7.b iii Corrected Jensen Watershed District permitEmmons & Olivier Resources, Inc. - 1 - 3/4/19
Carnelian-Marine-St. Croix Watershed District Permit Application Number 19-003
Applicant: Brent Jensen
113XX 218th St. N
Scandia, MN 55073
612-770-6681
brent@npainc.net
Consultant: TBD
Purpose: Land Disturbance Plan for construction of a new driveway to serve a future
single family home riparian to German Lake.
Location: 11245 218th St. N, Scandia, MN.
District Rule: 3 & 4
Recommendation: Conditional Approval pending receipt of the following items related
to:
Stormwater Management
1. For future home only – Stormwater management plan
providing stormwater BMPs receiving runoff from the majority
of impervious surfaces. Complete the District’s Small
Residential Project Stormwater Worksheet for sizing of
stormwater management feature(s). BMP construction details,
installation instructions and protection notes may be
incorporated directly or by reference from District guidance (see
attached).
Erosion & Sediment Control
2. Grading and erosion control plan identifying the placement and
specifications of erosion control BMPs. This should include, but
may not be limited to a rock construction entrance, silt fence
downstream of disturbed areas, revegetation specifications, and
a construction implementation schedule.
Floodplain
3. For future home only – Specification of the proposed lowest
floor elevation to be at least 2-feet above the 100-year elevation
of German Lake (958.7) and 1-foot above the natural emergency
overflow elevation.
Permit Application No. 19-003 Jensen Driveway & Residence, German Lake
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Wetland Management
4. Relocation of the proposed driveway east to at least 32.5-feet
from the delineated wetland boundary (this appears feasible with
a new alignment along shallow slopes) per buffer width
averaging afforded by District Rule 4.3.7.
5. Additional details for the proposed driveway culvert that will
serve as the outlet of the Manage 2 wetland on the north
boundary of the site. This should include the surveyed elevation
of the existing overflow of the wetland, confirmation that the
overflow elevation will not be altered, and culvert sizing details.
Administrative
6. For future home only – Completion of a draft Buffer
Declaration (template attached) in accordance with District Rule
4 (attached) providing a 100-foot buffer from the OHWL of
German Lake (955.5) and 75-feet from the delineated wetland
boundary of the Manage 2 wetland.
7. For future home only – Completion of a draft Declaration for
Maintenance of Stormwater Facilities for access to and
maintenance of proposed stormwater features (see attached
District template).
Stipulations: 1. Contact information for the responsible erosion
control contractor/site manager must be provided
to the District Administrator prior to initiating
work.
2. Notify District Administrator after erosion
control is installed but prior to start of
construction.
3. All work shall be in accordance with the
approved design, plans, computations and
specifications on file with the Carnelian-Marine-
St. Croix Watershed District and any stipulations
identified in this permit. Any proposed revision
to grading, drainage, landscaping and erosion
control plans shall be submitted to the District for
prior approval.
4. Applicant shall not alter or disturb the existing
shoreline of German Lake.
Permit Application No. 19-003 Jensen Driveway & Residence, German Lake
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5. Applicant is responsible for obtaining all other
required permits and approvals for construction
of proposed project.
6. Install and maintain silt fence down-gradient
from all proposed disturbed soil prior to start of
any construction.
7. Upon approval by the District of the draft
maintenance agreement and buffer declaration,
the documents shall be executed and recorded at
the County on the deed. Submit certified copies
to the District within 60 days of notice of District
approval of draft agreements.
8. Stabilization must be initiated immediately to
limit soil erosion on any portion of the site when
construction activity has permanently ceased or
will not resume for a period exceeding fourteen
(14) calendar days. Stabilization must be
completed no later than fourteen (14) calendar
days after the construction activity in that portion
of the site has ceased. Stabilization must be
completed no later than twenty-four (24) hours
after the construction activity has ceased in that
portion of the site within two hundred (200)
lineal feet of and draining to a wetland,
waterbody, a discernable surface drainage
feature or a stormwater system inlet.
9. Notify District Administrator after completion of
work for final inspection and return of surety.
Exhibits: 1. Permit Application dated 1/22/19, received 1/22/19.
2. Permit Fee ($250) and Surety ($500) received from Brent Jensen, on
1/22/19.
3. Variance Exhibit Survey (1 sheet) prepared by Carlson McCain, last
revised 1/18/19, received 1/22/19.
4. Grading Permit Application for the City of Scandia, received 1/22/19.
5. Zoning Variance Application for the City of Scandia, received
1/22/19.
Permit Application No. 19-003 Jensen Driveway & Residence, German Lake
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6. Notice of Decision under the MWCA, signed 10/16/18, received
2/28/19.
7. Wetland Delineation Report prepared by Kjolhaug Environmental
Services, dated 9/19/18, received 2/28/19.
Findings: 1. Description – The proposed project entails constructing a new
driveway at 11245 218th St. N, for the purpose of reducing necessary
grading and tree removal associated with current site access. This
driveway will serve a future new home, details of which have yet to
be provided.
2. Stormwater Management – Stormwater management will not be
required for construction of the driveway. However, stormwater
management will be required for the proposed residence in accordance
with the District’s Small Residential Project Stormwater Worksheet.
3. Erosion & Sediment Control – A sediment and erosion control plan
must be provided and must include a temporary rock construction
entrance, silt fencing downstream of disturbed areas, revegetation
specifications, and a construction implementation schedule.
4. Buffers – The location of the proposed driveway is within the required
75-feet buffer of the delineated wetland on the north edge of the
parcel. Per District Rule 4.5.2, creation of impervious area is
prohibited within this buffer. However, the overflow of the wetland
is near the delineated boundary such that the driveway would not be
tributary to the wetland. Given this, it is recommended that the
proposed driveway be shifted to the east to a distance of ½ the buffer
width (32.5-feet) while still remaining on the topographic saddle.
This would balance the benefits of wetland and lake buffers
(increasing the driveway distance from German Lake as compared to
existing conditions) and be within the buffer width averaging
standards of District Rule 4.3.7.
5. Floodplain – The 100-yr flood elevation of German Lake is 958.7
(FEMA). The proposed driveway is not within the 100-yr flood zone.
The (future) proposed home lowest floor elevation will need to
comply with District freeboard requirements.
6. Wetland Management – The proposed plan does not include fill within
wetlands, however, a Manage 2 wetland drains east to German Lake
over a topographic saddle on which the driveway is proposed. The
proposed culvert must not be placed below the existing overflow
elevation of the wetland. Additional culvert details are required to
Permit Application No. 19-003 Jensen Driveway & Residence, German Lake
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verify no indirect wetland impacts.
Board Action: The CMSCWD Board conditionally approved this application on
February 13th, 2019 pending receipt of the above items.