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Home My WebLink AboutDPI013.C3.0.GPDRAINAGE SUMMARY The project proposes a building addition on the south side of the existing building over existing pavement/parking area (impervious area). This project is located at the southwest corner of the intersection of Michigan Road and 99th Street in Hamilton County, Indiana. The proposed construction activity will be disturbing approximately 0.24 acres ±; therefore, the project scope is exempt from the City of Carmel's Stormwater Management Permit threshold of land disturbance of 0.25 acres. The construction area will be disturbing existing pavement/parking area. The pavement will be removed within the building addition footprint, utilities relocated as needed, new asphalt pavement installed (binder wedging and surface course, as needed). All storm water runoff will remain in the same pattern with a new roof drain pipe installed to connect into existing on -site storm sewer system and routed to the existing storm water detention facility located at the southwest quadrant of the site. The site was developed in 2001 for Chrysler Realty and rebranded to Ed Martin Pontiac GMC in 2004. Storm water from the site is collected via a network of catch basins in the parking lot and routed to a storm water detention facility located at the southwest quadrant of the site. A parking lot expansion and additional on -site storm water detention and storm water quality BMPs were installed in 2013 on the west side of the property. Refer to Docket No: 12090018 DP AMEND for all previously approved storm water management facilities related to the subject property. There will be no net increase in storm water runoff associated with the building addition due to the fact that all new improvements are replacing already existing impervious areas. BENCHMARK COORDINATE SYSTEM: US STATE PLANE 1983 (AT GROUND) PROJECT DATUM: WORLD GEODETIC SYSTEM (WGS 1984) VERTICAL DATUM: NAVD 88 ZONE: INDIANA EAST 1301 GEOID MODEL: GEOID03 (CONUS) COORDINATE UNITS: US SURVEY FEET DISTANCE UNITS: US SURVEY FEET HEIGHT UNITS: US SURVEY FEET TBM #1 EXISTING PAVED AREA STORM INLET CASTING ELEV=886.92 TBM #2 EXISTING PAVED AREA STORM INLET CASTING ELEV=888.08 CONTRACTOR NOTE NO EARTH DISTURBING ACTIVITY MAY COMMENCE WITHOUT AN APPROVED STORM WATER MANAGEMENT PERMIT. ALL CONCRETE PIPE JOINTS SHALL BE CONTINUOUS O-RING RUBBER GASKET CONFORMING TO ASTM C 443 18 " OF VERTICAL SEPARATION MUST BE MAINTAINED FOR ALL UTILITY CROSSINGS. TOPOGRAPHIC & BOUNDARY NOTE ALL EXISTING HORIZONTAL AND VERTICAL INFORMATION HAS BEEN SHOWN PER AN ALTA/ACSM LAND TITLE SURVEY, DATED 09/21 /10 (JOB #: B33185) AND TOPOGRAPHIC SURVEY (JOB #: B34158) PREPARED BY MILLER SURVEYING, INC. CIVIL SITE GROUP, INC. CANNOT BE HELD RESPONSIBLE IF ACTUAL HORIZONTAL AND VERTICAL DATA IS DIFFERENT FROM THAT SHOWN ON THESE PLANS. CONTRACTOR IS RESPONSIBLE FOR FIELD VERIFICATION OF ALL EXISTING CONDITIONS PRIOR TO COMMENCING WITH CONSTRUCTION. FLOOD NOTE FIRM PANEL MAP NOT PRINTED IN THIS AREA. REFERENCE FLOOD INSURANCE RATE MAP (FIRM) FOR HAMILTON COUNTY, INDIANA, COMMUNITY NAME HAMILTON COUNTY UNINC. AND INC. AREAS, COMMUNITY NUMBER 18057C, MAP NUMBER 18057CO225 G, PANEL NUMBER 0225 G, DATED NOVEMBER 19, 2014. REFERENCE NFIP FIRM MAP #18057CO225 G, EFFECTIVE DATE: NOVEMBER 19, 2014. MINIMUM FLOOD PROTECTION GRADE & LOWEST ADJACENT GRADE DEFINITIONS MINIMUM FLOOD PROTECTION GRADE OF ALL STRUCTURES FRONTING A POND OR OPEN DITCH SHALL BE NO LESS THAN 2 FEET ABOVE ANY ADJACENT 100—YEAR LOCAL OR REGIONAL FLOOD ELEVATIONS, WHICHEVER IS GREATER, FOR ALL WINDOWS, DOORS, PIPE ENTRANCES, WINDOW WELLS, AND ANY OTHER STRUCTURE MEMBER WHERE FLOODWATERS CAN ENTER A BUILDING. MINIMUM FLOOD PROTECTION GRADE (MFPG) = 891.00 (ESTABLISHED FROM ONE —FOOT ABOVE THE MAXIMUM 100—YR WATER SURFACE ELEVATION OF 890.00 ONSITE FOR THE EXISTING PARKING LOT FLOOD ROUTING OVERFLOW ASSUMING 100% CLOGGED). LOWEST ADJACENT GRADE IS THE ELEVATION OF THE LOWEST GRADE ADJACENT TO A STRUCTURE, WHERE THE SOIL MEETS THE FOUNDATION AROUND THE OUTSIDE OF THE STRUCTURE (INCLUDING STRUCTURAL MEMBERS SUCH AS BASEMENT WALKOUT, PATIOS, DECKS, PORCHES, SUPPORT POSTS OR PIERS, AND RIM OF THE WINDOW WELL. MLAG FOR THIS PROJECT = 891.00 (ESTABLISHED FROM ONE —FOOT ABOVE THE MAXIMUM 100—YR WATER SURFACE ELEVATION OF 890.00 ONSITE FOR THE EXISTING PARKING LOT FLOOD ROUTING OVERFLOW ASSUMING 100% CLOGGED). AS OF THE DATE OF THESE DESIGN PLANS, THE MINIMUM LOWEST ADJACENT GRADE (MLAG) SHALL GOVERN FOR ALL PROPOSED STRUCTURES TO BE BUILT IN THE FUTURE ON THIS PROPERTY IN ORDER TO PROTECT FROM LOCALIZED FLOODING. THE MLAG SHOULD BE REEVALUATED BASED UPON THE AS —BUILT CONDITIONS AND ANY CHANGES IN SITE GRADING IN THE AREAS WHERE THE MLAG DESIGN POINT WAS DETERMINED. REFER TO DOCKET NO: 12090018 DP AMEND FOR PREVIOUSLY APPROVED STORM WATER MANAGEMENT FACILITIES RELATED TO THE SUBJECT PROPERTY. Sp w v� SS y SWPPP INITIAL CONTROLS CONTRACTOR TO INSTALL ALL INITIAL EROSION CONTROL MEASURES INDICATED ON SHEET C4.0 PRIOR TO COMMENCING WITH CONSTRUCTION. 55 ASPHAL T SX\S�\Nc' S�GRG a P�GI ls� RGGF NR SOUTH PROPERTY LINE — — — a 8 — T T E / c� E/ 0100� / C�l 9.44 / / ,-1-Y TBM #2 STORM INLET CASTING ELEV=888.08 NORTH 20 0 10 20 ( IN FEET ) 1 inch = 20 ft. LEGEND: 884 EXISTING CONTOUR EXISTING STORM SEWER . m m m m CONSTRUCTION LIMITS M.E. MATCH EXISTING GRADE 8g�1 PROPOSED SPOT ELEVATION O PROPOSED CURB ELEVATION PLAN NOTES: RD 62'± OF 8" PVC (SDR 35 01.0% MIN. SLOPE) ROOF DRAIN LEADER 2.5 MIN. COVER; FIELD VERIFY BUILDING CONNECTION POINT UTILITY VALVE NOTE ALL UTILITY VALVES AFFECTED BY CONSTRUCTION SHALL BE ADJUSTED TO FINAL GRADE AS NEEDED TO BE FLUSH WITH FINISHED PAVEMENT, SIDEWALK OR LANDSCAPE AREA. UTILITY LOCATE NOTE INDIANA 811 FAILED TO LOCATE ALL EXISTING UTILITIES ON AND/OR SURROUNDING THE SUBJECT SITE; THEREFORE, CONTRACTOR IS RESPONSIBLE TO LOCATE AND FIELD VERIFY ANY EXISTING UTILITIES BEFORE COMMENCING WITH CONSTRUCTION. CIVIL SITE GROUP, INC. CANNOT BE HELD RESPONSIBLE IF THE PROPOSED IMPROVEMENTS INTERFERE WITH ANY EXISTING UTILITY INFORMATION NOT SHOWN ON THESE PLANS. EXISTING CONDITIONS NOTE CONTRACTOR TO VERIFY ALL EXISTING CONDITIONS, INCLUDING UTILITIES AND DRAINAGE INFRASTRUCTURE BEFORE COMMENCING WITH CONSTRUCTION. CONTRACTOR TO NOTIFY ENGINEER OF ANY DISCREPANCIES. GENERAL NOTES CONTRACTOR TO KEEP EXISTING PAVEMENT SURROUNDING THE SITE (I.E. MICHIGAN ROAD AND 99TH STREET) "BROOM CLEAN" AND FREE OF SOIL OR AGGREGATE THAT MIGHT BE BROUGHT OFF -SITE. DEPENDING ON THE CONSTRUCTION SEASON, MOISTURE CONTENT AND PROPERTIES OF THE SOILS ON SITE, CHEMICAL MODIFICATIONS AND/OR LIME STABILIZATION MAY BE REQUIRED. SEE SHEET C9.0 FOR SPECIFICATIONS. ALL CONCRETE PIPE JOINTS SHALL BE CONTINUOUS O-RING RUBBER GASKET CONFORMING TO ASTM C 443 CONTRACTOR (NOT THE PROJECT SITE OWNER) WILL BE RESPONSIBLE FOR THE DISPOSAL OF ANY SOIL, MATERIALS, ETC. NO OFF -SITE BORROWS OR STOCKPILES WILL BE NEEDED FOR THIS PROJECT. CONTRACTOR SHALL SUBMIT PRECAST STORM SEWER STRUCTURE SHOP DRAWINGS TO ENGINEER FOR REVIEW/APPROVAL PRIOR TO MANUFACTURING. U ® Z p—+ a 0 V I� wQC" � > I� Q Lv w �Cf)( c, r�^ �00 w v�� WE�M -0 a� cl) Q J00�' a- V ♦�� Q N S C,4 • ° • • N9 ; s PE10910647 ° STATE OF p �� . O O1 11 \ ��,♦ DATE: 05/17/2021 0 Q Q �xQ � w�� Q C8 Vow �4�UM--I r'1 w PROJECT NUMBER DPI. 013 DRAWING NUMBER C3m0 SHEET 4 OF 12 DWN BY: BSC CHKD. BY: EAG SCALE: 1 of = 20' DATE: 05 17 21