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Engineering Standards and Detail Specifications Policy Adopted 10-04-2022 2019 Engineering Standards and Detail Specifications Adopted April 16, 2019 DRAFT Proposed amendment October 4, 2022 City of Scandia 14727 209th St. N. Scandia, Minnesota 55073 Phone: 651 433-2274 Fax: 651 433-5112 www.ci.scandia.mn.us 2 PURPOSE This document establishes engineering standards and detail specifications for public and private improvements in new subdivisions within the City of Scandia. It has been adopted by reference in Ordinance No. 128 adopting Chapter 3 (Subdivision Regulations) of the City of Scandia Development Code. The standards of this document supplement the Minimum Design Standards contained in the Subdivision Regulations. Adherence to these standards will help assure that new subdivisions will contribute toward and attractive orderly, stable a livable and safe community. Compliance will help assure the quality of design and construction of new streets, utilities and other infrastructure in the city of Scandia, and help prevent future problems and unnecessary maintenance expense in the future. These guidelines will be updated from time to time to reflect new materials and practices, subject to approval by the City Council. CONTENTS Engineering Product/ Material Requirements ......................................................................3 Engineering Design Requirements ......................................................................................7 Project Plan Requirements ............................................................................................11 Building Permit Requirements ...........................................................................................16 3 ENGINEERING PRODUCT MATERIAL REQUIREMENTS The following list of items provides product material requirements for development projects in the City of Scandia. The product material requirements have been established and adopted by the City to provide consistency in the materials installed for rural and Village Core streets, storm sewer, storm sewer, sanitary sewer, and watermain. Material product requirements identify items that are consistent with today’s engineering and construction practices, and provide for consistent maintenance practices. STREET GENERAL REQUIREMENTS (1) Proposed streets shall conform to the state, county or local road plans or preliminary plans as have been prepared, adopted and/or filed. (2) Private streets and reserve strips shall be prohibited and no public improvements shall be approved for any private street. All streets shall be dedicated for public use. (3) The arrangement, character, extent, width, and location of all streets shall be considered in relation to existing and planned streets, shall provide for reasonable traffic circulation and traffic calming, shall provide for reasonable mobility of pedestrians and non-motorized transportation, and shall be appropriately located in relation to topography, run-off of storm water, convenience and safety, and proposed uses of the land to be served. Access shall be given to all lots and portions of the tract in the subdivision and to adjacent unsubdivided parcels unless the topography clearly indicates that such connection is not feasible. Reserved strips and land-locked areas shall not be created. (4) Where adjoining areas are not subdivided, but may be subdivided, the arrangement of streets in a new subdivision shall make provisions for the proper projection of streets into adjoining areas by carrying the new streets to the boundaries of the new subdivision at appropriate locations. Streets must be paved to the subdivision boundary except when this requirement is modified or waived by the City Council for good cause shown. (5) Local streets shall be designed and aligned to discourage their use by non-local traffic, to permit efficient drainage, and to require the minimum number of streets necessary to provide convenient and safe access to property. (6) Neighborhoods shall be interconnected where possible to provide for emergency access, convenience, dispersal and circulation of traffic and to foster community cohesiveness. Half or partial streets will not be permitted, except where essential to reasonable subdivision of a tract in conformance with the other requirements and standards of these regulations and where, in addition, reasonable assurance for dedication of the remaining part of the street can be secured. (7) Whenever a tract to be subdivided adjoins an existing half or partial street, the part of the street within such tract shall be platted and dedicated if the dedication results in a reasonable subdivision design for the area. (8) Dead-end streets shall be prohibited except as stubs to permit future street extension into adjoining tracts or when designed as cul-de-sac streets. (9) The street arrangements shall not be such as to cause hardship to owners of adjoining property in platting their own land and providing convenient access to it. 4 STREET – DESIGN All streets shall conform to the Engineering Standards and Detail Specifications as adopted by the City Council as may be amended, and the following standards: (1) Streets shall be graded in accordance with a plan approved by the City engineer. (2) All streets shall be paved with a bituminous surface meeting the Engineering Guidelines/ Standard Detail Specifications. New streets with gravel surfaces are prohibited. (3) New streets within the Village Neighborhood (VN) or Village Mixed Use (VMU) zoning districts shall comply with the standards for Urban Design streets unless otherwise approved by the City. All other streets shall comply with the standards for Rural Design streets. Minimum right-of-way widths and pavement widths for each type of public street or road shall be as follows: Urban Design Type of Street Minimum Right-of-Way Width Minimum Roadway Width (to face of curb) Minor Arterial 120 feet 44 feet Collector 100 feet 44 feet Local 66 feet 32 feet Cul-Du-Sac 120 feet (60 feet radius) 90 feet (45 feet radius) Rural Design Type of Street Minimum Right-of Way Width Minimum Roadway Width (edge of pavement) Shoulder Width (each side) Minor Arterial 120 feet 24 feet 8 feet Collector or Commercial-Industrial Street 100 feet 24 feet 8 feet Local 60 feet 24 feet 4 feet As determined by the City Engineer as necessary to support road structure, address anticipated or projected on street parking needs, or other related improvement relative to right of way use. Cul-de-Sac 120 feet (60 feet radius) 90 feet (45 feet radius) 4 feet As determined by the City Engineer as necessary to support road structure, address anticipated or projected on street parking needs, or other related improvement relative to right of way use. (4) Where a subdivision abuts or contains an existing street of inadequate width, sufficient additional width shall be provided to meet the above standards. (5) Additional right-of-way and roadway widths may be required to promote public safety and convenience when special conditions require it or to provide parking space in areas of intensive use. Additional width may also be necessary due to topography in order to provide adequate earth slopes. 5 (6) An obstacle clear free zone shall be provided adjacent to the roadway in accordance with the standards of the Minnesota Department of Transportation Road Design Manual. (7) Concrete curb and gutter shall be constructed on both sides of urban designed streets and in areas where the road centerline grade exceeds 4%. (8) For rural design roadways, the in-slopes of the ditches shall be at 1:4 (rise over run) and back slopes of the ditch shall be at 1:3 (rise over run). The ditch bottom shall be 4 feet wide unless suitable erosion control can be provided. Ditch approaches such at intersections or driveways shall be 1:6 (rise over run). (9) For urban design roadways, all boulevards shall have topsoil (black dirt) at least 4 inches in thickness placed on them and then seeded or sodded. STREET ALIGNMENT AND GRADES (1) Street jogs with centerline offsets of less than 150 feet shall not be allowed. (2) When connecting street lines deflect from each other at any one point by more than 10 degrees, they shall be connected by a curve with a radius of not less than 200 feet. (3) The angle formed by any intersection of streets shall not be less than seventy (70) degrees, with 90 degree intersections preferred. (4) Intersections having more than 4 streets converging at a single intersecting point shall be prohibited. (5) Roadways of street intersections shall be rounded by a radius of not less than 20 feet. Roadways of alley-street intersections shall be rounded by a radius of not less than 10 feet. Corners at the entrances of turn-around portions of the cul-de-sacs shall be rounded by a radius of not less than 30 feet. (6) Centerline gradients shall be at least 0.25 % and grades shall not exceed 6%. If the street includes concrete curb and gutter the centerline gradient shall at least be at least 0.50 %. (7) Different connecting street gradients shall be connected with vertical curves. Minimum length of these curves shall be in accordance with current “Stopping Sight Distance” criteria as established by American Association of State Highway and Transportation Officials (ASHTO) and as adopted by the Minnesota Department of Transportation (Mn/DOT). STREET MATERIALS •Street Section (ALL) -Subgrade ........ . ................................... minimum 12 inch Select Granular Borrow -Base ............ .................................................. minimum 8 inch Aggregate, Cl. 5 -Fabric ............ .................................................. Type V (non-woven), 4.5oz/sq yd -Bit. Wear Course ................................... 1.5 inch – SPWEA330C Wearing Course -Bit Base Course ............................... 2.5 inches – SPNWEB330C Wearing Course -Draintile .. 4” PVC/HDPE Perforated with trench rock and geotextile wrap -Commercial Pavement. Thickness & Mix Design ........................................ varies •Shoulder -Material .................................................................. 4” Aggregate Base Cl.2 •Boulevard -Topsoil ........... .............. minimum 6 inch, conforming to MnDOT Spec 3877.2A -Treatment – Sod .............................................. conforming to MnDOT Spec. 3878 6 -Treatment – Seed ............................... conform to MnDOT Spec 3876, types vary •Curb -Type – Concrete Curb & Gutter Design .... B618 and Surmountable (Residential) ........................................................................ B618 (Commercial) -Bituminous Curb ................................................................................ Not Allowed •Street Name Signs – Multi Lane Speed Limits Less Than 40 MPH -Single sided ........................ 080” aluminum 9-inch plates w/1.5” corner radius -Lettering ............. 6” for street names and 3” for street suffix and block No. -City Logo ............ 6” on left side of plate, 6” arrow on right (if applicable) -Reflective sheeting ............................................................... Diamond Grade DG3 -Public Streets ................................................. Clearview One font, 3/8” margins ............................................. White lettering on green background -Private Streets .............................................. Clearview One font, 3/8” margins, ............................................... White lettering on blue background -Border .......................................................................... White ½” E Series -Sign Assembly ....................... 2” Cherry Mate Rivets with 1-3/4” PVC spacer -Sign Attachment ................................... 3/8” steel Drive rivets with nylon washers -Posts ... 12’ Pre-Punched 2 inch Telespar, 12 GA with pyramid rain cap -Post Sleeve .......................................... 2 ½ inch Omni, 18 inches long, 12 GA -Post Anchor Assembly ............................ 2 ¼ inch Telespar, 3.5 feet long, 12 GA •Signing and Striping -Street Signs (informational and regulatory) ............................................................ -Reflective sheeting ............................................................... Diamond Grade DG3 -Sign Attachment ................................... 3/8” steel Drive rivets with nylon washers -Posts ............................................ Pre-Punched 2 inch Telespar, 12 GA ....................... 10’ for stop and other regulatory/information signs ... 12’ for street sign/stop sign combination with pyramid rain cap -Post Sleeve .......................................... 2 ½ inch Omni, 18 inches long, 12 GA -Post Anchor Assembly ............................ 2 ¼ inch Telespar, 3.5 feet long, 12 GA -Sign Attachment .............................................................. 3/8” steel Drive rivets -Striping .................................................................................... Multi Comp All Telespar posts to be bolted to post sleeve/post anchor with 5/16” corner bolts and 5/16” nylon lock washers SIDEWALK/ TRAIL MATERIALS •Sidewalk Section -Base ............ .................................................................. 6 inch Aggregate, Cl. 5 -Concrete ......... ......................................................... 6 inch – Mix Number 3F52A -Width (min) .... ............................................................................................. 6 foot •Trail Section -Base ............ .................................................................. 6 inch Aggregate, Cl. 5 -Bituminous Wear Course ......................... 3 inch – SPWEA230B Wearing Course 7 - Width (min) ... ........................................................................................... 10 foot STORM SEWER / CULVERT MATERIALS •Main Pipe -Material ....................................................................................... RCP Only -Depth and Class ........................................................................................... Varies -Culvert Material ......... CMP or RCP (rural driveway only) /RCP (street crossing) •Manhole -Type ............ ................................................................................... Precast, RCP -Concrete Rings ................................................... 2 minimum, 8” height maximum -Chimney seal ......................................................... Infi-Shield or approved equal -Minimum MH depth ................................................................................... 3.5 feet -Sump Depth .................................................................................................... 4’ -Type of Casting .............................................. R-1642-B, Stamped “Storm Sewer” •Catch Basin -Type ............ ................................................................................... Precast, RCP -Concrete Rings ................................................... 2 minimum, 8” height maximum -Chimney seal .. ......................................................... Infi-Shield or approved equal -Minimum CB Depth to Invert ..................................................................... 3.5 feet -Sump Depth ............................................................ 4’ in CB upstream of pond -Type of Casting ..................................................................... R-3067-V (Standard) ....................................................... and R-3067VB (Low Points) SANITARY SEWER MATERIALS (for development areas with community collection systems) •Main Pipe -Material ................................................................................................ PVC -Class ............ Depth to 18 feet .............................................................................. SDR 35 Depth 18 feet to 26 feet .................................................................. SDR 26 Depth > 26 feet ..................................................... As required by Engineer •Manhole -Type ............ ................................................................................... Precast, RCP -Wrap each MH barrel joint with 12” mastic seal or ram-nek in barrel joint 8 -Type of Casting ........................................... R-1642-B Stamped “Sanitary Sewer” -Outside drop Material .............................................................. DR 18 DIPS C-900 -Concrete Rings .................................................. 2 minimum, 8” height maximum -Chimney seal ......................................................... Infi-Shield or approved equal •Service Pipe – 4 inch standard -Material ................................................................................................ PVC -Class ............ ..........................schedule 40, 150 psi pressure rating ASTM 2241 •Cleanout / Riser Pipe - 4 inch standard -Material ............................................................................................... PVC -Class ............ ..........................schedule 80, 150 psi pressure rating ASTM 2241 WATERMAIN MATERIALS (for development areas with community supply and distribution systems) •Main Pipe -Material ........................................................ Class 52, DIP (poly wrapped) -Alternate Material (Engineer review) .............. 4” – 12” PVC DR 18 DIPS C-900 -Fittings ........... .......................................... DIP, Epoxy Coated, U.S. Manufacture -Fitting Bolts ... ......................................................................................... Cor-Blue -Restraints ....................................................................................... Mega-Lug -Tracer Wire (For PVC) Min. No. 12 AWG - Copper Clad Steel rated to 30 volts •Hydrant -Type ............ .......................................................... Waterous Pacer WB-67-250 -Operating Rod .................................................................................... Heavy Duty -Body bolts ...... .................................................................................Stainless Steel Snake Pit Magnetized Tracer Box by Copperhead Industries, Concrete/Driveway Tracer Box Model, or approved equal if PVC is used •Valves -Type 12” or less ............................ Resilient Wedge Gate Valve (AWWA C515) -Manufacturer .. Waterous, American Flow Control 2500 Series or approved equal -Valve Box ............................................... 4” through 12” – Tyler 6860 Series -Gate Valve Box Adaptor Plate ...¼” Steel w/protective coating by Adaptor, Inc. or approved equal. -Valve Body Bolts .............................................................................Stainless Steel -Extension Rod (single piece steel) ................. Top Nut - 2’ below finished surface •Residential Service Pipe -Service Size ........................................................................ 1” to 2.5” Diameter 9 -Service Material ...................................................... Type “K” Copper to curb box ............................................... HDPE C901, DR11 w/ Tracer Wire ........................... Long stainless steel saddles for PVC watermain -Type of Corporation Stop ............Mueller ball valve. H-25000 or approved equal -Type of Curb Stop ........................ Mueller ball valve H-25154 or approved equal -Type of Curb Box ......................................... Mueller H-10300 or approved equal .................................................................. Extension rods required -Pigtail Length ................................................................ 10 feet with crimped end ENGINEERING DESIGN REQUIREMENTS The following list of items provides engineering design requirements for development projects in the City of Scandia. The requirements have been established and adopted by the City to provide consistency with today’s engineering and construction practices. STREET DESIGN REQUIREMENTS •Street Width and Rights-of-way -Street Widths & Rights-of-Ways are indicated in the Development Code, Chapter 3 (Subdivision) of the City of Scandia. •Street Section (ALL) The Standard Street Section shall meet the minimum requirements for Local and Arterial/Collector Streets as follows: -Local/residential low volume roadways (Urban Design and Rural Design) - 1.5 inches bituminous wearing course 2.5 inches bituminous wearing course 8 inches aggregate base class 5 12 inches select granular borrow Geotextile Fabric, Type V, non-woven Subgrade as approved by City Engineer 10 -Arterial/Collector medium to high volume roadways and commercial roadways - 1.5 inches bituminous wearing course 2.5 inches bituminous wearing course 10 inches aggregate base class 5 12 inches select granular borrow Geotextile Fabric, Type V, non-woven Subgrade as approved by City Engineer -Additional street section requirements may be required based on traffic type and volume anticipated for the proposed roadway. •Boulevard -Width .............................................................................................. varies -Sidewalk Width .............................................................................................. 6 feet -Bituminous Trail Width ............................................................................... 10 feet •Entrances (Single family residential) -Driveway – Width .................................................................... 12 feet – Minimum ........................................................................ 24 feet – Maximum ………...... ........... Cul-de-sac widths to be reviewed by City Staff ….All driveways are to meet minimum side yard setbacks - 5 feet -Driveway location – 50 feet from the curb of an intersecting street -One access per Residential Property unless additional access approved by City. •Commercial Entrances -Driveway width ........................................................................ 32 feet - Maximum ......................... Driveway location requires Engineering approval •Street Miscellaneous -Crown ............ ............................................................................................... 2.5% -Minimum percent of grade ............................................................................. 0.5% -Maximum approach grade at intersection for 50’ distance ............................ 2.0% -Maximum percent of grade ............................................................................ 6.0% -Diameter of Cul-de-sac (no islands allowed) ............................................. 100 feet -Minimum % of grade around Cul-de-sac Curb Flow line ............................. 0.5% -Minimum intersection radii for local and Arterial streets ............................ 20 feet -Maximum length of Cul-de-sac ............................... 600 feet Urban Development ....................................................... Varies for Rural Development -Minimum Radius for Cul-de-sac return required ......................................... 30 feet -Temporary Cul-de-sac at plat line ..................................................................... yes •Horizontal Street Alignment -When a horizontal street centerline deflections at any one point, by more than 10 degrees, a horizontal curve shall be introduced into the alignment with radius no less than 100 feet in length. -Street “jogs” or offsets shall be spaced at least 150 feet, centerline of street to centerline of street for minor streets. Major street intersections shall not be offset. 11 -Intersecting streets shall have centerlines that intersect at a single point, with the angle between the intersecting street centerlines of no less than 80 degrees and no more than 100 degrees. 90 degree intersections are preferred. •Vertical Street Alignment -Vertical street centerline alignment with different connecting gradients shall be connected with vertical curves. Minimum length, in feet, of these vertical curves shall be thirty (30) times the algebraic difference in the percent of grade of the two adjacent slopes. •Sign requirements -All signs shall conform to the Minnesota Manual on Uniform Traffic Control Devices, current edition and subsequent revisions, and Mn/DOT Standard Specifications for Construction, current edition, Section 2564. -Sign sheeting shall meet current Federal regulatory Retroreflectivity requirements. •Mailbox requirements ....... COORDINATE LOCATIONS WITH THE POSTMASTER .......................... Cluster mailboxes to be approved by postmaster. •Private Utilities .... Gas, electric, telephone, cable, etc. constructed in joint trench. Private utility street crossings shall be made inside of 4” – 6” Sch. 40 conduit installed during street construction. Crossing locations to be determined by the private utility and submitted to the City on a map for review and approval. STORM SEWER DESIGN REQUIREMENTS All storm sewer shall be designed, at a minimum, using the Rational Method for storm sewer design and MnDOT Regional Atlas 14 Intensity-Duration-Frequency (IDF) curves for Washington County. Alternatively, storm sewer can be designed using the SCS Curve Number Method, Atlas 14 rainfall depth and MSE 3 nested distribution. All stormwater best management practices shall be designed using the SCS Curve Number Method, Atlas 14 rainfall depth and MSE 3 nested distribution to ensure that Post development peak flow rates will not exceed existing peak flow rates for the 2-year (2.8 inches in 24 hours), 10-year (4.1 inches in 24 hours), and 100-year (6.9 inches in 24 hours) storm events. •Main Pipe -Minimum pipe diameter .............................................................................. 12 inch -Minimum culvert diameter .......................................................................... 15 inch -Minimum culvert length ............................................................................... 24 feet -Maximum culvert length .............................................................................. 30 feet -Apron and Trash Guard requirements ................................................. All Culverts •Manhole 12 -Minimum diameter ......................................................................................... 4 feet -Minimum Build height ................................................................................ 3.5 feet •Catch Basin -Minimum pipe cover ...................................................................................... 2 feet -Sumps ................................................. 4’ in last CB or MH prior to outlet •Design -Rainfall frequency or storm sewer design ..................................................... 10 yr. -Minimum storm sewer design velocity ........................................................... 3 fps -Maximum storm sewer discharge velocity .................................................. 5.5 fps -Design frequency for stormwater best management practices .................... 100 yr. -Design 100-year flood level below adjacent basement floor elevations ..... 2.0 feet -Emergency overflow swale below building openings ............................... 1.0 foot -Maximum basin side slope ................................................................................. 3:1 -Minimum detention basin depth ................................................................. 4.0 feet -Maximum detention basin depth ............................................................... 10.0 feet -Minimum swale grade .................................................................................... 2.0% SANITARY SEWER DESIGN REQUIREMENTS •Manhole -Maximum Manhole Spacing ...................................................................... 400 feet -Maximum inlet/outlet elevation difference .................................................... 2 feet -Minimum depth of Manhole ........................................................................ 10 feet -Outside drop ........................................................................... 2.0 feet minimum •Service -Extend from mainline pipe to property line with cleanout •Cleanout -Extend to 8’ bury at property line WATERMAIN DESIGN REQUIREMENTS •Main Pipe -Minimum diameter ........................................................................................ 8 inch -Maximum Length of Dead Ends ................................................................ 600 feet -Air Release measures ................................................................................. Hydrant -Minimum Cover ............................................................................................. 8 feet -Side of Street ………………………North and East side of centerline preferred •Hydrant -Depth ............ ................................................................ 8’-6” Bury (8 feet cover) -Spacing .......................................................... 250’R to cover Building Pad 13 -Gate valve on 6” Hydrant leads ....................................................................... Yes -Supply two (2) Spring Mounted snow flags per hydrant. One to be installed on new hydrant and one to be delivered to the City. •Valves -Maximum distance between Valves on Trunk Mains ................................ 600 feet -Maximum No. house services between Valves on Lateral Mains ...................... 20 •Residential Service Pipe -No splices in services are allowed •Irrigation Service Pipe -Minimum diameter .............................................................................................. 4” 14 PROJECT PLAN REQUIREMENTS PLAN SHEET FORMAT REQUIREMENTS 1. The maximum plan sheet size shall be 22” x 34”. 2. The electronic file must be in AutoCAD.DWG format. 3. The electronic file must have layered designations for various items and text as indicated by the table named Minimum Layering Requirements. 4. The intent of the layering requirements is to separate various items of the drawing. The general concept of the layering is to separate; • Proposed features from existing features • Proposed text labeling from existing text labeling • Different utilities of the construction project • Proposed lateral and trunk features from utility services 5. Additional layering from that indicated by the Minimum Layering Requirements is encouraged, and can be completed according to your needs and/or company policy. 6. All electronic files must be accompanied by a “layer description list” that clearly identifies the elements of each layer or level. 7. Horizontal control of the Plans must be on Washington County Coordinate System. 8. Vertical control of the Plans must be on the City’s Benchmark System. Minimum Layering Requirements: Layer/ Level Items 1. Legend, bar scales, north arrows, headings, and sheet numbers, match lines and text, sheet references, and other general information 2. Removals, hatching, shading, etc. 3. Existing underground utilities (gas, electric, telephone, cable TV) 4. Existing property lines, right-of-way lines and easements 5. Existing sanitary sewer and services 6. Existing sanitary sewer text 7. Existing watermain and services 8. Existing watermain text 9. Existing storm sewer 10. Existing storm sewer text 11. Existing draintile and draintile service stubs 12. Existing draintile text 13. Existing curb line or edge of pavement 14. Text for miscellaneous existing items 15. Proposed sanitary sewer and appurtenances 16. Proposed sanitary sewer text 17. Proposed watermain and appurtenances 18. Proposed watermain text 19. Proposed sanitary sewer and watermain services 20. Proposed sanitary sewer and watermain service text 21. Proposed storm sewer and appurtenances 15 22. Proposed storm sewer text 23. Proposed draintile and appurtenances 24. Proposed draintile text 25. Proposed curb lines, walks, trails, etc. 26. Proposed street construction text 27. Centerline 28. Proposed vertical alignment 29. Proposed vertical alignment text For grading plans or when applicable: 30. Existing contours 31. Existing contour text 32. Proposed contours 33. Proposed contours text As noted previously, additional layering is encouraged. However, placing similar items on multiple layers is not acceptable. PLAN REQUIREMENTS I. Title Sheet – With Location Map II. Sheet Index Map III. Legend, Typical Section IV. Details V. Grading, Drainage, and Erosion Control Plans A. Show building Pads with building location. Define location of house and garage. B. Indicate NWL and 100-year HWL, Low floor elevations, and emergency overflow elevations. VI. Storm Sewer and Street Plan Sheets: A. Plan and Profile shall be shown on the same sheet B. The following information shall be shown: (North arrow up or to the right on all sheets) 1. Scale: 1”=50’ horizontal and 1”=10’ vertical Maximum sheet size 22” x 34” 2. Sizes of storm sewer pipe. 3. Types of storm sewer pipe, class of pipe. 4. Lengths of storm sewer pipe. 5. Sizes and types of manholes and catch basins. 6. Proposed grades of storm sewer pipe. 7. Proposed drainage swale locations and elevations. 16 8. Elevations on all inverts and elevations of castings of all storm sewer structures. 9. Arrows indicating the direction of flow on the storm sewer plan views. 10. Number of each storm sewer structure on both plan and profile views. 11. Proposed watermain and sanitary sewer shown in plan and profile views, dashed line. 12. Proposed storm sewer pipe crossings on the storm sewer profile views. 13. Existing profile over storm sewer pipe. 14. Finished profile over storm sewer pipe. 15. Show concrete walks and bituminous paths. 16. Finished centerline street elevations every 50 feet. 17. Drainage flow arrows at street intersections. 18. Street names. 19. Lot and block numbers. 20. Existing and proposed easements/right-of-ways. 21. Centerline stationing needs to be shown. VII. Street Light Plan – Standard street lights are “Traditional Coach Lantern” (Connexus Energy) and “Traditional”( Xcel Energy) Luminaires. The Developer can upgrade street lights to an “Acorn”(Xcel and Connexus) style. Any style of street lighting that is installed shall use LEDs for illumination. All street lights are to be furnished, paid, and installed by the Developer, with the City taking over the maintenance and repair costs after the system is approved by the Engineer and accepted by the City. VIII. Street Signage and Pavement Marking Plan 1. All signing and pavement markings are to be in accordance with the Minnesota Manual on Uniform Traffic Control Devices (MMUTCD), 2001 Edition, and Mn/DOT Specification 2564. IX. Sanitary Sewer and Watermain Plan Sheets: A. Plan and profile sheets shall contain both sanitary sewer and watermain on the same sheet. B. The following information shall be shown: (North arrow up or to the right on all sheets.) 1. Scale: 1”=50’ horizontal and 1”=10’ vertical Maximum sheet size 22” x 34”. 2. Size of proposed mains. 3. Type of mains and class of pipe. 4. Length of mains. 5. Size and type of manholes. 6. Proposed grade of sewer mains. 7. Elevations of inverts of all sanitary sewer stubs, @ MH and stub end. 8. Arrows indicating the direction of flow on the sanitary sewer plan views. 9. Number of each sanitary sewer structure on both plan and profile views. Stationing of sanitary sewer structures on profile view. 10. Proposed main line pipe crossings on the profile views. 11. Proposed storm sewer shown in plan and profile views, dashed line. 12. Hydrant, valve and fitting locations on the plan view. 17 13. Existing profile over main line pipe. 14. Finished profile over main line pipe. 15. Street names 16. Lot and block numbers. 17. Location of all existing utilities. 18. Existing and proposed easements. 19. Centerline stationing needs to be shown. As-Built/Record Drawings: After construction is completed, two printed sets of as-built construction record drawings are to be prepared and provided to the City by the Developer. The final record drawings must also be submitted in electronic format in accordance with the Plan Requirements. The record drawings shall indicate all changes from the as-bid plans. The contractor and construction year shall also be noted on the record plan drawings. The following are specific requirements for each element constructed with the project. Sanitary Sewer: As-built elevations of the rim and invert of each structure must be surveyed. The elevations shall be recorded and revised to the nearest 0.01’. If pipe elevations change more than 1 foot, the changed portion of the profile should be redrawn. The percentage of grade between manholes should be changed accordingly and recorded to the nearest 0.01%. Distance between manholes should be changed on both the plan and profile. The distance shall be measured from center of casting to the nearest 1’. Length of service risers shall be revised to the nearest 1’. Water Main: Any change in elevation of more than 1-foot should be noted on the profile. Any change in location of a main, hydrant, valve, etc. should be corrected on the plan as well as any additions. Each gate valve must have two or more ties recorded on the record plan recorded to the nearest 0.1’. The location of water main fittings shall be noted on the record plans. All top of hydrant elevations shall be recorded to the nearest 0.01’. The manufacturer, type, size, and class of piping, fittings, valves and boxes, brass, stop boxes shall be noted on the record drawings. Services: Service wye locations accurate to the nearest foot. The end of the service must be located with two or more ties. If a water service is installed in the same trench with the sanitary sewer the ties should be to the curb box. Service ties shall be recorded to the nearest 0.1’. Ties to drain tile service stub and clean-outs, recorded to the nearest 0.1’. Service invert elevations at R/W line, recorded to the nearest 0.1’. 18 Storm Sewer: As-built elevations of the rim and invert of each structure must be surveyed, which includes storm sewer manhole and catch basin casting/inlet tops and inverts, flared end section inverts, and any other structure elevations shown on the as-bid plan. The elevations shall be recorded and revised to the nearest 0.01’. If pipe elevations change more than 1 foot, the changed portion of the profile should be redrawn. The percentage of grade between structures shall be changed accordingly and recorded to the nearest 0.01%. Any change in distance between structures or changes in bends or aprons must be changed on the plan sheet and profile. The distance shall be measured from center of casting/end section to the nearest 1’. Streets: Drawings should reflect any changes made. Any subgrade corrections that were made in addition to what is noted in the construction documents shall be noted. Special Structures: Record plans on special structures such as lift stations, pump houses, treatment plans, etc. should be include as-built elevations of critical piping, slabs, etc. as well as any changes which may have occurred during construction. 19 ISSUANCE OF BUILDING PERMITS •Building Permits, in a platted subdivision, will not be issued until the public improvements are completed, including public sanitary sewer, water main, services, private utilities (gas, electric, telephone, and cable television), concrete curb and gutter, aggregate base, bituminous base, and storm water management basins are constructed, street signs installed, and street lights installed. •Building permits will not be issued until the developer has installed silt fence along the back of curb on all streets and along the back property lines for all lots. Side lot line silt fence is required adjacent to lots that have been finished graded, and have established turf. •The individual builders shall maintain silt fence throughout home/building construction. •Street sweeping is to be performed on a weekly basis, at the developer’s cost, until 75% of the homes in the subdivision are constructed, or for a period of two years after the placement of the bituminous base course. •The bituminous wearing course is to be constructed after a minimum of one frost cycle season and 75% of the homes are constructed, or three years after placement of the bituminous base course.