Laserfiche WebLink
K:\TWC_LDEV\Scannell\arden hills, mn\3 Design\CAD\plansheets\C5-STORM SEWER PLAN.dwg August 21, 2020 - 1:04pmSHEETNOT FOR CONSTRUCTIONBRJBRJ/LEC71155-200422020 KIMLEY-HORN AND ASSOCIATES, INC.767 EUSTIS STREET, SUITE 100, ST. PAUL, MN 551141 CITY SUBMITTAL 5/1/20202 CITY SUBMITTAL 7/20/20203 WATERSHED UPDATE 7/24/20204 WATERSHED UPDATE 8/21/2020STORMWATER MANAGEMENT PLAN NOTES1. ALL WORK SHALL BE PERFORMED IN ACCORDANCE WITH THE CITY OF ARDEN HILLS,SPECIFICATIONS AND BUILDING PERMIT REQUIREMENTS.2. CONTRACTOR TO CALL GOPHER STATE CALL ONE @ <1-800-252-1166> AT LEAST TWOWORKING DAYS PRIOR TO EXCAVATION/CONSTRUCTION FOR UTILITY LOCATIONS.3. STORM SEWER PIPE SHALL BE AS FOLLOWS:RCP PER ASTM C-76HDPE: 0" - 10" PER AASHTO M-252HDPE: 12" OR GREATER PER ASTM F-2306PVC SCH. 40 PER ASTM D-3034WHEN STORM SEWER CROSSES ABOVE WATERMAIN: STORM SEWER (18" ANDSMALLER) SHALL BE PVC SHC 40 PER ASTM D-1785; PROVIDE 18" MINIMUMVERTICAL CLEARANCE OUTER EDGE TO OUTER EDGESTORM SEWER FITTINGS SHALL BE AS FOLLOWS:RCP PER ASTM C-76, JOINTS PER ASTM C-361, C-990, AND C-443HDPE PER ASTM 3212PVC PER ASTM D-3034, JOINTS PER ASTM D-3212WHEN STORM SEWER CROSSES ABOVE WATERMAIN: STORM SEWER (18" AND SMALLER) FITTINGS SHALL BE PVC SHC 40 PER ASTM D-2665; PROVIDE 18" MINIMUMVERTICAL CLEARANCE OUTER EDGE TO OUTER EDGE4. CONTRACTOR TO FIELD VERIFY THE LOCATIONS AND ELEVATIONS OR EXISTINGUTILITIES AND TOPOGRAPHIC FEATURES PRIOR TO THE START OF SITE GRADING. THECONTRACTOR SHALL IMMEDIATELY NOTIFY THE PROJECT ENGINEER OF ANYDISCREPANCIES OR VARIATIONS.5. SUBGRADE EXCAVATION SHALL BE BACKFILLED IMMEDIATELY AFTER EXCAVATION TOHELP OFFSET ANY STABILITY PROBLEMS DUE TO WATER SEEPAGE OR STEEP SLOPES.WHEN PLACING NEW SURFACE MATERIAL ADJACENT TO EXISTING PAVEMENT, THEEXCAVATION SHALL BE BACKFILLED PROMPTLY TO AVOID UNDERMINING OF EXISTINGPAVEMENT.6. CONTRACTOR SHALL BE RESPONSIBLE FOR ALL HORIZONTAL AND VERTICAL CONTROL.7. CONTRACTOR SHALL EXCAVATE DRAINAGE TRENCHES TO FOLLOW PROPOSED STORMSEWER ALIGNMENTS.8. ALL EXCESS MATERIAL, BITUMINOUS SURFACING, CONCRETE ITEMS, ANY ABANDONEDUTILITY ITEMS, AND OTHER UNSTABLE MATERIALS SHALL BECOME THE PROPERTY OFTHE CONTRACTOR AND SHALL BE DISPOSED OF OFF THE CONSTRUCTION SITE.9. REFER TO THE UTILITY PLAN FOR SANITARY SEWER MAIN, WATER MAIN SERVICELAYOUT AND ELEVATIONS AND CASTING / STRUCTURE NOTATION.10. CONTRACTOR IS RESPONSIBLE FOR CONSTRUCTION OF PAVEMENTS AND CURB ANDGUTTER WITH SMOOTH UNIFORM SLOPES TO PROVIDE POSITIVE DRAINAGE.11. CONTRACTOR TO PROVIDE 3" INSULATION BY 5' WIDE CENTERED ON STORM PIPE IFLESS THAN 4' OF COVER IN PAVEMENT AREAS AND LESS THAN 3' OF COVER INLANDSCAPE AREAS.12. ALL STORM SEWER CONNECTIONS SHALL BE GASKETED AND WATER TIGHT INCLUDINGMANHOLE CONNECTIONS.13. ALL STORM SEWER PIPE SHALL BE AIR TESTED IN ACCORDANCE WITH THE CURRENTPLUMBING CODE.14. ALL PORTIONS OF THE STORM SEWER SYSTEM LOCATED WITHIN 10 FEET OF THEBUILDING OR WATER SERVICE LINE MUST BE TESTED IN ACCORDANCE WITH MINNESOTARULES, CHAPTER 474, SECTION 1109.15. ALL STORM PIPE ENTERING STRUCTURES SHALL BE WATERTIGHT OR BE OF FLEXIBLECOMPRESSION JOINTS. JOINT CONNECTIONS SHALL BE FLEXIBLE WATER STOPS,RESILIENT CONNECTORS, OR OTHER FLEXIBLE SYSTEMS APPROVED BY THE ENGINEERTO MAKE WATERTIGHT CONNECTION TO MANHOLES AND OTHER STRUCTURES UNLESSOTHERWISE STATED BY CITY AND STATE DESIGN STANDARDS AND SPECIFICATIONS.CEMENT MORTAR JOINTS ARE NOT APPROVED.PROPOSED STORM MANHOLE (SOLID CASTING)PROPOSED STORM SEWERPROPOSED STORM MANHOLE (ROUND INLET CASTING)PROPOSED STORM SEWERPROPERTY LINELEGENDPROPOSED SANITARY SEWERPROPOSED WATERMAINCOPROPOSED STORM MANHOLE/ CATCH BASIN (CURB INLET CASTING)PROPOSED STORM SEWER CLENOUTPROPOSED RIPRAPPROPOSED FLARED END SECTIONDNORTHSTORMWATER POND NOTES1. BASIN EXCAVATION SHALL BE HELD 1' ABOVE THE BOTTOM OF THE BASIN UNTIL THECONTRIBUTING DRAINAGE AREAS WITH EXPOSED SOILS HAVE BEEN FULLY STABILIZEDAND BITUMINOUS BASE COURSE INSTALLED ON THE CONTRIBUTING AREAS.2. DIVERT UPLAND DRAINAGE AREAS TO PREVENT RUNOFF FROM ENTERING THEEXCAVATED CELL OR INTO THE WORK AREA.3. CARE MUST BE TAKEN TO AVOID CONTAMINATION OF ENGINEERED SOILS WITHSEDIMENT, IN-SITU, OR TOPSOIL DURING AND AFTER INSTALLATION. MATERIALS MUSTBE SEGREGATED.4. INSTALLATION WITH DRY SOIL CONDITIONS IS CRITICAL TO PREVENT SMEARING.SCHEDULE WORK FOR PERIODS OF DRY WEATHER.5. IN THE EVENT THAT THE SEDIMENT IS INTRODUCED INTO THE BMP DURING ORIMMEDIATELY FOLLOWING EXCAVATION, REMOVE SEDIMENT PRIOR TO INITIATING THENEXT STEP IN THE BASIN CONSTRUCTION PROCESS.6. EXCAVATE SEDIMENT BUILT UP DURING CONSTRUCTION AFTER STABILIZATION OFUPSTREAM AREAS AND BEFORE PLACEMENT OF HYDRAULIC SOIL STABILIZER TYPESPECIAL.7. STOCKPILING OF MATERIAL SHALL NOT BE ALLOWED IN PROPOSED BASIN.8. ALL BASINS CONSTRUCTION ACTIVITIES SHALL BE COMPLETED DURING DRY SOILCONDITIONS.9. ALL WET PONDS SHALL BE PROTECTED DURING CONSTRUCTION OPERATIONS.