately
88O-88U feet above mean sea level ot the site and the Quaternary Drift isat
approximately 910 feet above mean sea level at the site, indicating at least some degree
�
of hydraulic separation. Further review cf adjacent well logs indicates that there tends to
be a substantial amount of clay layers within the drift in this area which can create the
separation. However, area wells are typically finished in the Jordan and while some of
the water levels match the County potentiometric surface map quite nicely, not ail of them
do, leaving open the possibility that there is at least some degree of hydraulic connection
between the two aquifer systems.
8) Are there any site-specific groundwater level comparisons between the drift
aquifer(sand and gravel)and the underlying Prairie du Chien—Jordan (i.e. from
monitoring wells)? Tabulated values*r well hyurogmypha would besufficient.
We have approximate water levels of the drift aquifer from the time the soil borings were
drilled, May and June 1989 and we have an approximate water level of the Prairie du
Chein-Jordan aquifer at the time the well was drilled, in February 1992. Water levels
could vary substantially from year to year,therefore the available data do not provide a
direct comparison nf water levels in the two aquifer systems. A copy uf the production
well log ivattached.
'
Vy LBGio missing cross-sections A`A'andD-D'from plates C4 and C7.
Copies of Cross Section A-A'and D'D'amattached.
10) Please provide any historical groundwater levels for th*on'site water supply well
and any associated survey data.
The well log indicates that when the production well was drilled on February 28. 1982.
groundwater level was 20' bn||owgmdo. According toa survey from Landmark surveying
the well ioaton elevation of938.T. However, hio not known if this shot represents a
ground shot oro top of well shot. The County permit required annual sampling from this
well, but did not require any groundwater level date becollected.
YV Is on'm/mo water supply well actually located where the CNN has it shown on Figure
2? Please provide e map with the location of the water supply well.
The revised Site P|en, Figure C1 iUuoiro(eo the location of the production well. �
1Jy Provide a cross-section location map.
The section location map is indicated on SheetC4.
13) Please provide the appropriation permit number for the Bracht water supply well.
The water appropriations permit number io82'0231, A copy o/the Permit iaattached.
'
Well Log Report- 00495402 Page 1 of 2
Minnesota Unique Well No. MINNESOTA DEPARTMENT OF HEALTH
495402 Coup Washington WELL AND BORING Entry Date 04/02/1993
• Quad Marine On St.Croix Update Date 0 711 5/20 0 4
Quad ID 118A RECORD Received Date
Minnesota Statutes Chapter 1031 —
Well Name BRACHT BROS.GRAVEL PIT Well Depth Depth Completed Date Well Completed
Township Range Dir Section Subsections Elevation 991 It. 75 ft. 02/28/1992
7.5 minute 75 ft.
32 20 W 35 BCDABD Elevation Method topographic map Drilling Method Non-specMed Rotary
(+/•5 feet)
Well Address El II
SCANDIA MN Drilling Fluid Well Hydrofractured? ❑ l�
Yes No
Bentonite From Ft to Ft.
Geological Material Color Hardness From To
CLAY 0 13 Use Commercial
SANDROCK AND GRAVEL 13 52
SANDROCK AND GRAVEL 52 57
WEATHERED ROCK 57 65 Casing Type Steel(black or low carbon) Joint Welded Drive Shoe? 0
WEATHERED ROCK 65 73
ORANGE-YELLOW SANDSTONE ORN/YEL 73 75 Yes ❑ No Above/Below 1 ft.
—
Casing Diameter Weight Hole Diameter
8 In.to 59 ft. lbs./ft. 8 in.to 75 ft.
Open Hole from 59 ft. to 75 ft.
Screen NO Make Type
Diameter Slot/Gauze Length Set Between
•
Static Water Level
26 h. from Land surface Date Measured 02/28/1992
PUMPING LEVEL(below land surface)
31 II. after hrs.pumping 260 g.p.m,
Well Head Completion
Pitess adapter manufacturer Model
❑Casing Protection ❑ 12 in.above grade
❑Al-grade(Environmental Wells and Borings ONLY)
REMARKS
GAMMA LOGGED 5-15-1992. Grouting Information Well Grouted? ❑ Yes ® No
Located Minnesota Geological Survey Method Digitization(Screen)•Map
(1:24,000)
Program COUNTY WELL INDEX Date 05128/2004
Unique Number Verification Information Nearest Known Source of Contamination
from owner _feel __direction ._type
illSystem U7M-Nad83,Zo ne15,Meters X: 514865 Y: 5007232 Well disinfected upon completion? ❑ Yes ❑ No
http://mdh-agua.health.state.mn.us/cwi/well_log.asp?wellid=0000495402 3/13/2008
Well Log Report - 00495402 Page 2 of 2
Pump [] Not Instaled Date Installed
Manufacturer's name JACUZZI Model number 1556H4S HP 15 Volts Z 4
Length of drop Pipe_fL Capacity_g.p.m Type Submersible Material
411111
Abandoned Wells Does property have any not in use and not sealed well(s)? ❑
Yes ❑ No
Variance Was a variance granted from the MDH for this well? ❑ Yes ❑ No
Cuttings Yes Borehole Geophysics Yes Well Contractor Certification
First Bedrock Prairie Du Chien Group Aquifer Prairie Du Chien-Jordan Selverde Well Co 82006 RDA W
Last Stet Jordan Depth to Bedrock 52 ft. License Business Name Lie.Or Reg.No. Name of(killer
County Well Index Online Report 495402 Printed 3/13/2000
HE-01205-07
•
•
http://mdh-agua.health.state.imt.us/cwi/well log.asp?wellid--O000495402 3/13/2008
......_ -,-..-
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LOG OF TEST BORING t
106 NQ, 4220 B9 U_,._ . VERTICAL.$CALE T7'""-5' BORINO NO.
'.-)'''''-i''.41 ?b'OJECT BBAPFL PJT _851B STl{FEI ::1ASASJ`OF CO RORQ'3.,._„SCANl1A dl,NNESO.A
PTM DE IPtlON OF MATERIAL SAMPLE IABQRATOAAYTESTS
�n 913 .4&* OEOL JGIC i... ;; 1 L
PEET SURFACE ELEVATION " O001N N WI.: NO TYPE .W. D.
Ou
RL.
i
SAND WIGRAVEI.,, med thm grained, brown,•-,COARS.t
moist to 441. then waterbearing • ALLUVIUM
it.':-.',''
- " medium dense to very dense (SP) - 1 IiSA
z>
T
'I': 10 2 SB NSR
-38 ' 3; S,O
i
t ';,54 4 56 .
f
21 '
hnd ofi Boring
* Surface Elvevat :on ,inforlhaatioti '- ' '
? added by SandeSnglieexng : Inc.
from information obtained y H.
Landmark Surveying, Tile.
r
i
r
WATER LEVEL MEASUREMENTS START '.S-31-89 :COMPLETE :: .�.31_�89
_ SAMPLED Gnsir.ip cavE10 rin,rEa Mer'NOD 3 11 a1, 1011, ,: 0, 1 10 DAZE 1IMe DEPlii'' t)EI?_1}i 1EPYN', BARED DEP1NS .LEVEL .„ ..of ,-_V_. 7t .�.._.I.___a___;.__.
5 3.1 11 59 ;6 ' 4 Ip 4 J'
Ali 5-31 1 ,10 21 ' " 19k'_. ._..:. -to 4 :'.. .
lipr5-31 . . 1:20 21 ' _ None ,o A3, __ .'__.._-:_ ___ ..__ _ .
'a �p GAeWGtieF iKulhanek
.> . . ,,,,_ t .w1n M.itY LESbbnq
'.� .. _, „zi + ,A;i1C ,_.hh?k)2a+3,.4w�16ws .:;r .,;-,01 .W ,r_,;,. nksk.
LOG OF`TEST BORING
�QS No 4220. 89 13 2 �
fiRTtCAI's Ai.e 1 'eofit1401NO.'- •
PAOJE C Y
oEvrrl PESGtrrAA[ nr tNt7EAiAL
IN 9UARAG EIEVATtON >7 S . A IPIE'
'flit � c3E4QGIC _ CApORA1QAY[C$T$
,
.., 'CLAY',
, •.. ; ' . :..•. r.',' � . ;Ofifath N Wl' NO tYPE W D. `t..t, �Qu
LEAN CLAY, dark ra tsh:browtE CL'. pt
9 Y ( ) 'TbPSOIL
3 • .
1 NSA
LEAN CLAY, brown, medium. (CL). FINE
ALLUVIUM NSA
3 50
5 - SILTY SAND;, •fine- grained, brown,
CQARSE 4 SB
moist, medium dense, a few lenses of ALLUVIUM;
• lean clay (SM.)
SAND fine grained, light brown,
moist, medium dense, (SF');
1:1 • 5 58, '
SAND W/A LITTLE GRAVEL`<, fihe _t:d • '.r__
medium grained, bro:iti, moist, _ 13 6 .S8
medium`'dense to dense (Sp.);
•
16 7 SB
27
SAND W/S'ILT AND A I,.ITTLE ;.GRAVEN:, . .
fine gr.ained,. browt , moist, dense,
7 lenses of 'si 1 t and si.l'ty. sand - ,
(SP SM)' 30 9 S$
•
34 ,
SAND W/SI_LT .AND A LITTLE GRAVEL ..
fine to. mediuiif grai'Red, brown, moist, 19 10 S8
N dense •(SP.r5M)
38' SILTY •SAND .W/A LITTLE GRAVEL a.,few ,"TILL .
cobbles, reddish brown, ino;tst to wet,',
40,,._dense "ta:_.:uee,ry :dens•R : (S0
Continued ott text Boring'
* Surface -tlevation informcntfon added
by +Suncle' Eng,ineeri..ng, xne ,. ob twined ': '.,' . ", '••. .:. ' : , , 411
from Lnndtnark Surveying, tnc
•
ti:` • • twit' city ti ti.nt3'•
.`a°,Z r. it,,,,,A.tty` � .Ullut ?r�?`_St2kAKSar.,a4 r<'re,. i...t,3.<,'f:,,
T LOG OF TEST BORING
{ roe No: 4220.89 1.392 VERTICAL scaLE
t'T�'S 9AFiiNt3 NO 2_(Cont,..)
. ..
{� /}" GRAVEL-PIT 185T1 SIRE , ([''AST OF: O.ROAO 3,, ,SCANQ1A MINNESOTA •
f Y t T .. ."'t.. .....b.w...u...♦
°;'' • SAMPLE LABORATORY TESTS
t 6EPTH. R£SCAtPTtPN PF MA�EtFAI L.L.
OEOLC)GIC
.,si-` IPt ORIGIN N N+l NP. YYPE W P (•Ra.
FEET
q0 5"IL1Y SANG ''' ' IT:TLE .ti.. I EL :;(Cant;'} TILL , 15 - -5-
r� (Sty}` (Cant.) _
s`r
y4
32 12 SB
,•j
L,
i
5 22 13 SB
fit.
v }
r}a 1'4 SB
56
Obstruction (Probab<le Boulder}
r:
} t: i
t
WATER LEVEL MEASUREMENTS .TART 5-31- 9 'cPMPLE7E 6-1 89.
Gr v:SAuPLED CASING -CAVEIN' W T£R METNOO 3.i }�SA Q.'-S ' - Q "_lp
,(' DATE i " 0&!7.H tDEPnni 't)*PTH - . 9AILE0 0£PTN8„�' LEVEL o"-
1_ "9 00 ~5s..3, 541{ . ip '1§1._
6 1 10 10 56' ' _ _ _ io :, _ :8.1'
6-1 io:2S 6' Tlop ?R .. tg1 :
-_
ra caewcr+r F Kulhanek
Guatfl cst' est nA,
��. rrrera ' cortaor*Itron
_e _.. ,,ter t.,..tr...;,,, :2: .,.,.
LOG OF,TEST BORING
JOearo 422(1 A94392 ;: . VERTICAI'SCAIE l ::5 BORING NO 3
pnoJECT GRAVE L•'PJI 1$SSTN 'SikjE EAST"OF',,CO: ROAD.3, SCANDIA INNESOT r� . ', ,,•
iv,,....,,: OEPtn OESGRI^Y!C)N `JF .fll'�EEtlt.. i SAMPLE LABOPAt_PRY TfSl$
IN t GEOtOGiC-
FHET I` SUpfACE EL EYAY�ON ORIGIN N Wt NO TYPE w G Li` Ou
Pt
W SILTY SAND W/A LITTLE GRAVEL, brawn, TILL +
moist, dense to very loose to dense,
a few lenses of lean clay (SM) - 1 NSA
'' M
rti
h23 2S8..
;r .
� 8 3 SB;
3 4 S8'
9; .. _ .. -
24
SAND"WJSILT, fine gratified, 11ght COAhSE`'
brown; inoisit, dense (SP SM) ALLUV•1Lim, 26. 6. SB
26
SILTY.:'SAND W/A LITTLE :GRAVEL, bro.wn', TILL*
a moist, very dense (SM)
39 7 S8'
51 8
fi
: 40
.
Continued ;on Next 8or ng. .
*;.Surface 1evation informat ,vn ",added
by Sutde EngAneerng, Inc , obtained
from Landme k Surveying Inc.
tw11'1 c,t`, tester c, `
'''A LOG OF TEST BORING
Joe No 42?0 89 .1392I„ R 5'
z .. VERTICAL SCALE _ 8()AiNf�t NtT. _.._.....�..�..(.G.ora..t,.�_
PROJEGt GRAVEL PIT; 186:TH.-STREET; .EAST_:OF CO`RoAU 3,: $oANUTA,, 11IIIttESOTA .._._.__. _ . ..._-
•5 OEPTN D.ES RIP IT ON,OF MATERIAL l SAMPLE LABORATORY TESTS
` FEET GEOLOGIC LI.
ORIGIN N WL NO. TYPE W D P.L. Qu
= 40 SILTY SAND W/A LITTLE GRAVEL . (Cont.) TILL 41 9 SB
4 (SM)
w
f{ 44
• LEAN EAN CLAY brown and gray mottled,1N
3f - very stiff (Cl)(CI.) ALLUVIUM — 51 10 SB
46 .
SAND W/SIIT, fine grained, light COARSE
K' brown, moist, very dense (SP=SM) ALLUVIUM
r is .
v, 59 11 SB
t 54
SILTY•-SAND W/A. LITTLE GRAVEL, tledlUm MIXED
,� grained, brown, moist, very dense, ALLUVIUM _ 64 12 SB
lenses of sandy lean clay` (St4}
58
{ SILTY SAND, f'in gained, 11§ht ,° COARSE f
_ brown, wet, very dame (SM) ALLUVIUM i3 SD
6t) • ','51;
r� LEAN CLAY, white ALLUVIUM 14 B
f very st;i:f:f•, striae lenses of sand.'.and SOILS OR
y; - silty sand (tray be;sha'ie) (C"k) POSSIBLE;:
WEATHERED
TOMAN.
MEMBER OF. 80 15 SB
FRANC•ONIA
68 ,.
FORMAT I:ON
SAND W/SILT, fine grained,_ brown;
waterbearing, very dense, :some :lenses
— of .leancla
71 .._.0 �. _..., . clay `.{'See i_t} ' ,(SP-SM) 34 16 SB
End
of Rtiring M
$ ,
#1 - (Appears°...to be';weath;ered or
i — redeposited s:artdstone)
T
"
_
•
WATER LEVEEMEASUkEMENTS' START-. S-'UO�-89:.._. COMPLETE ._.5.-.3:; 89.
SAMPLED GASiN6 GAVEd`N � �M' :�WATEfa. b
H °AEA°DEPTH$ LEVEL METNDD { ttSA 69 1
«AtE rAiE DBRtH DEATH : DEPT v -.,. _..... �' ._,1._S,ml_�I..:O�_;
5-31 10.2 '6:iii 59#7 --
5-31 11 0 71' --§9 3,
5-31 11:2t1 71 ' -. ..None � _ 6
21 '' t° --= = .None...a . _. __
�° eaEwGwE� Kulhanek
ar; ..
t wi n cit'' C `tiriq�
SE?{7l.8TS crafDOt tton'
- •..
Ak+7"54 vqp vi..ahrmr. u.p.� POM.K
Kirsten Pauly, PE/PG,Principal
Brian Mundstock,PE,Principal
Mike Kettler, PE,Principal
41111
Consulting Civil Engineers
April 16, 2008
Sherri Buss
City of Scandia Planner
TKDA
444 Cedar Street Suite 1500
Saint Paul, MN 551010-2140
Attached please find the additional information regarding the Bracht Bros., Inc.
CUP for mining and processing operations requested in your March 27, 2008
memo.
1. Concept Ultimate Use Plan: This plan illustrates one potential use of the
property after reclamation.
la. Reclamation Phasing C-3A: Attached is a reclamation phasing plan that
illustrates where reclamation has occurred and the phases of future reclamation.
Because this site is so small, the majority of the central and northern portions of
the site (mining phases 1 and 3) will remain open to accommodate processing
and stockpiling areas. The approved reclamation plans that the site has been
operating under for the past several years have always indicated that the
majority of fill for reclamation will come from the eastern portion of the site,
outside of the mining limits. This area will be graded as part of final reclamation
activities to establish final reclamation grades and include removal of the eastern
screening berm.
2. Soil Balance calculation: A part of the original permitting of this site, a soil
balance calculation was performed. This information is attached.
3. Seed Mixtures: The Reclamation Plan, Sheet C-3 has been revised to include
the seed mixture and maintenance.
4. Traffic Information:
The table illustrates below the estimated average daily traffic from the Bracht
site is 6-7 trucks per day based on the last five years production rates.
Employee trips are 2-4 per day.
Sunde Engineering, PLLC. 110
10830 Nesbitt Avenue South • Bloomington, Minnesota 55437-3100
Phone: (952) 881-3344 • Fax: (952) 881-1913 E-mail: info@sundecivil.com
Ms. Sherri Buss
5/1/2008
Page 2
I
The maximum daily truck traffic is 50 trucks per day.
An estimated 95% of the truck traffic goes west towards County Road 3
An estimated 5% of the truck traffic travels east towards Marine or Stillwater
AVERAGE TRUCK TRIP GENERATION
Year Volume CY Tons Trucks/yr Trucks/day Trips/day trucks/hour trips/hr
1991 39,011 54,616 2,731 18 37 2 3
1992 39,179 54,851 2,743 19 37 2 3
1993 58,754 82,256 4,113 28 56 2 5
1994 37,488 52,483 2,624 18 35 1 3
1995 22,947 32,126 1,606 11 22 1 2
1996 20,219 28,306 1,415 10 19 1 2
III1997 14,955 20,938 1,047 7 14 1 1
1998 15,273 21,383 1,069 7 14 1 1
1999 19,590 27,426 1,371 9 19 1 2
2000 14,852 20,793 1,040 7 14 1 1
2001 10,053 14,074 704 5 10 0 1
2002 10,164 14,230 712 5 10 0 1
2003 24,203 33,884 1,694 11 23 1 2
2004 6,901 9,661 483 3 7 0 1
2005 15,673 21,942 1,097 7 15 1 1
2006 7,374 10,323 516 3 7 0 1
2007 16,710 23,394 1,170 8 16 1 1
Average traffic is based on an 7 month construction season
5 days a week 148 operating days 12 hours/day
Avg of 20t tons/truck
Ms. Sherri Buss
5/1/2008
Page 3
5. Hydrogeologic information: This information was submitted under separate
cover.
Kirsten Pauly, PE
Reg. No 21842
SUNDE ENGINEERING, PLLC
•
•
NOVEMBER 2007
Updated with submittals
through May 1, 2008
BRACHT BROS INC.
CONDITIONAL USE PERMIT APPLICATION
FOR A MINING AND PROCESSING OPERATION
CITY OF SCANDIA
Consulting Civil Engineers
• Sunde Engineering,PLLC
10830 Nesbitt Avenue South • Bloomington,Minnesota 55437-3100
Phone: (952)881-3344 • Fax: (952)881-1913 • E-Mail: info@sundecivil.com
BRACHT BROS., INC.
•APPLICATION FOR CONDITIONAL USE PERMIT
GRAVEL MINING, CRUSHING
AND WASH PLANT OPERATIONS
CITY OF SCANDIA, MN
INTRODUCTION
Bracht Bros., Inc. currently owns and operates a gravel mining operation in the City
of Scandia, MN. Mining of gravel at the site predates any type of permitting
requirements. However, more recently the site has been issued five year permits
from Washington County (since 1991) as well as annual permits from New Scandia
Township. The following permit application is submitted on behalf of Bracht Bros.,
Inc. (Bracht) in compliance with the City of Scandia's Ordinance No. 103 and
Chapter 4 of the Development Code: Mining and Related Activities Regulations
adopted by the City of Scandia on August 28, 2007.
SITE INFORMATION
1.) Name and Address of Operator and Land Owner:
Bracht Bros., Inc
8303 216th Street North
Forest Lake, MN 55025
2) An accurate legal description of where the mining shall occur:
The legal description is included in Appendix 1. The mining site is 40 acres in
size. However, only about 25 acres are permitted for mining.
3) Names and addresses of adjacent property owners within 1/2 mile of the
perimeter of the area being or to be mined:
A list of all property owners within a 1/2 mile of the perimeter of the area to be
mined has been provided under separate cover.
4) A narrative outlining the type of material to be excavated, mode of
operation, estimate of amount of material to be removed, plans for blasting,
estimated time to complete the removal, and other pertinent information to
explain the request in detail:
Operations at the site are typical of sand and gravel mining operations.
Extraction of sand and gravel is achieved with loaders. Material is crushed on
site using a portable crusher that is periodically brought to the site. When the
stockpiles of crushed material are depleted, the crusher is brought back to the
•
• site for additional processing. A washplant, including conveyors, screens and a
supply well, are located on site in the lower portion of the mine floor. Washing
removes the fine particles associated with the sand and gravel. No chemicals
are used in the washing process. Water discharged from the wash plant is
directed to sedimentation ponds. The fine materials settle out and the water is
recycled back to the wash plant. The wash plant operates with recycled water
about 80% of the time. The sedimentation ponds are dredged out periodically to
remove material that has accumulated at the bottom of the ponds. This periodic
maintenance restores the storage capacity of the ponds. The dredged material is
used for reclamation. A Minnesota Department of Natural Resources Water
Appropriations Permit is obtained on an annual basis. Other activities include
stockpiling, sale of materials and reclamation activity.
There is an estimated 10-15 years of mining activity remaining at the site,
depending upon market demand. Annual production is approximately 15,000
cy/year. There is no blasting at this site.
Storm water runoff collects in the sedimentation ponds and at the lower portions
of the mine floor. The runoff collects and then infiltrates the underlying sandy
soils.
5) Fee:
• The required application fee has been submitted under separate cover.
6) Survey indicating property boundaries:
A survey of the site including property boundaries is included as Sheet Cl, Site
Plan.
7) Map of property indicating where mining is to occur and other significant
features as required in Ordnance 103:
Sheet Cl, Site Plan, illustrates the site property lines, limits of proposed
excavation, setbacks, and topographic data at two-foot vertical intervals. Water-
courses, wetlands, wooded areas, rock outcrops, power transmission poles and
lines, and other significant features are also shown.
8) General Location Map and Aerial Photo:
A General Location Map, an Aerial Photo and a USGS Quad Map Excerpt, are
included as Figures 1-3, respectively. These figures show the existing mining
site in relation to the community.
9) Maps and Plans showing the following for the site and within 300 feet of the
perimeter of the mine:
2
•
A. Roads or streets showing all access routes between the property and
the nearest arterial road, identifying name, right-of-way width and
traveled portion width.
Access to the site is from 185th Street North. There is a stop sign on the haul
road for trucks leaving the pit area prior to turning onto 185th. There is also a
stop sign at the junction of 185th and County Road 3, There are two access
roads to the site; both access points have locking gates. The eastern haul
road is fenced off from all abutting property owners with a three-strand barbed
wire fence. 185th is a gravel road. Bracht reimburses the City for calcium
chloride applications that are used to control dust.
The names, right-of-way widths, and traveled portion width of all adjacent
roads are illustrated on Sheet Cl, Site Plan,
B. Easements Plan with widths and purpose.
Easements, with widths and purpose are illustrated on Sheet Cl, Site Plan.
C. Natural land features showing locations of watercourses and
drainageways, flood elevations, wetlands, sinks, basins and wooded
areas.
1110
The locations of natural land features are illustrated on Sheet C2.
D. Natural resources including other surface water, groundwater depth,
flora, fauna, and any other natural features in the rural environment.
The locations of natural land features are illustrated on Sheet Cl, Site Plan.
E. Manmade features such as buildings and other structures, dams, dikes,
and impoundments of water.
Man-made structures are indicated on Sheet Cl, Site Plan.
F. Adjacent land features with all of the requirements included above
within 300 feet of the perimeter of the mine, and all platted subdivision
lots, metes and bounds parcels, and homes within 1/4 mile of the
property boundaries. Wells should include private/agriculture,
industrial, municipal wells within 1/2 mile radius of the mine.
Adjacent land features are shown on Sheet Cl, Site Plan. Homes within 1/
mile and wells within '/2 of the site are shown on Fig. 2. All platted subdivision
lots, metes and bounds parcels, and homes within 1/4 mile of the property
boundaries are indicated on Figure 4.
•
3
•
G. A minimum of 1 cross section for every 1000 feet running north/south
and east/west, showing the extent of overburden, extent of sand and
gravel deposits, the groundwater level, and any evidence of the
groundwater level in the past.
A series of four cross sections that depict the existing elevation, overburden,
final elevations, extent of deposit, and the elevation of the groundwater are
included as 04 -7. Three soil borings were completed as part of the original
permitting process. The soil borings were used in developing the site cross
sections.
H. All processing areas and boundaries shown to scale.
Processing areas are identified on Sheet C3, Site Plan.
All access roads within the site to processing and mining areas shown
to scale:
Access Roads to the processing and mining areas are indicated on Sheet Cl
• Site Plan.
J. Sequences or phases of operation showing approximate areas involved
shown to scale and serially numbered with a description of each.
Phasing is indicated on the Mining and Phasing Plan, 02.
K. Location of screening berms shown to scale, and notes provided
indicating when they will be used as reclamation material. In the same
manner overburden storage areas must be identified and noted.
Landscaping has been completed in accordance with plans previously
approved by Washington County in 1991. There are a number of berms
located around the property and trees planted around the perimeter of the
property provide screening from adjacent land uses. Many trees were
planted several years ago and have become well established and provide
excellent screening. The location of screening berms and overburden
stockpile areas are indicated on Sheet Cl, Site Plan.
L. Fences and gates and their type or construction described and
illustrated:
S
Fences and gates are indicated on Sheet Cl, Site Plan. A three strand
barbed wire fence is in place around the perimeter of the site. Locking gates
are located at the entrances to the facility.
M. Proposed location of principal service or processing buildings or
enclosures as well as locations of settling basins and process water
ponds:
Wash water ponds are indicated on Sheet Cl, Site Plan. There are no
buildings located on site.
N. Existing site drainage features and flow directions indicated. A plan for
handling surface drainage during operation and after final reclamation,
consistent with local surface water management plans.
Surface runoff is contained within the site. The runoff collects and infiltrates
into the underlying soils. Erosion control measures used at the site include
establishment of vegetation on perimeter berms.
Erosion and sedimentation control practices after final reclamation include
achieving permanent stabilization of the site through proper reclamation
design standards. After mining is completed, reclamation will be performed to
restore the site to a stable condition, minimize the potential for erosion and
allow for future development of the land.
•
Reclamation will involve slope stabilization, seeding and mulching. The
Reclamation Plan, Sheet 03, indicates proposed site elevations upon
completion of restoration. Slope stabilization will be accomplished by
backfilling and grading the side slopes to a maximum of 4:1 (horizontal to
vertical). A minimum of four inches of loamy soils, suitable as topsoil, will be
placed on the graded slopes. After topsoil has been placed, the slopes will be
seeded and mulched to establish vegetation. Reclaimed area will be planted
with a mix of native trees, shrubs, grasses, flowers and groundcover.
O. A plan for groundwater quality protection to include a minimum of three
soil borings showing depth to groundwater.
1. Hydrogeologic Setting: The bedrock subcrop beneath the site is eroded
surface of the Prairie du Chien Group and the Jordan Sandstone. The
Washington County Geologic Atlas' indicates that the site is located over a
small, buried valley. The Jordan Sandstone likely forms the bedrock subcrop
over the northwestern portion of the site. The Prairie du Chien Group forms
the subcrop in the southeastern portion of the site. At the location of the
wash plant well, about 16' of eroded Prairie du Chien Group remains over the
Geologic Atlas- Washington County, Minnesota. County Atlas Series C-5. ed. Lynn Swanson and Gary Meyer,
Minnesota Geological Survey , University of Minnesota St. Paul. 1990
•
5
Jordan Sandstone. The elevation of the bedrock subcrop at this location is
approximately 860 feet above mean sea level.
Three soil borings were drilled at the site in 1989 in conjunction with the
County permitting process. The soil borings were used to establish the depth
of topsoil in undisturbed areas of the site, elevation of the groundwater, and
the extent of gravel reserves at the site. Each of the borings extended to the
water table. Soil borings are included as Appendix 3. The first groundwater
contact beneath the site is associated with the Quaternary Drift Aquifer.
Groundwater beneath the site within this aquifer flows to the east towards the
discharge region of the St. Croix River Valley. The Washington County
Geologic Atlas indicates a relatively strong gradient to the east of 100' per
mile. Groundwater contours are indicated on Cl, Site Plans. Based on
available information, Big Marine Lake appears to be a reflection of the water
table surface.
Beneath the glacial sand and gravel is another source of groundwater
associated with the Prairie du Chien-Jordan Aquifer. These two bedrock units
are hydrologically connected and function as a single aquifer. In the area of
the gravel pit, the Prairie du Chien-Jordan Aquifer is separated from the
overlying Quaternary Drift water table aquifer. Plate 5 of 7 in the Geologic
Atlas indicates that the Prairie du Chien-Jordan Aquifer exists under confined
conditions with a hydraulic head of approximately 880-890 feet above mean
• sea level in the area of the gravel pit. This is about 25 feet below the water
table's potentiometric surface.
2. Groundwater Protection: Mining will not occur within or below the ground
water table. Mining is limited to an elevation of 920 feet above mean sea
level. Over ten feet of soil will separate the water table from the land surface
after final reclamation.
All fuels are stored above ground with secondary containment. Fuel storage
is limited to fuel needed to operate the wash plant and the crusher.
The on-site well is sampled for hydrocarbons on an annual basis (see below).
P. All mining operations must install one monitoring well. If the proposed
mining operation will appropriate groundwater for use in mining
operations, the operator shall install not less than one monitoring well
down gradient of the mining operation. If the proposed mining
operation will include mining into the groundwater table, not less than
two monitoring wells shall be installed one up-gradient and one down-
gradient of the mine.
The wash plant supply well is sampled on an annual basis when the wash
plant is in operation. Analysis is performed for diesel range organics (DRO).
•
6
This test monitors for contamination from diesel fuel and other petroleum •
based products. Results will be submitted to Scandia in the annual report.
DRO's have not been detected above the minimum detection limit during any
of the past sampling events.
Q. If lighting is proposed, a plan for lighting the area must be provided.
The plan must comply with all City ordinances pertaining to lighting.
There is no site lighting.
R. Reclamation Plan in conformance with Section 8.
Reclamation standards as included in Ordinance No. 103 Section 8.3-8.8 will
be followed.
1. Intent: The intent of reclamation activities covered in this section is to restore
the site to a stable condition, minimize the potential for erosion and allow for
future development of the land.
2. Methods and processes of reclamation: Reclamation will include backfilling to
stabilize slopes at a maximum slope of 4:1, seeding and mulching. A
minimum of four inches of loamy soils, suitable as topsoil, will be placed on
the graded slopes. Topsoil shall be placed on the area to be reclaimed, and
the area will be seeded within 6 months of completing the backfilling. Topsoil
will come from on-site sources.
4110
After topsoil has been placed, the slopes will be seeded and mulched to
establish vegetation. Seeding and mulching will be in accordance with
Minnesota Department of Transportation (MnDOT) Standard Specification
No. 3876 and 3882. The seed used will be MnDOT Seed Mixture 240 or
approved equal. Type 1 mulch will be used. It should be recognized that
portions of a given phase, for example, along borders of subsequent phases,
within the processing and operations area and along haul roads, may be left
at an intermediate stage of reclamation until completion is practical.
3. Initial condition of mining site: The site has been a mining site for decades.
4. Limits of various operational areas: The operational areas are indicated on
the Site Plan, Sheet Cl.
5. Phasing and timing of operations and reclamation including areas to be
stripped of overburden: Phasing of mining operations is included on the
Mining and Phasing Plan Sheet C2. The entire site has been stripped.
Some reclamation activity has been completed. The north line of Phase 1
was backfilled to a 4:1 slope, topsoil was applied, and vegetation established.
Mining has been completed in Phase 1, and the processing and operating
area has been established at the base of this phase. The wash plant,
•
7
• sedimentation ponds, and stockpiles are located on the pit floor, so additional
backfilling and reclamation activities will not be possible until after completion
of the mining operation.
6. Final Condition of the site, including proposed contours and landscaping: The
Reclamation Plan, Sheet C3, indicates proposed site elevations upon
completion of restoration.
7. Relation of final site condition to adjoining land forms and drainage features
within 1/4 mile: The site will slope from 185th street towards the north and
match existing topography in the northwestern portion of the site blending in
with surrounding lands. The site will drain internally with ponding areas
located within the reclaimed areas.
8. Relation of reclaimed site to planned or established uses of surrounding land:
The land is designated general rural/agriculture with 4/40 densities.
Surrounding land use is similarly guided. Established land uses are
agricultural and rural residential in nature.
9. A plan for maintenance of reclaimed area: See Reclamation Plan, Sheet C3.
10. A detailed cost estimate of reclamation and maintenance: Reclamation costs
for the area currently opened to mining activity are outlined below.
The western portion of Phase 2 has been mined out. Overburden from the
eastern portion of Phase 2 has been backfilled into the western portion of
Phase 2. Application of topsoil and seeding will be done once mining is
completed in Phase 2 and the remaining portion of Phase 2 is backfilled.
Updated reclamation costs have been prepared which take into consideration
the mining and reclamation activity performed to date.
Reclamation costs are based on the following:
• Phase 1 — mining completed, reclamation along the northern perimeter of
the site completed, remaining area left open for processing and operations
area.
• Phase 2 — Mining will be completed in 1-3 years. Backfilling of the eastern
1/2 of Phase 2 is complete. Backfilling of the remaining portion of Phase 2
is required. Topsoil and seeding of the entire phase will be required.
•
8
Reclamation Costs
•
1. Backfilling of actively mined areas: 10.63 acres with
average 6' backfill required = 102,898 cy
2. Dozer backfills at rate of 300cy/hr at unit costs of
$120/hr for machine and operator
[(102,898 cy)/(300 cy/hr.)]($120/hr.) = $41,159
3. 4" Topsoil (20A)(43,560 ft2/A)(4"/12"/ft)/(27 cy/ft3) =
10,755 cy @ $1.00/cy = $10,755
4. Seed and Mulch (20 acres)($600/acre) = $ 12,000
TOTAL RECLAMATION COSTS $63,914
These costs break down to just over $5,000/acre for areas requiring
backfilling, topsoil and vegetation and just over $1,000/acre for areas
requiring only topsoil and vegetation. These costs are comparable or higher
than restoration security required by other permitting agencies throughout the
metropolitan area.
S. If blasting is proposed as part of the mining operations, the operator
must indicate frequency, timing, size, duration and develop a blasting
•
plan:
Blasting is not performed at this site.
T. A description of any processing operations including washing crushing,
recycling and bituminous plants and concrete ready-mix plants.
Overburden is removed from areas to be mined and is stockpiled on site and
later used for reclamation of completed phases. Aggregate is excavated
using front end loaders.
Processing at the site generally includes crushing, screening, washing,
sorting and stockpiling of aggregate, recycling of concrete and asphalt by
crushing, and screening and stockpiling. The processing and production
equipment operates under all applicable Federal, State and local air, water
and noise quality standards.
An on-site well was installed at the site on February 28, 1992. The well is 75
feet deep and is completed in the Jordan Sandstone. The 8" well supplies the
wash plant with water. The well is active only during the construction season
from about May 1- November 1. A Minnesota Department of Natural
Resources (DNR) Water Appropriations permit was obtained for the well on
•
9
• July 7, 1992. The permit allows withdrawal of 275 gpm. The water
appropriations permit is issued annually.
The well water is supplemented with wash water recycled through on-site
sedimentation ponds. Sedimentation ponds receive washplant discharge,
settle out fine materials and reuse the wash water. The pond volumes are
maintained by periodically removing the buildup of sediments.
III. OPERATING CONDITIONS
1. Setbacks:
Mining, stockpiling or land disturbance activities, with the exception of
screening, are setback 50 feet from an adjoining property line, 200 feet
from an occupied structure, 100 feet from any contiguous property
subdivided into residential lots of 5 acres or less, and 100 feet from any
road right-of-way.
2. Fencing:
The entire site is fenced with 3 strand wire fencing. Locking gates are
located at the site access points.
3. Hours of operation:
The site is operated from 7:00 a.m. to 7:00 p.m. Monday through Friday
except holidays. Excavation and processing activities, or sale of material
does not occur on Saturdays. However, maintenance activities do occur.
Extended hours may be required periodically for situations such as
emergencies, accelerated work schedules or weather delays. If
operations are required beyond the 7:00 a.m. to 7:00 p.m. hours, or on
Saturdays, Sundays or holidays, prior permission will be obtained from the
City of Scandia in accordance with procedures set forth in Ordinance No.
103.
4. Screening:
The site is operated in a manner to minimize the visual impact of the
extraction and processing area on surrounding properties. Landscaping
has been completed in accordance with plans approved by Washington
County in 1991. There are a number of berms located around the
property and trees planted around the perimeter of the property provide
screening from adjacent land uses. Many trees were planted in the 1980's
which have become well established and provide excellent screening of
the site.
•
10
5. Dust control:
•
Dust is generated by crushing and screening equipment, excavation and
loading equipment, and vehicular movement. Processing areas are
located at elevations lower than the surrounding terrain in order to
minimize windborne dust leaving the site.
6. Noise:
Noise is generated from processing activities, loading processes, and
vehicular movement. Noise is minimized by conducting processing
activities within the interior of the site at elevations lower than the
surrounding lands. All activities are conducted so as to be in accordance
with all Federal, State and County noise standards.
Noise testing at the site has been conducted on two separate occasions.
Results of both testing episodes show compliance. The first test was
performed by the Minnesota Pollution Control Agency on October 20,
1992. The wash plant was in operation during this test. Monitors were set
up on the north, west, and east property lines. David Braslau and
Associates conducted the second testing episode on June 17, 1994. The
crushing spread was in operation during this test. Monitors were set up on
the east and west property lines.
Testing was performed in order to determine compliance with MPCA
requirements. The table below summarizes the MPCA standards and the
levels measured in the field. Sound levels were well below noise
standards in both cases. The readings were taken at the property line
even though the standards actually apply at the receptors, which are
located some distance form the property lines. The wash plant does not
operate when the crusher is in operation.
L50 (dBA) Lio(dBA)
MPCA Standard 60 65
7AM-10PM
June 94 Wash Plant
North Property Line 57 59.5
East Property Line 47 55.5
West Property Line 59 59
South Property Line <49 52
Oct 92 Crusher
East Property Line 48 55
West Property Line 48 54
411
11
7, Depth of excavation:
The applicant proposes no change to the maximum depth of 920' above
mean sea level that was established in the Washington County Permit in
order to offer groundwater protection and the ability to restore the site.
8. Site clearance:
Trees, stumps, roots and other vegetative material removed during site
clearance or other activities will be disposed of by logging, chipping or
other approved methods. They will not be buried on-site.
9. Appearance/condition:
All buildings, plants and equipment at the site will be maintained in a neat
condition. Weeds and other unsightly or noxious vegetation shall be
controlled as necessary to preserve the appearance of the reclaimed
areas.
10. Sanitary Facilities:
Portable sanitary facilities are provided in the operating area.
11. Waste Disposal:
Any waste generated from the operation shall be disposed of in
accordance with Federal, State and County requirements.
12. Water quality monitoring:
The on-site well is sampled on an annual basis for diesel range organics.
Results will be submitted to the City as part of the annual report.
13. Fuel and chemical storage:
All fuel stored on site is stored in accordance with Federal and State
standards.
14. Contingency Response Plan:
In the event of a fuel leak or spill, immediate action will be taken. If the
spill or leak is active, measures will be taken to control or stop the spill.
Available on-site equipment (loaders, dozers) will be used to contain and
recover the spill. Additional cleanup equipment and personnel will be
called in for assistance as necessary.
•
12
A spill that consists of five gallons or more requires that the MPCA State •
Duty Officer be immediately notified at 1-651 649-5451. Cleanup will
occur in cooperation with the Minnesota Pollution Control Agency.
15. Added Provisions:
The operator will comply with other such reasonable requirements that
the City may find necessary to adopt for the protection of health, safety
and welfare and/or prevention of nuisance.
16. Processing:
The site operates permanent processing equipment in accordance with all
Federal State and City air and water quality and noise standards.
Processing equipment is screened from view from other properties and
adjacent roads. Crushing equipment is placed on the floor of the facility
and setbacks per Ordinance No. 103 are maintained between the
processing equipment and the property lines.
17. Recycling:
The site currently does not conduct recycling operations. If such
operations are conducted in the future, they will meet the operating •
conditions of Ordinance No. 103.
18. Trucking Operations:
The site accesses 185th Street North, a gravel city street. All loads
leaving the site are loaded accordance with state law. Loose material is
cleaned from the truck and tires prior to exiting the facility. Bracht
currently maintains five trucks for hauling. Independent contractors also
purchase material from the pit,
IV. CERTIFICATION
I certify that the plans, specifications or
reports for the above described facility were
prepared by me or under my direct
supervision and that I am a duly Registered
Professional Engineer under the laws of the
State of Minnesota.
sf/17--/1/1.471.—(47-
Kirs en Pauly
Date: November 18, 2007 Reg. No. 21842
•
1 3
• LEGAL DESCRIPTION
All that part of the south half of the Northwest Quarter of Section 35, Township 32,
Range 20, Washington County Minnesota, described as follows:
Beginning at the northwest corner of said south half of the Northwest Quarter;
thence South 1 degree 17 minutes 07 seconds East, grid bearing according to the
Minnesota State Plane Coordinate System in said Washington County, along the west
line of said south half of the Northwest Quarter a distance of 1315.33 feet to the
southwest corner of said south half of the Northwest Quarter; thence north 89 degrees 20
minutes of 10 seconds East along the south line of said south half of the Northwest
Quarter a distance of 1533.21 feet; thence North 2 degrees 27 minutes 10 seconds East
and parallel with a 49.60 foot wide drive as described in Book 219 of Deeds, page 588 in
the office of the Registrar of deeds, of said Washington County, a distance of 730.88 feet;
thence South 89 degrees 57 minutes 10 seconds West a distance of 23.54 feet; thence
North 23 degrees 3 minutes 28 seconds East a distance of 400.17 feet; thence North 20
degrees 27 minutes 9 seconds east a distance of 235.12 feet to the North line of said
South half of the Northwest Quarter; thence South 89 degrees 19 minutes 13 seconds
West along said North line a distance of 1809.41 feet to the point of beginning; except
the West 365.00 feet of said South half of Northwest Quarter. Subject to an easement for
road purposes over the southerly 33.00 feet and to other easements of record, if any.
• And that part of the Northeast Quarter of the Northwest Quarter of Section 35, Township
35, Township 32 North, Range 20 West, Washington County, Minnesota, described as
follows;
Beginning at the southwest corner of said Northeast Quarter of the Northwest
Quarter; thence North 89 degrees 19 minutes 13 seconds East along the south line of said
Northeast Quarter of the Northwest Quarter a distance of 494.07 feet; thence North 1
degree 12 minutes 39 seconds West a distance of 198.68 feet; thence South 89 degrees 19
minutes 13 seconds West a distance of 494.07 feet to the west line of said Northeast
Quarter of the Northwest Quarter; thence South 1 degree 12 minutes 39 seconds East
along said west line a distance of 198.68 feet to the point of beginning.
•
1
95
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• EMMONS
Ilr
&OLIVIER
RESOURCES
MEMORANDUM
Date: March 31, 2008
To: CMSCWD Board of Managers
From: Lisa Tilman, P.E. and Dan Fabian, P.E.
Re: Summary of Review and Recommendations for Permit App. No. 08-005
Bracht Brothers Mining Operation, Scandia
RECOMMENDATIONS
We recommend Managers approve Permit and authorize Administrator to issue permit
contingent on Applicant addressing following comments, to satisfaction of District
Engineer:
Summary of comments to be addressed prior to permit issuance:
1. For the required review fees a deposit of$1,250.00 has been received. Applicant is
• responsible for replenishing this deposit if it appears it will be insufficient to cover District
review costs. The estimated completion date for this project is 2025 +/-. The District's
standard permit length is 1-year. Managers will need to determine duration District permit
will be valid before it will need to be renewed. If permit length is longer than 1-year a
minimum annual status update from applicant and site visit should be coordinated with
Scandia CUP and issuance of Annual Operators Permit. Managers will also need to establish
method to re-coup costs for annual reviews.
2. District surety still needs to be provided. The City of Scandia requires a surety as part of its
Mining Ordinance CUP and Annual Mine Operators Permit. Managers should consult with
City to see if an agreement can be made that District would not need to require a separate
additional surety. Perhaps requiring the applicant to maintain a cash deposit with the District
of some amount as part of the permit fee requirement would be acceptable. This would
ensure that District would recoup on-going review fees, while any major issues could perhaps
be addressed through coordination with the City's permit enforcement process.
3. The existing conditions site plan does not provide contours or other ground elevation
information for the existing bottom of pit. This information is needed to verify that project
has not been excavated within 3-feet of the groundwater table per current District
requirements. Air photos of area appear to show water in bottom of pit. Provide information
on existing ground elevations in bottom of pit on existing plan sheet.
4. The submitted information does not allow a clear evaluation of the potential to drain the two
10 wetlands located adjacent to active mining operations but indicates that mining adjacent to
.
Page
]000
Brack Brothers Mining Operation Sum"/uo'(?fCMYC0D8c,ie~
the wetlands has been completed and that inspections by the County and WC[) have
indicated no impact tV the wetlands. Applicant will need to provide copies of those
inspection reports. Provide field delineation and report for the two vvcdaodx adjacent to the
pit. Maintain an undisturbed hu�erarea ofut |cao( 5O'� from these wetlands until vvcdouds
are delineated and potential impacts and requirements are determined. (Note: the delineation
requirement can be included as o pen-nit stipulation to be completed this spring).
5. huchudc in p/000 procedures for loosing of soil to restore Soil permeability priorto final
planting and site restoration. Concern is that under the reclaimed condition if soils are
used as O|i (as currently proposed) and they are heavily compacted during placement, soils
will function like C soils and runoff will increase.
6. Include measures onavoid tracking of sediment offsite through vehicle traffic in event that
City road is paved in future.
GENERAL COMMENTS AND BACKGROUND INFORMATION
The Bnooh< Brothers Mining Operation in |oou(od on the north side o[ |@5,h Sbcc1, about 1/2 noUc
west of Old Marine Trail in Section 35, T32N, R20W in the City of Scundia, MN (xoc Figure |
for location map). The proposed project entails the continuation of gravel mining and processing
uchvdicx on u 40 acre |n{. The project iuo|udco crushing and v/aubiog n[cruvc and recycling of
concrete and asphalt, but does not include an aapbu|{ plant or pit dc�'uo ''o8. The project vvU|
disturb a �xu| of34acres oo�nio� ioon m|cvudono�920M ; ]Ouuncoo��hcsi\oh-vobcco
� through ` ^
disturbed through past mining operations. The groundwaterdcva<ion is co1irnatod to be about
910 to 905 ft. based on soil borings kdcco in 1989 (to duke soil hndog iuKxnnukm has not
submitted tnthe District). Existing ground elevations nf pit bottom need {obcprovided to verify
current separation from groundwater (�r current mining activities. The site does not drain
'
directly to an identifiedgroundwater-dependent natural resource.
Ycrnliiunn|ico\ion in for completion of planned mining activities 0lnooub cnmp|c|c ncx\orohnn of
vcgciohon for entire site. Any further proposed development of site following complet'oil of
mining activities will require o no:/ pcnuit application submittal and will need to meet the
district permit requirements applicable u\ the time o[submittal.
TbcCunnc|iun Marine Si Croix VVokrxbcd District (District) ioi6uUyprnvidod review comments
/o 8candiuon this projectUhat primarilypertained \n the completeness of information received by
City to nocot District permit submittal requirements, in our letter dated January 24, 2008. All
remaining nnyJoiu|n, needed for u complete District Pen-nit Application for this project, were
received on MurdhZ4, 2008. The Dio�idalso provided input to Scaodioduhngd d n�on\ of
their Mining Ordinance in .2OO7 '
Page 3
3/31/08
Bracht Brothers Mining Operation Summary of CMSCWD Review
III
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