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<br />SHEET: C302SHEET: C301 <br />SHEET: C304SHEET: C303 <br />C.S.A.H. NO. 10 - SITE ACCESS, SEE SHEET C305 <br />C. <br />S <br />. <br />A <br />. <br />H <br />. <br /> <br /> <br /> <br />N <br />O <br />. <br /> <br />1 <br />7 <br /> <br />- <br /> <br />S <br />I <br />T <br />E <br /> <br />A <br />C <br />C <br />E <br />S <br />S <br /> <br />S <br />E <br />E <br /> <br />S <br />H <br />E <br />E <br />T <br /> <br />C <br />3 <br />0 <br />6 <br />1.See landscape plans for required tree protection. Tree protection shall be in place prior to beginning any grading <br />or demolition work at the site. <br />2.All elevations with an asterisk (*) shall be field verified. If elevations vary significantly, notify the Engineer for <br />further instructions. <br />3.Grades shown in paved areas represent finish elevation. <br />4.All construction shall be performed in accordance with state and local standard specifications for construction. <br />5.Permittees must not excavate infiltration systems to final grade, or within three (3) feet of final grade, until the <br />contributing drainage area has been constructed and fully stabilized unless they provide rigorous erosion <br />prevention and sediment controls (e.g., diversion berms) to keep sediment and runoff completely away from the <br />infiltration area. <br />GRADING NOTES <br />1.THE CONTRACTOR SHALL CONDUCT OPERATIONS AND IMPLEMENT MINNESOTA POLLUTION CONTROL AGENCY (MPCA) <br />BEST MANAGEMENT PRACTICES (BMP) TO CONTROL SITE SILTATION AND EROSION INTO DRAINAGE WAYS. THE <br />CONTRACTOR SHALL COMPLY WITH ALL CONDITIONS AND COMPLETION DATES RELATIVE TO ALL PERMITS ISSUED FOR <br />THE WORK TO BE COMPLETED. THE ENGINEER MAY ISSUE A STOP WORK ORDER FOR ALL DEVELOPMENT WORK AND <br />BUILDING CONSTRUCTION FOR NONCOMPLIANCE WITH THESE MEASURES. <br />2.SEQUENCING. ALL SILT FENCE AND OTHER EROSION CONTROL MEASURES SHALL BE IN PLACE AND APPROVED BY <br />ENGINEER PRIOR TO ANY REMOVALS, EXCAVATION OR CONSTRUCTION AND SHALL BE MAINTAINED UNTIL VIABLE TURF <br />OR GROUND COVER HAS BEEN ESTABLISHED AND APPROVED BY THE ENGINEER. <br />3.SILT FENCE. THE CONTRACTOR SHALL INSTALL SILT FENCE AT THE LOCATIONS SHOWN ON THE PLANS AND IN <br />ACCORDANCE WITH THE CITY STANDARD DETAILS. SILT FENCE DAMS AND INTERIM SUMPS SHALL BE PLACED TO <br />INTERCEPT SILT FROM CONCENTRATED RUNOFF FROM OPEN GRADED AREAS. ADDITIONAL SILT FENCE SHALL BE <br />REQUIRED AS DIRECTED BY THE ENGINEER. <br />4.STOCKPILES. ALL STOCKPILE AREAS SHALL HAVE SILT FENCE OR SEDIMENT TRAPPING SYSTEMS PLACED AROUND THE <br />ENTIRE PERIMETER. <br />5.INLET PROTECTION. THE CONTRACTOR SHALL INSTALL INLET PROTECTION ON ALL EXISTING STORM SEWER INLETS IN <br />ACCORDANCE WITH THE CITY STANDARD DETAILS. INLET PROTECTION SHALL ALSO BE PROVIDED ON ALL PROPOSED <br />STORM SEWER INLETS IMMEDIATELY FOLLOWING CONSTRUCTION OF THE INLET. INLET PROTECTION MUST BE <br />INSTALLED IN A MANNER THAT WILL NOT IMPOUND WATER FOR EXTENDED PERIODS OF TIME OR IN A MANNER THAT <br />PRESENTS A HAZARD TO VEHICULAR OR PEDESTRIAN TRAFFIC. <br />6.TEMPORARY SEDIMENT BASINS. THE CONTRACTOR SHALL INCORPORATE TEMPORARY SEDIMENT BASINS THROUGHOUT <br />THE CONSTRUCTION SITE TO CAPTURE RUNOFF AND SLOW THE FLOW OF WATER AND ALLOW SEDIMENT TO SETTLE <br />OUT. TEMPORARY SEDIMENT BASINS SHALL BE INSTALLED AS DIRECTED BY THE CITY ENGINEER. <br />7.ROCK CONSTRUCTION ENTRANCE. A ROCK ENTRANCE SHALL BE CONSTRUCTED AND MAINTAINED AS SHOWN ON THE <br />PLAN TO REDUCE TRACKING OF SILT AND DIRT ONTO THE PUBLIC STREETS. A GEOTEXTILE FABRIC SHALL BE PLACED <br />UNDERNEATH THE ROCK. THE ROCK SHALL BE PERIODICALLY REPLENISHED TO MAINTAIN THE INTENDED <br />PERFORMANCE. MUD AND DEBRIS SHALL BE REMOVED OR SCRAPED FROM TIRES AND VEHICLE UNDERCARRIAGE PRIOR <br />TO LEAVING THE SITE. <br />8.STREET SWEEPING. ALL STREETS USED FOR ACCESS TO THE SITE AND HAUL ROUTES USED FOR CONSTRUCTION <br />EQUIPMENT AND MATERIAL SUPPLIES SHALL BE CLEANED AT THE END OF EACH WORKING DAY. THE CITY OR ENGINEER <br />MAY ORDER ADDITIONAL SWEEPING OF THE STREETS AS DEEMED REQUIRED AT DEVELOPER/CONTRACTOR EXPENSE. <br />9.DEWATERING. EACH EXCAVATION SHALL BE KEPT DRY DURING THE COURSE OF ALL WORK HEREIN, INCLUDING <br />SUBGRADE CORRECTION, PIPE INSTALLATION, STRUCTURE CONSTRUCTION AND BACKFILLING, TO THE EXTENT THAT NO <br />DAMAGE FROM HYDROSTATIC PRESSURE, FLOATATION OR OTHER DAMAGE RESULTS. ALL EXCAVATIONS SHALL BE <br />DEWATERED TO A DEPTH OF AT LEAST 3 INCHES BELOW THE BOTTOM OF THE CONCRETE SLAB OR PIPE TO BE <br />INSTALLED THEREIN. THE CONTRACTOR MAY USE ANY METHOD OR COMBINATION OF METHODS FOR DEWATERING HE <br />CHOOSES; HOWEVER, ALL DEWATERING METHODS AND EQUIPMENT WHICH IN THE OPINION OF THE ENGINEER, ARE <br />INEFFECTIVE SHALL BE ABANDONED, IMPROVED, REPLACED OR THERWISE ALTERED TO OBTAIN EFFECTIVE <br />DEWATERING. THE CONTRACTOR SHALL PROVIDE ALL POWER, PUMPS, MATERIALS AND APPARATUS NECESSARY, AND <br />SHALL BE RESPONSIBLE FOR DISPOSING OF THE WATER PUMPED FROM THE EXCAVATION IN A MANNER WHICH WILL NOT <br />INTERFERE WITH OTHER WORK WITHIN THE AREA AND NOT TO DAMAGE PUBLIC OR PRIVATE PROPERTY. THE <br />CONTRACTOR WILL BE HELD RESPONSIBLE FOR THE CONDITION OF ANY PIPE, CONDUIT, DITCH, CHANNEL OR NATURAL <br />WATERCOURSE UTILIZED FOR DRAINAGE PURPOSES, AND ALL EROSION, SEDIMENT OR OTHER ADVERSE RESULTS OF <br />THEIR USE SHALL BE REPAIRED. <br />10.POSITIVE DRAINAGE AND PROTECTION. THE CONTRACTOR SHALL MAINTAIN POSITIVE DRAINAGE THROUGHOUT THE <br />SITE AT ALL TIMES. LOW POINTS WITHIN AND ALONG ROADWAYS ARE EXPRESSLY PROHIBITED. THE CONTRACTOR <br />SHALL BE RESPONSIBLE FOR TEMPORARY DITCHES, PIPING OR OTHER MEANS TO FACILITATE PROPER DRAINAGE <br />DURING CONSTRUCTION. TO PROTECT PREVIOUSLY GRADED AREAS FROM EROSION, WOOD FIBER BLANKET SHALL BE <br />PLACED IMMEDIATELY ON STEEP SLOPES (1:3 OR GREATER) AND EMBANKMENTS, PERMANENT AND TEMPORARY PONDS, <br />AND OUTLETS AND OVERFLOWS TO PROTECT THE COMPLETED GRADE AND MINIMIZE SILT IN THE RUNOFF. <br />11.DRAINAGE DITCHES. THE NORMAL WETTED PERIMETER OF ANY TEMPORARY OR PERMANENT DRAINAGE DITCH OR <br />SWALE THAT DRAINS WATER FROM ANY PORTION OF THE CONSTRUCTION SITE, OR DIVERTS WATER AROUND THE SITE, <br />MUST BE STABILIZED WITHIN 200 LINEAL FEET FROM THE PROPERTY EDGE, OR FROM THE POINT OF DISCHARGE INTO <br />ANY SURFACE WATER. STABILIZATION OF THE LAST 200 LINEAL FEET MUST BE COMPLETED WITHIN 24 HOURS AFTER <br />CONNECTING TO A SURFACE WATER. STABILIZATION OF THE REMAINING PORTIONS OF ANY TEMPORARY OR <br />PERMANENT DITCHES OR SWALES MUST BE COMPLETE WITHIN 14 DAYS AFTER CONNECTING TO A SURFACE WATER AND <br />CONSTRUCTION IN THAT PORTION OF THE DITCH HAS TEMPORARILY OR PERMANENTLY CEASED. TEMPORARY OR <br />PERMANENT DITCHES OR SWALES THAT ARE BEING USED AS A SEDIMENT CONTAINMENT SYSTEM (WITH PROPERLY <br />DESIGNED ROCK DITCH CHECKS, BIO ROLLS, SILT DIKES, ETC.) DO NOT NEED TO BE STABILIZED. THESE AREAS MUST BE <br />STABILIZED WITHIN 24 HOURS AFTER NO LONGER BEING USED AS A SEDIMENT CONTAINMENT SYSTEM. <br />12.TURF ESTABLISHMENT. ALL EXPOSED SOIL AREAS MUST BE STABILIZED AS SOON AS POSSIBLE TO LIMIT SOIL EROSION <br />BUT IN NO CASE LATER THAN 14 DAYS AFTER THE CONSTRUCTION ACTIVITY IN THAT PORTION OF THE SITE HAS <br />TEMPORARILY OR PERMANENTLY CEASED. <br />13.MAINTENANCE AND INSPECTION. EROSION CONTROL MEASURES SHALL BE MAINTAINED THROUGHOUT THE <br />CONSTRUCTION AND UNTIL SATISFACTORY ESTABLISHMENT OF PERMANENT GROUND COVER IS OBTAINED. ALL <br />EROSION AND SEDIMENTATION CONTROL MEASURES, AND STORMWATER OUTFALLS MUST BE INSPECTED WEEKLY, AND <br />WITHIN 24 HOURS OF THE SITE RECEIVING 0.5 INCHES OF RAIN. REPAIRS MUST BE MADE ON THE SAME DAY OR <br />FOLLOWING DAY OF THE INSPECTION. UNSATISFACTORY CONDITIONS NOT REPAIRED OR CLEANED UP WITHIN <br />48-HOURS OF NOTIFICATION SHALL RESULT IN A STOP WORK ORDER, AND/OR SAID WORK SHALL BE COMPLETED AT <br />CONTRACTOR'S EXPENSE. <br />14.REMOVAL. THE CONTRACTOR SHALL REMOVE AND DISPOSE OF ALL TEMPORARY EROSION CONTROL MEASURES, <br />STRUCTURES AND DEVICES ONLY AFTER RECEIVING ENGINEER APPROVAL. ALL DEBRIS, STAKES, AND SILTS ALONG SILT <br />FENCES SHALL BE REMOVED AND DISPOSED OFF SITE. THE CONTRACTOR SHALL HAND RAKE SILTED AREAS ALONG THE <br />FENCE LOCATIONS TO PROVIDE A SMOOTH FINAL GRADE AND SHALL RESTORE THE GROUND SURFACE WITH SEED OR <br />SOD, AS REQUIRED, TO MATCH THE FINISHED GRADE TO THE ADJACENT AREA. <br />15.FINAL STORM SEWER SYSTEM. AT THE COMPLETION OF THE WORK AND BEFORE THE FINAL WALK THROUGH, THE <br />CONTRACTOR SHALL REMOVE STORM SEWER INLET PROTECTION MEASURES AND THOROUGHLY FLUSH THE STORM <br />SEWER SYSTEM. SEDIMENT AND DEBRIS SHALL BE COMPLETELY REMOVED AND CLEANED AT THE INLETS, OUTLETS, AND <br />DOWNSTREAM OF EACH OUTLET. RIPRAP AND GEOTEXTILE FABRIC MAY REQUIRE REPLACEMENT AS DIRECTED BY THE <br />ENGINEER TO OBTAIN A LIKE NEW INSTALLATION ACCEPTABLE TO THE CITY <br />16.DITCH CHECK (BIOROLL BLANKET SYSTEM). BIOROLL AND BLANKET SYSTEMS SHALL BE INSTALLED AS DITCH CHECKS <br />ONLY IN SPECIFIED LOCATIONS AS APPROVED BY THE CITY ENGINEER. BIOROLLS ARE NOT TO BE UTILIZED IN AREAS <br />WHERE VEHICLE AND CONSTRUCTION TRAFFIC OCCUR. <br />17.FLOTATION SILT CURTAIN. FLOTATION SILT CURTAIN SHALL BE UTILIZED WHEN CONSTRUCTION ACTIVITIES OCCUR <br />DIRECTLY ADJACENT TO LAKES, STREAMS OR WETLANDS IN ORDER TO CONTAIN SEDIMENTS NEAR THE BANKS OF <br />WORKING AREAS. THE INSTALLATION OF FLOTATION SILT CURTAINS WILL BE REQUIRED AS DIRECTED BY THE CITY <br />ENGINEER. <br />18.CONCRETE WASHOUT ONSITE. ALL LIQUID AND SOLID WASTES GENERATED BY CONCRETE WASHOUT OPERATIONS MUST <br />BE CONTAINED IN A LEAK-PROOF CONTAINMENT FACILITY OR IMPERMEABLE LINER. A COMPACTED CLAY LINER THAT <br />DOES NOT ALLOW WASHOUT LIQUIDS TO ENTER GROUND WATER IS CONSIDERED AN IMPERMEABLE LINER. THE LIQUID <br />AND SOLID WASTES MUST NOT CONTACT THE GROUND, AND THERE MUST NOT BE RUNOFF FROM THE CONCRETE <br />WASHOUT OPERATIONS OR AREAS. LIQUID AND SOLID WASTES MUST BE DISPOSED OF PROPERLY AND IN COMPLIANCE <br />WITH MPCA REGULATIONS. A SIGN MUST BE INSTALLED ADJACENT TO EACH WASHOUT FACILITY TO INFORM CONCRETE <br />EQUIPMENT OPERATORS TO UTILIZE THE PROPER FACILITIES. <br />CITY OF LAKE ELMO GRADING AND <br />EROSION STANDARD PLAN NOTES <br />W: <br />\ <br />2 <br />0 <br />2 <br />3 <br />\ <br />C <br />i <br />v <br />i <br />l <br />\ <br />1 <br />2 <br />2 <br />3 <br />6 <br />1 <br />2 <br />8 <br /> <br />- <br /> <br />N <br />e <br />w <br /> <br />S <br />t <br />i <br />l <br />l <br />w <br />a <br />t <br />e <br />r <br /> <br />E <br />l <br />e <br />m <br />e <br />n <br />t <br />a <br />r <br />y <br /> <br />S <br />c <br />h <br />o <br />o <br />l <br /> <br />- <br /> <br />W <br />o <br />l <br />d <br />\ <br />C <br />. <br /> <br />D <br />e <br />s <br />i <br />g <br />n <br />\ <br />D <br />r <br />a <br />w <br />i <br />n <br />g <br /> <br />F <br />i <br />l <br />e <br />s <br />\ <br />1 <br />2 <br />2 <br />3 <br />6 <br />1 <br />2 <br />8 <br /> <br />- <br /> <br />C <br />3 <br />0 <br />0 <br /> <br />G <br />r <br />a <br />d <br />i <br />n <br />g <br /> <br />P <br />l <br />a <br />n <br />. <br />d <br />w <br />g <br />Revisions <br />Description Date Num <br />Check: <br />Drawn: <br />Date: <br />Comm: <br />TJR <br />MTH <br />11-07-2024 <br />12236128 <br />3524 Labore Road <br />White Bear Lake, MN 55110 <br />651.481.9120 (f) 651.481.9201 <br />www.larsonengr.com <br />C 2024 Larson Engineering, Inc. All rights reserved. <br />3524 Labore Road <br />White Bear Lake, MN 55110 <br />651.481.9120 (f) 651.481.9201 <br />www.larsonengr.com <br />Larson <br />Engineering, Inc. <br />Greg A. Buchal, P.E. <br />Date: Lic. No.:11.07.2024 23793 <br />I hereby certify that this plan, specifications or report <br />was prepared by me or under my direct supervision <br />and that I am a duly licensed Professional Engineer <br />under the laws of the state of Minnesota. <br />INDEPENDENT SCHOOL <br />DISTRICT #834 <br />New Lake Elmo <br />Elementary School <br />1875 Greeley St S, Stillwater, MN <br />55082 <br />10928 10th Street North <br />Lake Elmo MN 55042 <br />A <br />F <br />E <br />D <br />C <br />B <br />A <br />1 2 3 4 5 6 7 8 <br />MN <br />ADDENDUM #1 NOVEMBER 21, 2024 1 <br />ADDENDUM #3 DECEMBER 10, 2024 2 <br />FINAL PLAT NOVEMBER 22, 2024 <br />FINAL PLAT RESUBMITTAL JANUARY 3, 2025 <br />FINAL PLAT RESUBMITTAL JANUARY 17, 2025 <br />GRADING PLAN - <br />OVERALL <br />C300 <br />0 <br />NORTH <br />40 80 160 <br />SYMBOL LEGENDSYMBOL LEGEND <br />PROPOSED CONTOURS - MAJOR INTERVAL <br />GRADE BREAK LINE <br />PROPOSED CONTOURS - MINOR INTERVAL949 <br />950 <br />950 EXISTING CONTOURS <br />2.0% <br />950.00 TC <br />949.50 GL <br />GRADE SLOPE <br />SPOT ABBREVIATIONS: <br />TC - TOP OF CURB <br />GL - GUTTER LINE <br />B - BITUMUNOUS <br />C - CONCRETE <br />G - GRADE <br />TS - TOP STEP <br />BS- BOTTOM STEP <br />EOF - EMERGENCY OVERFLOW <br />OF - OVERFLOW <br />TW - TOP OF WALL <br />BW - BOTTOM OF WALL (F/G) <br />AG - AGLIME <br />RIM - CASTING RIM <br />(*) - EXISTING TO BE VERIFIED <br />EASEMENT LINE <br />PROPERTY LINE <br />RIGHT OF WAY LINE <br />BENCHMARK <br />TOP OF 3/8" IRON PIPE, LOCATED AT <br />NORTHEAST PROPERTY CORNER OF LOT 5, <br />BLOCK 1 OF THE DAVID NELSON ESTATES <br />DEVELOPMENT. ELEVATION = 924.82 <br />20' MAINTENANCE <br />ACCESS ROADWAY <br />10' MAINTENANCE <br />BENCH <br />100-YEAR HIGH WATER LEVEL (HWL)