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Home My WebLink AboutR-406806A PORTION OF THE NW 1/4 OF SECTION 8, TOWNSHIP 23N, RANGE 5E, W.M. O Cfl 00 1 1 0 V I I I DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878 I Q I I IZIPI DocuSign Envelope ID: 6EECF566-602A-4E4A-B436-A317AA638878 I I I 5„ MAX. I I DRAINAGE GRATE TRIM —�--� JOINTS IN FILTER FABRIC SHALL BE SPLICED AT I 6Ft.Tempcarary POSTS. USE STAPLES, WIRE RINGS, OR EQUIVALENT TO ATTACH FABRIC TO POSTS GRATE FRAME _ 1 Chain Llnkftr" I _ OVERFLOW BYPASS d Z�J�I OyD4t _ ZDn 0 � r 2"x2" 14 GAUGE WIRE, OR EQUIVALENT, IF STANDARD BELOW INLET GRATE DEVICE .pDPs t -_ _ a00TL STRENGTH FABRIC USED z ar+e slip Per 501(set TRESSPASSING FILTER FABRIC 2' MIN. SEDIMENT AND DEBRIS ;.�. E, W _ (minimumfll 2 signs) PROMECTED 1Ft TREES / .\\\\�� FILTERED WATER w Figure 1- TREE PROTECTION FENCE DETAIL. DRIPLINE METHOD 1I W I 6' MAX. I I I �\N. POST SPACING MAY BE INCREASED I 12" MIN. 4"x4" MIN. TRENCH I� I TO 8' IF WIRE BACKING IS USED I I I Q TREE PROTECTION MEASURES DURING CONSTRUCTION BACKFILL TRENCH WITH NATIVE SOIL Li OR 3/4"TO 1-1/2" WASHED GRAVEL A. CONSTRUCTION STORAGE PROHIBITED: THE APPLICANT MAY NOT FILL, EXCAVATE, STACK OR STORE ANY 2"x4" WOOD POSTS, STEEL FENCE POSTS, OR EQUIVALENT (TYP.) Q EQUIPMENT, DISPOSE OF ANY MATERIALS, SUPPLIES OR FLUIDS, OPERATE ANY EQUIPMENT, INSTALL SECTION VIEW IMPERVIOUS SURFACES, OR COMPACT THE EARTH IN ANY WAY WITHIN THE AREA DEFINED BY THE DRIP LINE OF ANY TREE TO BE RETAINED. DRAINAGE GRATE (RECTANGULAR GRATE SHOWN) RETRIEVAL SYSTEM (TYP.) B. FENCED PROTECTION AREA REQUIRED: PRIOR TO DEVELOPMENT ACTIVITIES, THE APPLICANT SHALL O ERECT AND MAINTAIN SIX-FOOT (6') HIGH CHAINLINK TEMPORARY CONSTRUCTION FENCING AROUND THE DRIP LINES OF ALL RETAINED TREES OR AT A DISTANCE SURROUNDING THE TREE EQUAL TO ONE AND 0 ONE -QUARTER FEET (1-1/4') FOR EVERY ONE INCH (1") OF TRUNK CALIPER, WHICHEVER IS GREATER, OR NOTES: ALONG THE PERIMETER OF A TREE PROTECTION TRACT. PLACE CARDS SHALL BE PLACED ON FENCING 1. CONDITIONS OF USE EVERY FIFTY FEET (50'). SITE ACCESS TO INDIVIDUALLY PROTECTED TREES OR GROUPS OF TREES SHALL 1.1. SILT FENCE MAY BE USED DOWNSLOPE OF ALL DISTURBED AREAS. BE FENCED AND SIGNED. INDIVIDUAL TREES SHALL BE FENCE ON FOUR (4) SIDES. IN ADDITION, THE 1.2. SILT FENCE IS NOT INTENDED TO TREAT CONCENTRATED FLOWS, NOR IS IT INTENDED TO TREAT SUBSTANTIAL AMOUNTS OF OVERLAND FLOW. ANY CONCENTRATED FLOW MUST BE CONVEYED THROUGH THE DRAINAGE SYSTEM TO A SEDIMENT TRAP OR POND. O APPLICANT SHALL PROVIDE SUPERVISION WHENEVER EQUIPMENT OR TRUCKS ARE MOVING NEAR TREES. 2. DESIGN AND INSTALLATION SPECIFICATIONS OVERFLOW BYPASS(TYP.) r ) 2.1. THE GEOTEXTILE USED MUST MEET THE STANDARD LISTED BELLOW. A COPY OF THE MANUFACTURER'S FABRIC SPECIFICATIONS MUST BE AVAILABLE ON SITE. C. PROTECTION FRO GRADE CHANGES: IF THE GRADE LEVEL ADJOINING TO A TREE TO BE PROTECTED IS TO BE RAISED, THE APPLICANT SHALL CONSTRUCT A DRY ROCK WALL WELL AROUND THE TREE. THE ADS (ASTM D4751) 30-100SIEVESIZE(0.60-0.15mm)FOR SILT FILM 50-100SIEVESIZE(0.30-0.15mm)FOROTHERFABRICS BELOW INLET GRATE DEVICE WATER PERMITTIVITY (ASTM D4491) 0.02 SEC -' MINIMUM DIAMETER OF THIS WALL OR WELL MUST BE EQUAL TO THE TREE'S DRIP LINE. GRAB TENSILE STRENGTH (ASTMD4632) 180LBS.MIN. FOR EXTRASTANDARD STRENGTH NGTHFABRIC TRENGTH IC D. IMPERVIOUS SURFACES PROHIBITED WITHIN THE DRIP LINE: THE APPLICANT MAY NOT INSTALL ISOMETRIC VIEW GRAB TENSILE ELONGATION (ASTM D4632) 30%MAX. (WOVEN) ULTRAVIOLET RESISTANCE (ASTM D4355) 70%MIN. IMPERVIOUS SURFACE MATERIAL WITHIN THE AREA DEFINED BY THE DRIP LINE OF ANY TREE TO BE 2.2. STANDARD STRENGTH FABRIC REQUIRES WIRE BACKING TO INCREASE THE STRENGTH OF THE FENCE. WIRE BACKING OR CLOSER POST SPACING MAY BE REQUIRED NOTES: RETAINED. FOR EXTRA STRENGTH FABRIC IF FIELD PERFORMANCE WARRANTS A STRONGER FENCE. 2.3. WHERE THE FENCE IS INSTALLED, THE SLOPE SHALL NOT BE STEEPER THAN 2H:1V 1. PROTECTION SHALL BE PROVIDED FOR ALL STORM DRAIN INLETS DOWNSLOPE AND WITHIN 500 FEET OF A DISTURBED OR 2.4. IF A TYPICAL SILT FENCE IS USED, THE STANDARD 4"X4" TRENCH MAY BE REDUCED AS LONG AS THE BOTTOM 8 INCHES OF THE SILT FENCE FABRIC IS WELL BURIED AND CONSTRUCTION AREA, UNLESS THE RUNOFF THAT ENTERS THE CATCH BASIN WILL BE CONVEYED TO A SEDIMENT POND OR TRAPSCURE IN A TENCH THAT. E. RESTRICTIONS ON GRINDING WITHIN THE DRIP LINES OF RETAINED TREES: THE GRADE LEVEL AROUND 2.5. FIILTERFABRIC FENCESSHALL BEIINSTALLED ALONG CON OBE THE FENCE AND DOES NOT ALLOW WATERCONTOURS WHENEVER 2. INLET PROTECTION SHALL BE USED TO PROTECT THE DRAINAGE SYSTEM. ANY TREE TO BE RETAINED MAY NOT BE LOWERED WITHIN THE GREATER OF THE FOLLOWING AREA: (1) 3. MAINTENANCE STANDARDS 3. THE CONTRIBUTING DRAINAGE AREA MUST NOT BE LARGER THAN ONE ACRE. THE AREA DEFINED BY THE DRIP LINE OF THE TREE, OR (2) AN AREA AROUND THE TREE EQUAL TO ONE 3.1. ANY DAMAGE SHALL BE REPAIRED IMMEDIATELY. 4. SIZE THE BELOW INLET GRATE DEVICE (BIGD) FOR THE STORMWATER STRUCTURE IT WILL SERVICE. 3.2. IF CONCENTRATED FLOWS ARE EVIDENT UPHILL OF THE FENCE, THEY MUST BE INTERCEPTED AND CONVEYED TO A SEDIMENT TRAP OR POND. AND ONE-HALF FEET (1-1/2') IN DIAMETER FOR EACH ONE INCH (1") OF TREE CALIPER. A LARGER TREE 3.3. ITISIMPORTANTTOCHECKTHEUPHILLSIDEOFTHEFENCEFORSIGNSOFTHEFENCECLOGGINGANDACTINGASABARRIERTOFLOWANDTHENCAUSING SE>IMEN MUSTN EOF FLOWS PARALLEL TO THE REM VED WHEN SEDIMENT IS 6 IINIF CHESIHIGHCURS, REPLACE THE FENCE OR REMOVE THE TRAPPED SEDIMENT. 5. THE BIGD SHALL HAVE ABUILT-IN HIGH -FLOW RELIEF SYSTEM (OVERFLOW BYPASS). PROTECTION ZONE BASED ON TREE SIZE, SPECIES, SOIL, OR OTHER CONDITIONS MAY BE REQUIRED. 3.4. 3.5. IF THE FILTER FABRIC (GEOTEXTILE) HAS DETERIORATED DUE TO ULTRAVIOLET BREAKDOWN, IT SHALL BE REPLACED. 6. THE RETRIEVAL SYSTEM MUST ALLOW REMOVAL OF THE BIGD WITHOUT SPILLING THE COLLECTED MATERIAL. F. MULCH LAYER REQUIRED: ALL AREAS WITHIN THE REQUIRED FENCING SHALL BE COVERED COMPLETELY 7. PERFORM MAINTENANCE IN ACCORDANCE WITH STANDARD SPECIFICATION 8-01.3(15). AND EVENLY WITH MINIMUM OF THREE INCHES (3") OF BARK MULCH PRIOR TO INSTALLATION OF THE 8. ANY SEDIMENT IN THE CATCH BASIN INSERT SHALL BE REMOVED WHEN THE SEDIMENT HAS FILLED ONE-THIRD OF THE AVAILABLE STORAGE. THE FILTER MEDIA FOR THE INSERT SHALL BE CLEANED OR REPLACED AT LEAST MONTHLY. PROTECTIVE FENCING. EXCEPTIONS MAY BE APPROVED IF THE MULCH WILL ADVERSELY AFFECT UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS) UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS) PROTECTED GROUND COVER PLANTS. PUBLIC WORKS[PPROYIPE): STD. PLAN - 214.00 APPRED: STD. PLAN - 216.30 V11,R) G. MONITORING REQUIRED DURING CONSTRUCTION: THE APPLICANT SHALL RETAIN A CERTIFIED ARBORIST DEPARTMENT SILT FENCE GAZ 9/28/2018 :45 APUBLIC WORKS CATCH BASIN INSERT 9/28/2018 I :45 AP OR LICENSED LANDSCAPE ARCHITECT TO ENSURE TREES ARE PROTECTED FROM DEVE,LOPMENT Public Works Administrator DATE DEPARTMENT GAZ ACTIVITIES AND/OR TO PRUNE BRANCHES AND ROOTS, FERTILIZE, AND WATER AS APPROPRIATE FOR ANY Public Works Ad—i—to, DATE TREES AND GROUND COVER THAT ARE TO BE RETAINED. NTS NTS NTS NTS Not Used Tree Protection 2 Silt Fence 3 Catch Basin Insert 4 1' OVERFLOW DEPTH OUTFLOW TOE IN SHEETING IN 4"x4" BUILDING PAD CHANNEL IF TRENCH A MINIMUM OF 8' V DEPTH 2" 4" ROCK 4' MIN CONSTRUCTED BY SETBACK FROM TOP OF 10' MAX CONVEY RUNOFF 2' SETTLING DEPTH EXCAVATION SLOPE. BACKFILL WITH APPROVED LOCATION WASHED ROCK MIN 4' SETBACK 1 �FILTER FABRIC 1 FROM TOP OF SLOPE �� FENCING 10' MAX 1.5' SEDIMENT STORAGE 5' MAX V DEPTH 3/4" - 1-1/2" WASHED GRAVEL CROSS SECTION NITS 3' MIN OVERFLOW SPILLWAY U MIN WIDTH 11 _ —=1 I-1 I-1 a I TERMINATE AT LEVEL AREA. FOLD oUNDER 4" AND STAPLE AT 12" INTERVALS PROVIDE ENERGY DISSIPATION III=III= A =III AT TOE WHEN NEEDED I-1 = III=III=III=111— II-111-1 NOTES: II II II II II II III 111. TIRES, SANDBAGS, OR EQUIVALENT MAY BE USED TO WEIGHT PLASTIC SHEETING. R'"� 0 � � 0 1.5' SEDIMENT STORAGE 2. SEAMS BETWEEN SHEETS MUST OVERLAP A MINIMUM OF 12" AND BE WEIGHTED OR TAPED. 2' SETTING DEPTH & V DEPTH OF 2" 4" ROCK, IN COMPLIANCE WITH CITY OF RENTON STANDARDS V DEPTH OF 3/4" - 1/2" WASHED GRAVEL 3. PLASTIC SHEETING SHALL HAVE A MINIMUM THICKNESS OF 6 MIL. CONSTRUCTION RECORD DRAWING 4. DUE TO RAPID RUNOFF CAUSED BY PLASTIC SHEETING, THIS METHOD SHALL NOT BE USED UPSLOPE OF AREAS THAT MIGHT BE ADVERSELY IMPACTED BY CONCENTRATED RUNOFF. This construction record drawing is a copy of a cad file prepared by COUGHLIN PORTER LUNDEEN and has been edited to reflect field NOTE: 5. IF EROSION AT THE TOE OF SLOPE IS LIKELY, A GRAVEL BERM, RIP -RAP, OR OTHER SUITABLE PROTECTION verified invert and rim elevations of the storm, sanitary sewer and water SHALL BE INSTALLED AT THE TOE OF SLOPE IN ORDER TO REDUCE THE VELOCITY OF RUNOFF. main systems. Field verified invert and rim elevations were obtained by KLB CONSTRUCTION IN JUNE 2022 NTS MAY BE CONSTRUCTED BY EXCAVATION OR BY BUILDING A BERM NTS NTS The on -site private storm drainage facilities and public/private water and B BRA Not Used 5 Sediment Trap 6 Weighted Plastic Sheeting 7 sewer systems were installed in accordance with the approved plans and O� WA�ti r P g g the documented field revisions and function as intended. o � �� rr� �, SURVEYED: SCALE: DATE: %y RECORD DRAWINGS 07 08 22 TRs HORIZONTAL*I'P D 11988 983/1991 04 30 2021 IPTENW DESIGNED: AS SHOWNCITY OF PARK AVENUE NORTH EXTENSION / / COUGHLINPORTERLUNDEEN RAG [*`] RENTON, WASHINGTON PAGE: OK: Transportation Engineering Northwest RENTON PAGE. p� �,�'33708 E� �v p g g STRUCTURAL CIVIL SEISMIC ENGINEERING °�W"` PRW DRAWING NO: �_ C`I S TFR Transportation Planning I Design I Traffic Impact & Operations ONE INCH DATU M 11400 SE 8th Street, Suite 200, Bellevue, WA 98004 S/ANAL F� /nn Office (425) 889-6747 801 SECOND AVENUE, SUITE 900 (206) 343AT FULL SCALE Planning/Building/Public Works Dept. TES: DETAILS — SEATTLE, WA 98104 www.cplinc.com CHECKED: c.com BSB IF NOT ONE INCH Project Contact: Elyse Stemmler, P.E. NO. REVISION BY DATE APPR APPROVED: SCALE ACCORDINGLY SHEET: 6 OF: 30 V Phone: 425-250-5004 C„M N N O O T LJ N 00 O O I T 0 U) z w X w w Q i Q 0 0