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Home My WebLink AboutC_DeclerationofCovenant_Voyager31st_230526_V7431 of 7 B22002722 PR22-000111 V.7 RECEIVED 08/18/2023KJPeterson BUILDING DIVISION exhibit and maintenance instructions do not match drainage plan depicted in file P_VOYAGER31STDRAINAGE_230810_V7. as a condition of approval, prior to building permit final, applicant shall provide a revised declaration of covenant to the buliding permit project manager for review and approval by the development engineering plan reviewer, that provides exhibits consistent with the proposed drainage plans. note recording fee invoice will be prepared and provided upon satisfaction of condition 432 of 7 B22002722 PR22-000111 V.7 RECEIVED 08/18/2023KJPeterson BUILDING DIVISION 433 of 7 B22002722 PR22-000111 V.7 RECEIVED08/18/2023KJPeterson BUILDING DIVISION MAINTENANCE INSTRUCTIONS FOR BASIC DISPERSION Your property contains an on-site BMP (best management practice) called “basic dispersion,” which was installed to mitigate the stormwater quantity and quality impacts of some or all of the impervious surfaces or non-native pervious surfaces on your property. Basic dispersion is a strategy for utilizing any available capacity of onsite vegetated areas to retain, absorb, and filter the runoff from developed surfaces. This on-site BMP has two primary components that must be maintained: (1) The devices that disperse runoff from the developed surfaces and (2) The vegetated area over which runoff is dispersed. Dispersion Devices The dispersion devices used on your property include the following as indicated on the site plan (CHECK THE BOX(ES) THAT APPLY): splash blocks,  rock pads,  gravel filled trenches,  sheet flow. MAINTENANCE RESTRICTIONS The size, placement, composition, and downstream flowpaths of these devices as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES This on-site BMP has two primary components that must be maintained per Appendix A of the City of Renton’s Surface Water Design Manual: (1)The devices that disperse runoff from the developed surfaces and (2)The vegetated flowpath area over which runoff is dispersed. Maintenance of Dispersion Devices •Dispersion devices must be inspected annually and after major storm events to identify andrepair any physical defects. •When native soil is exposed or erosion channels are present, the sources of the erosion orconcentrated flow need to be identified and mitigated. •Concentrated flow can be mitigated by leveling the edge of the pervious area and/or realigningor replenishing the rocks in the dispersion device, such as in rock pads and gravel filled trenches. Maintenance of Vegetated Flowpaths •The vegetated area over which runoff is dispersed must be maintained in good condition free of bare spots and obstructions that would concentrate flows. 23 of 434 of 7 X B22002722 PR22-000111 V.7 RECEIVED 08/18/2023 KJPeterson BUILDING DIVISION TYPICAL SPLASH BLOCK TYPICAL 10-FOOT DISPERSION TRENCH CROSS-SECTION TYPICAL DRIVEWAY APPLICATION OF DISPERSION TRENCH AND ROCK PAD SIDE VIEWNTS HOUSE DOWNSPOUTEXTENSION SPLASHBLOCK ROOF DOWNSPOUT SPLASH BLOCK 100' MIN. VEGETATEDFLOWPATH UNDERFULL DISPERSION,SEE SECTION C.2.1.3 10-foot long dispersion trench Vegetated Flowpath Segment (NVFS) Slot drain Diagonal asphalt berm – 2 to 4 inches high PLAN VIEW OF DRIVEWAY NTS 2-ft x 3-ft x 6-inch crushed rock pad 50-foot separation betweenflowpath segments Vegetated Flowpath Segment Edge of undisturbed native vegetation 25 of 43 5 of 7 B22002722 PR22-000111 V.7 RECEIVED08/18/2023KJPeterson BUILDING DIVISION MAINTENANCE INSTRUCTIONS FOR A PERFORATED PIPE CONNECTION Your property contains an on-site BMP (best management practice) called a “perforated pipe connection,” which was installed to reduce the stormwater runoff impacts of some or all of the impervious surface on your property. A perforated pipe connection is a length of drainage conveyance pipe with holes in the bottom, designed to “leak” runoff, conveyed by the pipe, into a gravel filled trench where it can be soaked into the surrounding soil. The connection is intended to provide opportunity for infiltration of any runoff that is being conveyed from an impervious surface (usually a roof) to a local drainage system such as a ditch or roadway pipe system. This on-site BMP shall be maintained per Appendix A of the City of Renton’s Surface Water Design Manual. MAINTENANCE RESTRICTIONS •The size and composition of the perforated pipe connection as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. •The soil overtop of the perforated portion of the system must not be compacted or covered with impervious materials. RECORDING REQUIREMENT These perforated pipe connection on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.1.3.4 of the City of Renton Surface Water Design Manual. The intent of these instructions is to explain to future property owners, the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum; the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton’s Surface Water Design Manual website for additional information and updates. TYPICAL PERFORATED PIPE CONNECTION FOR A SINGLE FAMILY RESIDENCE 38 of 436 of 7 B22002722 PR22-000111 V.7 RECEIVED 08/18/2023 KJPeterson BUILDING DIVISION 15' - 1 31/32"5' - 0"5' - 0" 16' - 0"2' - 0"10' - 0" www.autodesk.com/revit Scale Date Drawn By Checked By Project Number SGCI 1/8" = 1'-0"12/7/2022 9:34:11 PMD1 Checker Author Issue Date Project Number No. Description Date 1/8" = 1'-0"1 Site DS DS DS DS TYPE 1 CATCH BASIN RIM:122.00IE:121.00IE:120.50 (E) TYPE 1 CB -PER COR STD PLAN 200 W/ VANED GRATE RIM RIM: 120.96' IE: 119.34' 12" CP (W) IE: 119.42' 12" CP (E) Property Overview: VOYAGER 31ST Parcel Number: 3342101725 Lot Sq. Ft.: 5,025.00 DRIVEWAY 16' MAX GAR ELV: 121.00 FF ELV: 122.00 IMPERVIOUS SURFACE AREA CALCULATIONS NEW/REPLACED IMPERV. AREA (SF): 3,263 SF PERFORATED PIPE CONNECTION 2' X 10' DISTRUBED AREA (SF): 5,025 SF. ON-SITE BMP(S)USED: PERF PIPE CONNECTION TOTAL AREA: 3,266/5025 (NET) 65 PERCENT (65% ALLOWED) 6"PVC -TYP INSTALLATION OF A DOWNTURN ELBOW DS DS DS DS ADDRESS: 1002 N 31ST ST. RENTON WA 98056 N.31ST ST. 42 of 43 7 of 7 B22002722 PR22-000111 V.7 RECEIVED 08/18/2023KJPeterson BUILDING DIVISION