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STORMWATER SUMMARY TOTAL PROPERTY AREA =82,914 SF TOTAL DISTURBED AREA = 76,214 SF > 1 ACRE THEREFORE A NPDES SWPPP PERMIT WILL BE REQUIRED. PRE -DEVELOPMENT PERVIOUS AREA = 53,391 SF IMPERVIOUS AREA = 29,523 SF 2 -YEAR STORM = 0.41 CFS 10 -YEAR STORM = 2.11 CFS 100 -YEAR STORM = 7.61 CFS 100 -YEAR 10 -DAY SNOW MELT = 2.29 CFS POST -DEVELOPMENT PERVIOUS AREA = 39,081 SF IMPERVIOUS AREA = 43,883 SF 2 -YEAR STORM = 0.17 CFS 10 -YEAR STORM = 0.66 CFS 100 -YEAR STORM = 3.69 CFS 100 -YEAR STORM INFILTRATION BASIN HWL =909.12 100 -YEAR, 10 -DAY SNOW MELT = 1.87 CFS 100 -YEAR, 10 -DAY SNOW MELT INFILTRATION BASIN HWL = 908.63 nWRev-1 W2846 0 0 0) 0) N 0 :W28000W2846 LAST SAVED BY: SMICHNO LOCATION: a a C3 DRAWING: 2846 JOB # 2846 / /-WAT \NAAS WATER 77th STREET / / Cb / ORE DRILL AND CONNECT TO EXISTING CB INV 906.00 is" 35 LF, 12" HDPE @ 4.86% 912 HP 911.50 OVERFLOW STRUCTURE RIM 909.50 INV (SE,NW) 907.70 SUMP 905.00 -cr GAS MH 3 NYLOPLAST CASTING RIM 912.45 INV 906.01 73A MH 4 NYLOPLAST W/ SOLID CASTING RIM 912.45 INV W,E 906.57 INV SE 908.00 SS WATER SS WATER SS SS SS WATER ----------------------------------------- SITE BENCHMARK SITEBENCHMARK ELEVATIONS BASED ON ASSUMED VERTICAL DATUM USING THE BENCHMARKS SHOWN ON THE SURVEY. (NAVD 88) 51 LF, 18" 14 LF, 12" HDPE @ -19.28% FG 913.00 FG 912.40 FG 912.37 MH 2 NYLOPLAST W/ SOLID CASTING RIM 912.11 INV 905.50 24 LF, 18" HDPE @ 2.08% • 03 cll. cb • to9D/70 FES 1 INV 905.00 44k akf INFILTRATION BASIN BOTTOM = 905.00 NWL = 907.70 MH 1 NYLOPLAST W/ SOLID CASTING RIM 912.16 INV 905.18 3.7% 36 LF, 18" FG 912.88 OHE NYLOPLAST W/ SOLID CASTING RIM 910.75 OHE WATEI OHE 18" FG 911.43 FG 911.81 FG 911.55 0.1% FG 911.53 8" OHE FES 2 INV 905.00 FG 912.37 FG 912.40 FG 912.96 FG 913.00 FG 913.00 73A FG 913.00 /;FG 912.40 ,--FG 912.46 FG 912.80 FG 912.69 FG 912.46 151 LF 18" HDPE @ 0.50% FG 912.75 60/0 40 LF, 12" FG 912.88 FG 912.52 911 912 4 FG 912.96 FG 912 60 FG 913.00 4 FG 912.79 4 4 Cl FG 912.79 4 4 FG 912.75 CB 4 NYLPPLAST W/ GR\ATE CASTING RIM 912'22s3 INV 908.40\ FG 912.90 FG 912.90 TC 912.83 G 912'33 FG TC 912.83 G 912.33 TC 912.72 G 912.22 TC 912.72 G 912.22 FG 913.00 FG 9•1k.00 FG 912.75 FG 912.75 aaa PROPOSED SENIOR ASSISTED LIVING ±21,118 S.F. ONE STORY -39 UNITS FFE = 913.00 FG 912.40 FG 912.91 FG 913.00 4 • FG 912.96 FG 913.00 FG 912.60 977 1 TC 912.63 G 912.13 FG 912.96 FG 912.9 CB 5 NYLOPLAST W/ GRATE CASTING RIM 912.23 INV 908.15 • • • Q11 F_G 913.00 FG 913.00 FG 912.75 FG 912.75 FG 912.75 FG 912.63 FG 912.50 FG 912.48 • TC 912.18 G 911.68 TC 912.40 G 911.90 TC 912.16 FG 911.65 TC 911.97 G 911.47 co TC 911.68 G 911.18 TC 912.27 G 911.77 12 TC 912.18 G 911.68 rn 1 FG 912.90. j -FG 913.00 FFG 913.00 FG 913.00 G 912.33 44 912.33 le FG 912.33- G 912.33 0.0% • 4 MI MI 1=1 MN IMP UM C 91t71 IcR Id A r FG 912.3n 4 FG 912.95 FG 913.00 - FG 912.93 A FG 912.73 FG 912.81 10 FG 912.88 1.5% TC 912.81 FG 912.52 FG 912.52 TC 912.58 G 912.08 0 0 TC 912.69 G 912.19 TC 912.60 G 912.10 12.07 11.° TC 912.21 G 911.71 GAS GAS TC 912.54 G 912.04 FG 911.65 -FG 911.65 IMO IM • olo 912 IMMIM GAS • • • FG 911.74 • 973 TC 911.26 G 910.76 CB 3 TC 910.41 G 909.91 / PETG:99011.215..083%33 RIM 910 76 INV 905.94 OHE Fq 911.63 • • • • • • • • • AAA 21A • 3" SP ©HE • • • • • AAA ------------------------------------- PROJECT BM J1: TNH=912.47 PROJECT BM #2: • 20' 30' 40' SCALE IN FEET PROPOSED PROPERTY LINE/RIGHT OF WAY LINE GRADE BREAK CONTOUR ELEVATIONS STORM DRAIN SPOT ELEVATIONS: TC = TOP OF CURB G = GUTTER FG = FINISH GRADE GENERAL GRADING NOTES A. PRIOR TO INSTALLATION OF STORM OR SANITARY SEWER, THE CONTRACTOR SHALL EXCAVATE, VERIFY, AND CALCULATE ALL CROSSINGS AND INFORM THE OWNER AND THE ENGINEER OF ANY CONFLICTS PRIOR TO CONSTRUCTION. THE ENGINEER WILL BE HELD HARMLESS IN THE EVENT THE ENGINEER IS NOT NOTIFIED OF DESIGN CONFLICTS. B. CONTRACTOR HAS THE OPTION TO BID THE FOLLOWING MATERIAL FOR THE STORM SEWER SYSTEM EXCEPT WHERE OTHERWISE NOTED: HDPE OR PVC AS INDICATED ON THIS PLAN WHERE THE WORD PIPE IS USED. ALL PIPES SHALL HAVE A MAXIMUM ROUGHNESS COEFFICIENT ("N") OF 0.011 AND SHALL MEET OR EXCEED THE PIPE MANUFACTURERS REQUIREMENTS FOR MINIMUM AND MAXIMUM COVER. CONTRACTOR SHALL REFER TO THE SITEWORK SPECIFICATION SECTION FOR STORM SEWER SYSTEMS FOR ACCEPTABLE TYPE AND MATERIAL. C. ALL SLOPES AND AREAS DISTURBED BY CONSTRUCTION SHALL BE GRADED SMOOTH AND 4" OF TOPSOIL APPLIED. IF ADEQUATE TOPSOIL IS NOT AVAILABLE ON SITE, THE CONTRACTOR SHALL PROVIDE TOPSOIL, APPROVED BY THE OWNER, AS NEEDED. THE AREA SHALL THEN BE SEEDED, FERTILIZED, MULCHED, WATERED AND MAINTAINED UNTIL HARDY GRASS GROWTH IS ESTABLISHED IN ALL AREAS (SEE LANDSCAPE PLAN FOR SEED MIX AND PROPER APPLICATION RATE). ANY AREAS DISTURBED FOR ANY REASON PRIOR TO FINAL ACCEPTANCE OF THE PROJECT SHALL BE CORRECTED BY THE CONTRACTOR AT NO ADDITIONAL COST TO THE OWNER. D. THE CONTRACTOR IS SPECIFICALLY CAUTIONED THAT THE LOCATION AND/OR ELEVATION OF EXISTING UTILITIES AS SHOWN ON THESE PLANS IS BASED ON RECORDS OF THE VARIOUS UTILITY COMPANIES, AND WHERE POSSIBLE, MEASUREMENTS TAKEN IN THE FIELD. THE INFORMATION IS NOT TO BE RELIED ON AS BEING EXACT OR COMPLETE. THE CONTRACTOR MUST CALL THE APPROPRIATE UTILITY COMPANY AT LEAST 48 HOURS BEFORE ANY EXCAVATION TO REQUEST EXACT FIELD LOCATION OF UTILITIES. E. UNLESS OTHERWISE SHOWN, CALLED OUT OR SPECIFIED HEREON OR WITHIN THE SPECIFICATIONS: ALL STORM DRAIN PIPE BEDDING SHALL BE INSTALLED PER DETAIL 28A. ALL STORM DRAIN PIPES ARE MEASURED FROM CENTER OF STRUCTURES AND ENDS OF FLARED END SECTIONS. 0 GRADING NOTES 09D FLARED END SECTION. 18D MATCH EXISTING PAVEMENT ELEVATIONS. El GRADING DETAILS 17D RIP RAP PAD 21A CURB INLET 73A NYLOPLAST DRAIN BASIN 73B OUTLET CONTROL STRUCTURE ENGINEER E 479 • 28461 10/8/14 ALC ALC SJM SJM CEI PROJECT NO. INITIAL DATE DPOR PM DES DRW 032 __,v Engineering Associates, Inc. ENGINEERS • PLANNERS • SURVEYORS LANDSCAPE ARCHITECTS • ENVIRONMENTAL SCIENTISTS 2025 Centre Pointe Blvd., Suite 210 (651)452-8960 Mendota Heights, MN 55120 (651)452-1149 WHITE PINE SENIOR LIVING 700A d 7000 77TH ST W LINO LAKES MN 55014 GRADING PLAN REV DATE SHEET NO. 10/15/14 C3 @ 2014 CEI ENGINEERING ASSOCIAIES, INC.