The URL can be used to link to this page

Home My WebLink AboutEX06_Staff_AnalysisScale : Update Date : Page Size : Site Contact Phone # Site Address : Drawing Number : Drawing Description : 1/8" = 1' Concept Drawing 1 of 1 Designer : 425.979.1933 GENERAL DRAWING NOTES: All measurements, heights, and dimensions given are subject to verification by installing contractor and property owner. Every attempt to insure the accuracy of this drawing has been made by Oquist Landscape Design. However, all parties should be aware that minor changes may be needed once construction begins for the proper completion of this design. No drawing created by Oquist Landscape Design should be considered binding plans or agreements between a contractor or property owner. Any and all permits required for the completion of this design are the responsibility of the property owner, and or licensed contractor(s). Update # Hirani Residence 24" x 36" 9 20'-0" 16'-0" 4'-0"2'-0"2'-0" 10'-0"6'-0" 1928Drawing #Issue Date :2/25/2021 11/11/2021 Site Contact Person : Property Owner # Property Owner : DRAWING NOTES: All Steps have 6" Risers Unless Otherwise Noted Some dimensions have been rounded to the nearest 6" for readability and estimating purposes. Artificial Turf Decorative Aggregate Planting Bed Creeping Red Fescue Block Retaining Wall Seat Wall (20" Sitting Height) Paver Patio Or Landing Existing Deck Existing Rock Retaining Wall Existing Asphalt Driveway Existing Concrete Step or Wall Light 20'-0" 6'-0"3'-0"4 ' - 0 " 8 ' - 0 " 11'-0" 4'-0" 9 ' - 0 " 12'-0" 4 ' - 0 " 4'-0" Prop. Line Prop. Line French Drain Seat Wall 20" WALL 1 : Up to 4'-0" WALL 2 : Up to 4'-0" WALL 3 : 1'-0" WALL 4 : 4'-0" WALL 5 : 4'-0" WALL 6 : Up to 4'-0" 4'-0" 12'-0" 1 2 ' - 0 " 4 ' - 0 " Existing Rockery to Remain as is Existing Rockery to Remain as is 1,830 sf 426 sf 1,077 sf 82 sf 0 sf 1,498 sf 52 sf 594 sf 1,682 sf 958 sf Drawing Notes: Square footage estimates are for materials inside property lines only. If any dimensions are in conflict with recent survey, survey is considered more accurate and will supersede this drawing. If any dimensions are in conflict with engineered drawing, engineered drawing is considered more accurate and will supersede this drawing. 2708 Williams Ave North Renton WA 98056 425.830.2387 Rick, Hirani 4 ' - 0 " 13'-6" A/C Unit EXHIBIT 6 show and add wall drains to connect the stormwater conveyance system for all retaining walls per page 9 of geotechinical report. the purpose of the wall drains is to collect and redirect rainwater away from the wall to decrease pressure on the soil around the wall to reduce erosion and settlement. per tesc plan sheet, the retaining walls are 5' tall, adjust the height/location of the walls to be consistent throughout the plan. if the proposed retaining wall is taller than 4', a building permit is required per rmc 4-4-040, contact permittech@rentonwa.gov to apply a building permit for the retaining wall Snip of information from the Clover Creek plat, 4,779 sf 180.3 sf 90.2 sf 99.6 sf 156.8 sf 63.1 sf Staff comment: Shared access and wet vault easement is approximately 2,343.5 sf Markup Legend RED Required Revisions BLUE Recommended Revisions PURPLE Advisory Only RECEIVED 02/24/2022 BGillia PLANNING DIVISION DocuSign Envelope ID: 39AA7884-9374-44CF-BC0D-81C1EAEEE31F WILLIAMS AVENUE NORTHNOTES: 1. BASE MAP REFERENCE: TOUMA ENGINEERS AND LAND SURVEYORS, PLLC, 2708 WILLIAMS AVE N, SURVEY WORKSHEET 12/2019, SIGNED 2/4/20. TESC NOTES: 1. EARTHWORK SHALL BE LIMITED TO SEASONALLY DRIER PERIOD OF THE YEAR BETWEEN APRIL 1ST TO OCTOBER 31ST. 2. CLEARING SHALL BE MINIMIZED TO THE EXTENT POSSIBLE AND CLEARING LIMITS SHALL BE MARKED BY SILT FENCING. 3. DISTURBED AREAS UNWORKED FOR MORE THAN 2 DAYS SHALL BE COVERED WITH PLASTIC SHEETING OR STRAW MULCH. 4. SILT FENCE SHALL BE USED ALONG PERIMETER OF THE SITE FOR SEDIMENT RETENTION AND SURFACE WATER FLOW PER DEFINITION OF “SMALL AREA” IN 2017 RENTON SURFACE WATER DESIGN MANUAL, APPENDIX D, SECTION D.1.2.3 CSWPP / ESC CONTACT: STEPHEN SIEBERT, P.E. 425-786-3612 APPLICANT: SHEZAN AND ASHIFA HIRANI 2708 WILLIAMS AVENUE NORTH RENTON, WASHINGTON 98056 425-830-2387 PARCEL: 1644500170 ADDRESS: 2708 WILLIAMS AVENUE NORTH RENTON, WASHINGTON 98056 SECTION / TOWNSHIP / RANGE: 05-23N-05E BENCHMARK / DATUM: NAVD88 190438 Hirani \ 20190438E001 F1 TESC .cdrHIRANI RESIDENCE RENTON, WASHINGTON CSWPP PROJ NO.DATE:FIGURE: 20190438E001 2/22 1 BLACK AND WHITE REPRODUCTION OF THIS COLOR ORIGINAL MAY REDUCE ITS EFFECTIVENESS AND LEAD TO INCORRECT INTERPRETATION. a s s o c i a t e d e a r t h s c i e n c e s i n c o r p o r a t e d FEET 10 200 N CONTOUR INTERVAL = 2’ LEGEND: NOTE: LOCATION AND DISTANCES SHOWN ARE APPROXIMATE. ENTIRE SITE WITHIN EROSION HAZARD AREA EXISTING CONCRETE DRIVEWAY EXISTING ASPHALT DRIVEWAY EXISTING RO C K E R Y T O REMAIN EXISTING R O C K E R Y T O REMAI N EXIST I N G R O C K E R Y T O REM A I N EL=110EL=100EL=91E L = 1 0 0 EL=128EL=122EL=93EXISTING WALLS AND STAIRS TO BE REMOVED - BLOCKS TO BE REUSED - TYP SIL T FEN C E - M A R K AS CL E A R I N G L I M I T EXHIBIT 6 delete the silt fence at the high point of the site a building permit is required for retaining wall to be taller than 4' per rmc 4-4-040, contact permittech@rentonwa.gov to apply a building permit for the retaining wall RECEIVED 02/24/2022 BGillia PLANNING DIVISION DocuSign Envelope ID: 39AA7884-9374-44CF-BC0D-81C1EAEEE31F PROJECT NARRATIVE a. Project name, size and location of site: The project will be known as the Hirani Residence Retaining Wall. The site located at 2708 Williams Avenue in Renton, Washington encompasses 9,294 square feet and is occupied by an existing single-family residence. b. Zoning Designation of site and adjacent properties: The site is zoned for residential use and is bounded to the north and south by single-family residences, to the west by a cul- de-sac, and to the east by an undeveloped tract owned by the homeowner’s association (HOA) of the subdivision. c. Current use of the site and any existing improvements: The lot is occupied by a single- family residence. The lot comprises a relatively level portion where the residence is situated, western-sloping driveway, and backyard containing partially constructed terraced wall composed of PisaLite® blocks. A rockery wall up to about 10 feet tall is located near the northern property boundary. A rockery wall up to about 6 feet tall is located near the southern property boundary. The terraced walls are situated between the two rockery walls. d. Special Site Features: According to the City of Renton (City), the site contains regulated slopes classified as landslide hazard areas and erosion hazard areas. e. Soil Type and Drainage Conditions: Subsurface conditions on the project site were inferred from the field explorations conducted for a geotechnical engineering study of the site, visual reconnaissance of the site, and a review of applicable geologic literature. Subsurface explorations advanced encountered fill, recessional outwash, and glacial till. The native deposits encountered are in general agreement with mapped geologic conditions presented on the regional geologic map (Geologic Map of King County, Washington, Booth, Troost, and Wisher, GeoMap NW, March 2007) which indicates that the area is underlain by Vashon recessional outwash and glacial till. The interpretation of the sediments encountered in the explorations agrees with the referenced geologic map. Groundwater was not observed in the exploration borings completed for this project at the time of drilling in January 2020. However, it should be noted that perched groundwater seepage may occur during the winter and spring months. Perched groundwater occurs when surface water infiltrates down through relatively permeable soils such as the lodgement till and becomes trapped or “perched” atop a comparatively impermeable barrier. This infiltration can occur at great distances from the area where the groundwater is encountered. It should be noted that fluctuations in the level of the groundwater may occur due to the time of year and variations in the amount of rainfall. The quantity and duration of flow from excavations made into the perched zone will vary depending on season, topography, and soil grain size. EXHIBIT 6 RECEIVED 02/24/2022 BGillia PLANNING DIVISION DocuSign Envelope ID: 39AA7884-9374-44CF-BC0D-81C1EAEEE31F f. Proposed use of the property and scope of the proposed development: The use of the property will remain unchanged as a single-family residence. Improvement plans to the property will involve removal of the existing non-engineered gravity block walls and reconstruction of two engineered gravity block walls up to 4 feet tall (exposed height) using the existing PisaLite blocks and no-fines concrete (NFC) backfill. Improvement plans will also include installation of new pavers for patio and walkways, decorative aggregate, artificial turf between the terraced walls and sloping ground above the existing 10-foot- tall rockery wall along the northern property boundary, and planting beds. The amount of existing impervious area is about 4,401 square feet and proposed additional impervious area is about 4,041 square feet. g. Proposed off-site improvements: None h. Total estimated construction cost and estimated fair market value of the proposed project: $100,000 i. Estimated quantities and types of materials involved if any fill or excavation is proposed: Excavation of site soils for upper and lower block walls: 54 cubic yards Wall backfill reusing site soils: 12 cubic yards Controlled density fill for structural keyway below lower wall: 25 cubic yards No-fines concrete wall backfill for upper and lower walls: 20 cubic yards j. Number, type and size of trees to be removed: No trees are present in the area of the planned improvements. k. Explanation of any land to be dedicated to the City: Not applicable EXHIBIT 6 per tesc plan sheet, the retaining walls are 5' tall, adjust the height/location of the walls to be consistent throughout the plan and description. if the proposed retaining wall is taller than 4', a building permit is required per rmc 4-4-040, contact permittech@rentonwa.gov to apply a building permit for the retaining wall DocuSign Envelope ID: 39AA7884-9374-44CF-BC0D-81C1EAEEE31F November 29, 2021 City of Renton | CED | Planning Division 1055 South Grady Way, 6th Floor Renton, Washington 98057 Attention: Brittany Gillia, Assistant Planner Subject: Letter of Understanding Hirani Residence Retaining Wall 2708 Williams Avenue North Renton, Washington Dear Ms. Gillia: In accordance with the Variance Submittal requirements, we are submitting this letter to the City, with the required plans and specifications for the planned improvements at our property. We understand and accept that we are developing in an environmentally critical area and will advise, in writing, any prospective purchasers of the property of the site improvements of the environmentally critical area development. Planned improvements will involve construction of a tiered retaining wall, and installation of natural and artificial turf, and pavers. The engineered retaining wall has been designed by a Washington State licensed professional engineer to reduce the potential for future issues. The planned improvements will eliminate the site classification as an erosion hazard. Sincerely, ______________________________ Shezan Hirani and Ashifa Nurani EXHIBIT 6 the proposed improvements (e.g., retaining wall, adding artificial turf) may reduce erosion potential somehow, but will not eliminate the site classification as an erosion hazard. RECEIVED 02/24/2022 BGillia PLANNING DIVISION DocuSign Envelope ID: 39AA7884-9374-44CF-BC0D-81C1EAEEE31F