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Home My WebLink AboutW-377101N Ln O O T D N W a: Q 2 2 F- O Z s W Z C-2-21 FULL zNFIL'MATco E_ FLG RE C.21 -A TYPICAL TRENCH LNF1VI'10Vr10_N SCI: Y rE t?I: rcfof drain WM 4" rigib or 6" flexible pedorated pipe ........ ....................... .... , sump w1soiidi lid 4' rigid or 6o f hwible Wbratsd Pipe washed rock 1 1/2'-314' �1 LA—VW"--- fAW fabm 6' t 24- 1 root drain glow splash b l mln, a.�` inirt ' min fine rriesh ' ` C8 sump wh c, id lid or-M401 .......M, compacted backfitN V rigid or 6" flexible perforalled life ............. wR.At*d rock 1 1/2%34* SECTION A .. ............................... NTS ?(M Surface Winer Design ?Manual Apparniix C -4S D TEXT OF INSTRUCTIONS 10i'3009 c�. � , � � ��;.��ax��r�a :3 rs�a� c�r�;�� rc•Yrtc�' Your property contains a stonnwater management flow control BM€' (best management practice) called a 'perforated pipe connection.` which was installed to reduce the stormwater runoff impacts of some or all of rw Wnpervious surface on your property A perforated pipe connection is a length of drainage conveyance pipe wrth 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 sail. 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. The size and composition of the perforated pipe connection as depicted by the flow control BMP site plan and design detaitss must be maintained and may not be changed without written approval either from the King County Water and Land Resources Division or through a future development permit from King County. The soil overtop of the perforated portion of the system must not be compacted or covered with Impervious mawals. FIGURE C.L11.A PERFORATED PIPE CONNECTION FOR A SLNGLE F -MMY RESIDE' ,CE random fill 6" filter fabric 6" ped pipe 18" R1ir, --1,r` ' 3/4" washed rock u Y its F•- 24' min --- TRENCH X- SECTION NTS slope .---.. PLAN VIEW. O.F RAF, HITS ?GU9 Surface w'aff Design 4i:uwal Appenthx c C- #I to road drainage system 2'X10' level trench wiped pipe I tW2009 OFFE ENGINEERS 13932 SOUTHEAST 159TH PLACE RENTON, WASHINGTON 98058 PHONE: 425- 260 -3412 CONTACT: DARRELL OFFE, P.E. A PORTION OF THE NW 1/4, SE 1/4, SECTION 9, TOWNSHIP 23 N., RANGE 5 EAST, W.M., CITY OF RENTON, WASHINGTON ElFOSI ON =IrWW W Er SEASON FtWU1 RBIENTS Sites with exposed soils during the WET SEASON (October 1 to April 30) shall be subject to special erosion control provisions. These special provisions are required in addition to the -d wilard TESC cover measures. Please notify contractor of these requirements All projects that dear, grade or otherwise disturb the site, must provide erosion and segment controls to the maximum extent possible, to prevent the transport of sediment from the project site to downstream drainage facilities, water resources, and adjacent properties. The fallowing provisions for wet season construction are detailed in Appendix D of the 2009 IGng Count Surface Water Manual. Please ensure your site is protected and complies with the special provisions outlined below. The basic requirements are: 1. The allowed time that a disturbed area can remain unworked without cover measures is reduced to two (2) days, rather than seven (7) days. 2. Stockpiles, steep cut, and fill slopes are to be covered or protected with mulch, sod, plastic oovering, jute mat et:;. if left unworked for. more than 12 hours. 3. Cover materials (plastic, matting, etc) sufficient to cover all disturbed areas, shall be stockpiled and available on site. 4. All areas that are to b.. unworked during the wet season shall be seeded within one week of the beginning of the wet season. Seeded should be completed by September 23. 5. Mulch is required to protect all seeded areas. fi. Fifty linear feet of silt fence (and the necessary cakes), per disturbed acre must be stockpiled on site. 7. Property installed silt fencing is mandatory along the downciope of all disturbed areas of the site. Perimeter protection filters runoff and reduces the amount of sediment that may leave the site. 8. Sediment retention is required unless no offsite discharge is anticipated for the specified design flow. 9. Construction read and parking lot stabilization are required for all sites unless the site is underlain by course - grained soil. 10. Surf ace water controls are requ i red unless no offsite discharge is anticipated for the specified design flow. 11. Phasing and more conservative OAPs must be evaluated for construction activity near surface waters. 12. Any runoff generated by dewatering shall be treated through construction of a segment trap when there is sufficient space or by releasing the water to a well vegetated, gently sloping area. Since pumps are used for dewatering, it may be possible to pump the sediment -laden water well away from the surface water so that vegetation can be more effectively utilized for treatment. A straw bale filter shall be placed around the gsd W from the dewatering pump. If there is not space for a sediment trap or 25 feet of suitable vegetation, other filtration methods shall be required. 13. The frequency of maintenance review should be increased from weekly to daily where warranted. MONROE AVE. NORTH INT'X MONUMENT FOUND TACK & LEAD IN MONUMENT CASE STA. 10 +00, NE 7TH STREET I z O ._ _ ... ._.. .......... . 4_ WY .t. �' 1l M N ; v V) 7`. Z wI t (A l 12 STM (PL Co fO O AdIL.•,` O • V j (S3703) STM PV 1 M y DO NSPC Y 10' 15 (Typ.) f A Z � 1 t I N �ri "� M Emir M ■ J CZ • O CO ..j � y y • ' i y y .t •�Y'��1 6.. L O60 Ttxe0 SITE SURVEY d MAPPING SCALE SCALE D.L OFFE, P.E. • z�4so •' D. L OFFE P. E. a+�r • • 0Q /ST0 00 c,- AT FULL Sau.E J /ONAL 01/26/2015 NO. REVISION BY DATE APPR SCALE ACCOMMLY NOTEI EXISTING UTILITY LOCATIONS SHOWN HEREON ARE APPROXIMATE ONLY, IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO DETERMINE THE EXACT VERTICAL AND HORIZONTAL LOCATION OF ALL EXISTING UNDERGROUND UTILIITES PRIOR TO COMMENCING CONSTRUCTION. NO REPRESENTATION IS MADE THAT ALL EXISTING UTILITIES ARE SHOWN HEREON. THE ENGINEER ASSUMES NO RESPONSIBILITY FOR UTILITIES NOT SHOWN OR UTILITIES NOT SHOWN IN THEIR PROPER LOCATION. CALL BEFORE YOU DIG, 811 MAXIMUM 2,600 SQUARE FEET OF IMPERVIOUS SURFACE ALLOWED ON EACH LOT OUTSIDE OF THE ROADWAY EASEMENT AREA. 6" SIDE SEWER PVC(PRIVATE) i ra► ------ 1 I I 1,000 SQUARE FEET Or ROOF AREA INTO EACH INFILTRATION TRENCH ON EAC H LOT W- 377101 NE UICN_ WWD kiss HORMM : W 1983/1191 DATUM R CITY OE RENTON Planning /Building /Public Works Dept. .Y. GRAPHIC SCALE 0 15 30 60 1 inch = 30 feet I y I I /7" RECOMMENDED FOR APPROVAL Byl Datel By, Datel By, Datel Byl Date, NE 7th NORTH PHASE 2 01/26/2015 SCOTT DONOGH HOMES, INC. „�°°" COMPOSITE UTILITY PLAN & BMP'S 3518 NE 7th Street °i:13 UTILITY D Z z� s� Z m D D Z �T T • 1 D I x Z Z 6666 v 1 T �5