HomeMy WebLinkAbout10_L_Declaration_of_Covenant_ExhibitB_18216EXHIBIT B - DESIGN AND MAINTENANCE INSTRUCTIONS
FULL INFILTRATION
THIS PROPERTY CONTAINS A STORMWATER MANAGEMENT FLOW CONTROL BMP (BEST MANAGEMENT PRACTICE)
CALLED "FULL INFILTRATION" WHICH WAS INSTALLED TO MITIGATE THE STORMWATER QUANTITY AND QUALITY
IMPACTS OF SOME OR ALL OF THE IMPERVIOUS SURFACES ON THIS PROPERTY. FULL INFILTRATION IS A METHOD
OF SOAKING RUNOFF FROM IMPERVIOUS AREA (SUCH AS PAVED AREA AND ROOFS) INTO THE GROUND.
INFILTRATION DEVICES, SUCH AS GRAVEL FILLED TRENCHES, DRYWELLS, AND GROUND SURFACE DEPRESSIONS,
FACILITATE THIS PROCESS BY PUTTING RUNOFF IN DIRECT CONTACT WITH THE SOIL AND HOLDING THE RUNOFF
LONG ENOUGH TO SOAK MOST OF IT INTO THE GROUND. TO BE SUCCESSFUL, THE SOIL CONDITION AROUND THE
INFILTRATION DEVICE MUST BE ABLE TO SOAK WATER INTO THE GROUND FOR A REASONABLE NUMBER OF YEARS.
THE INFILTRATION DEVICES USED ON THIS PROPERTY INCLUDE THE FOLLOWING AS INDICATED ON THE FLOW
CONTROL BMP SITE PLAN: X GRAVEL FILLED TRENCHES, ❑ DRYWELLS. THE SIZE, PLACEMENT, AND
COMPOSITION OF THESE DEVICES AS DEPICTED BY THE FLOW CONTROL BMP SITE PLAN AND DESIGN DETAILS
MUST BE MAINTAINED AND MAY NOT BE CHANGED WITHOUT WRITTEN APPROVAL THE CITY OF RENTON OR
THROUGH A FUTURE DEVELOPMENT PERMIT FROM CITY OF RENTON.
INFILTRATION DEVICES MUST BE INSPECTED ANNUALLY AND AFTER MAJOR STORM EVENTS TO IDENTIFY AND
REPAIR ANY PHYSICAL DEFECTS. MAINTEANANCE AND OPERATION OF THE SYSTEM SHOULD FOCUS ON ENSURING
THE SYSTEM'S VIABILITY BY PREVENTING SEDIMENT -LADEN FLOWS FROM ENTERING THE DEVICE. EXCESSIVE
SEDIMENTATION WILL RESULT IN A PLUGGED OR NON-FUNCTIONING FACILITY. IF THE INFILTRATION DEVICE HAS A
CATCH BASIN, DEDIMENT ACCUMULATION MUST BE REMOVED ON A YEARLY BASIS OR MORE FREQUENTLY IF
NECESSARY. PROLONGED PONDING AROUND OR ATOP A DEVICE MAY INDICATE A PLUGGED FACILITY. IF THE
DEVICE BECOMES PLUGGED, IT MUST BE REPLACED. KEEPING THE AREAS THAT DRAIN TO INFILTRATION DEVICES
WELL SWEPT AND CLEAN WILL ENHANCE THE LONGEVITY OF THESE DEVICES. FOR ROOFS, FREQUENT CLEANING
OF GUTTERS WILL REDUCE SEDIMENT LOADS TO THESE DEVICES.
i, PUBLIC WORKS
! DEPARTMENT I FLOW CONTROL BMP DETAILS
DATE: 8-15-2018