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HomeMy WebLinkAboutR-41774712" 12" WIDTH VARIES - SEE PLAN 12" 12" S g 1 2 1111 g - S �IIIIIII II II III-' NOTE: THE TYPICAL SECTION SHOWN HERE MAY NOT REFLECT EACH INDIVIDUAL BIORETENTION CELL. STRUCTURE LOCATION AND UNDERDRAIN LOCATIONS VARY. SEE PLAN VIEWS. (2:) TYPICAL BIORETENTION SECTION C501-6H SCALE: NTS NOTE: THE TYPICAL SECTION SHOWN HERE MAY NOT REFLECT EACH INDIVIDUAL BIORETENTION CELL. STRUCTURE LOCATION AND UNDERDRAIN LOCATIONS VARY. SEE PLAN MEWS. SCALE: NTS WSP AC "( 3330I 9NA e tl CALL 48 HOURS 1 I 300 w al fetl:( Wry, 900012Kb BEFORE YOU DIG ref:(9 1- -800-424-5555 )431-2250 FAX: (i(6) 431-E350 SYM RENSION SY APPROVED DATE ORIG APRON R - CENTRAL C180242 WSP SPT I 07/09/21 REVISION BY I APPROVED I DATE i L_BOEArw" I I I II I I I1 I I� � I� � IIII_1 I IIIIIII-,III NOTE: THE TYPICAL SECTION SHOWN HERE MAY NOT REFLECT EACH INDIVIDUAL BIORETENTION CELL. STRUCTURE LOCATION AND UNDERDRAIN LOCATIONS VARY. SEE PLAN VIEWS. TYPICAL- BIORETENTION SECTION C501-6H SCALE: NITS ACCEPTABILITY THIS DESIGN AND/OR SPECIFICATION IS APPROVED APPRDVED�PTTC GENERAL NOTES 1. HORIZONTAL DATUM: WASHINGTON STATE COORDINATE SYSTEM, NORTH ZONE, NORTH AMERICA DATUM 1983(91). VERTICAL DATUM: NATIONAL GEODETIC VERTICAL DATUM 1929 (NGVD29). VERTICAL DATUM CONVERSION: NGVD29 TO THE NORTH AMERICAN VERTICAL DATUM 1988 (NAVD88) _ NGVD29 + 3.60 FEET. 2. THERE SHALL BE NO EXPOSED GALVANIZED MATERIALS, COATINGS OR ZINC APPLIED SURFACE TREATMENTS ON ANY EXTERIOR OR UNDERGROUND MATERIALS OR SURFACES. ALL GALVANIZED OR ZINC APPLIED MATERIALS OR COATINGS SHALL BE PERMANENTLY PAINTED OR COATED TO PREVENT EXPOSURE OF THE GALVANIZED/ZINC MATERIALS PRIOR TO INSTALLATION OR COMPLETION OF CONSTRUCTION. 3. PERMANENT WATER QUALITY TREATMENT FACILITIES SHALL NOT BE USED TO CONVEY OR CONTAIN CONSTRUCTION STORM WATER. NEW FACILITIES SHALL BE KEPT OFFLINE UNTIL PROJECT IS COMPLETE. THE CONTRACTOR SHALL CLEAN AND FLUSH ALL PARTS OF THE SYSTEM PRIOR. SEE GENERAL NOTES ON SHEET C501-IA AND C501-1B, 4. SEE SHEETS C17E, C17F, C18E, AND C18F FOR OVERFLOW STRUCTURE INFORMATION AND CONVEYANCE PIPE INFORMATION. 5. SEE BIORETENTION LANDSCAPING PLANS ON SHEETS L501-7A THROUGH L501-7B FOR PLANTING DETAILS. 6. BIORETENTION SOIL MEDIA SHALL BE PER THE BIORETENTION SOIL MEDIA STANDARD SPECIFICATIONS PROVIDED IN REFERENCE SECTION 11-C OF THE 2017 CITY OF RENTON SURFACE WATER DESIGN MANUAL, SEE SHEET C501-6K. 7. 4" STREAMBED COBBLES SHALL BE PER WSDOT STANDARD SPEC SECTION 9-30.11(2) 8. SLOTTED UNDERDRAIN SHALL BE SLOTTED SUBSURFACE DRAIN PVC PER ASTM D1785 SCH 40. SLOTS SHOULD BE CUT PERPENDICULAR TO THE LONG AXIS OF THE PIPE AND BE 0.04 TO 0.069 INCHES BY 1 INCH LONG AND BE SPACED 0.25 INCHES APART (SPACED LONGITUDINALLY). SLOTS SHOULD BE ARRANGED IN FOUR ROWS SPACED ON 45-DEGREE CENTERS AND COVER 1/2 OF THE CIRCUMFERENCE OF THE PIPE. OBSERVATION WELL CONSTRUCTED OF NON -PERFORATED MATERIAL SHALL BE LOCATED AT END OF PIPE. OBSERVATION PORT SHALL HAVE LOCKING CAST-IRON LID. 9. EXTRUDED CURB SHALL BE WSDOT STU PLAN F-10.42-00 TYPE 6 10. INSTALL NEW/SALVAGED CONCRETE WHEELSTOP PER DETAIL 5, SHEET C501-6H. 11. CONTRACTOR SHALL VERIFY DEPTH TO SEASONAL HIGH GROUNDWATER PRIOR TO CONSTRUCTION AND NOTIFY ENGINEER IMMEDIATELY IF DEPTH IS LESS THAN 7.5-FEET FROM EXISTING GRADE. 12. CONTRACTOR'S AS -BUILT RECORD DOCUMENTS SHALL INCLUDE IN -PLACE INFILTRATION RATE FOR EACH COMPLETE BIORETENTION CELL. INFILTRATION RATE TEST SHALL BE PERFORMED USING THE PILOT INFILTRATION TEST (PIT) MENHOD AT THE FINISHED SURFACE OF THE BIORETENTION SOIL MIX WITH A MAXIMUM 6-INCH PONDING DEPTH. 13. UNDERDRAIN AGGREGATE SHALL BE PER TABLE FBALC OF THE 2017 CITY OF RENTON SURFACE WATER DESIGN MANUAL. 1C IMPERMEABLE GEOMEMBRANE LINER SHALL BE UV RESISTANT, HAVE A MINIMUM THICKNESS OF 30 MILS. LINER SHALL BE INSTALLED WITH A MINIMUM OF 12-INCHES OF COVER. CONSTRUCTION NOTES 1� TOP OF FREEBOARD TOP OF ECHOING TOP OF BIORETENTION SOIL MIX ® 18" MINIMUM DEPTH BIORETENTION SOIL MIX 4" MINIMUM DEPTH STREAMBED COBBLES HAND PLACED ON BIORETENTION SOIL MIX. © UNDERDRAIN AGGREGATE 7� EXTRUDED CURB OR WHEEL STOP PROVIDE BEVELED EDGE AT 2" DEPTH EXISTING ASPHALT 6" SLOTTED UNDERDRAIN PIPE PER ASTM D 1785 SCH 40. SEE NOTE 8. 10 IMPERMEABLE GEOMEMBRANE LINER SHALL BE PROVIDED IF FIELD VERIFIED DEPTH TO SEASONAL HIGH GROUNDWATER TABLE IS LESS THAN 7.5-FEET FROM EXISTING GRADE OR AS DIRECTED BY ENGINEER. 11 CB TYPE 1 W/BEEHIVE GRATE OVERFLOW STRUCTURE. RIM OF OVERFLOW STRUCTURE AND TOP OF PONDING SHALL BE SET AT 6-INCHES BELOW THE TOP OF EXISTING ASPHALT. CONTRACTOR SHALL FIELD VERIFY ELEVATIONS PRIOR TO INSTALLING OVERFLOW CONVEYANCE STRUCTURES. 12 BACKFILL 2-FOOT WIDE ELEVATED UNDERDRAIN TRENCH WITH NATIVE SOILS COMPACTED TO 95% OF MAX DENSITY PER ASTM D1557 [CIVIL PER STORM DETAILS R-41770471 IN COMPLIANCE WITH CITY OF RENTON STANDARDS DEVELOPMENT ENOINEPAINO ichavez 08/25/2021 C180242 i01-6L C 180242 1 WW RTN-YD-0501-6L 07/09/21 MASTER RENTON SITE 111