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12-100055CITY OF Federal February 8, 2012 Terry Jensen Terry Jensen Construction PO Box 1326 Issaquah, WA 98027 o.. 3 7 i L CITY HALL 33325 8th Avenue South FederaWay l Way, WA 98003-6325 (253) 835-7000 www.cityoffederalway.com RE: FILE #12-100055-00-AD; RESPONSE TO INQUIRY Shelley Stream Reclassification, 29635 20'h Place SW, Federal Way Dear Mr. Jensen: The Department of Community and Economic Development has reviewed your request to reclassify a drainage course adjacent to the subject property from a Major Stream to a Minor Stream and to remove setback requirements from the course that is currently within a culvert. The department finds there is insufficient evidence to reclassify the course to a Minor Stream and denies the request at this time. The department does concur with the findings that stream setback requirements do not apply to the culverted reach. The remainder of this letter summarizes the basis for the conclusion. STREAM DEFINITION AND ANALYSIS Federal Way Revised Code (FWRC) 19.05.190 defines a stream as "a course or route, formed by nature, including those which have been modified by humans, and generally consisting of a channel with a bed, banks or sides throughout substantially all its length, along which surface waters naturally and normally flow in draining from higher to lower elevations. A stream need not contain water year-round. In a development, streams may run in culverts or may be channeled in a concrete, rock or other artificial conveyance system. This definition does not include irrigation ditches, stormwater facilities or other artificial watercourses unless they are used by resident or anadromous salmonid fish, or the feature was constructed to convey a natural stream which existed prior to construction of the watercourse.- Those topographic features that resemble streams but have no defined channels shall be considered streams when hydrologic and hydraulic analyses done pursuant to a development proposal predict formation of a defined channel after development." Analysis — Relief map layers generated by King County iMap services indicate a natural course with elevations beginning at sea -level (north) and headwaters exceeding 200 feet (south). There are no indications this course was artificially constructed for purposes of an irrigation ditch or stormwater facility. Therefore, the channel is considered a Stream as defined by FWRC 19.05.190. MAJOR STREAM DEFINITION AND ANALYSIS FWRC 19.05.130 defines a major stream as "any stream, and the tributaries to any stream, which contains or supports, or under normal circumstances contains or supports, resident or migratory fish. If there exists a natural (emphasis added) permanent blockage on the stream course which precludes the upstream movement of anadromous sahnonid fish, then that portion of the stream which is downstream of the natural permanent blockage shall be regulated as a major stream." Mr. Jensen February 8, 2012 Page 2 Analysis — The reclassification request notes a permanent blockage within an overflow structure and grate assembly precluding upstream movement of salmonids. These blockages are human -made fish impediments and do not qualify as natural permanent blockages. Examples of natural permanent blockage the city considers for stream classification are waterfalls, high gradient stream sections and subsurface flow. The following thresholds developed by the Washington State Department of Fish and Wildlife are used to determine whether the blockages qualify as barriers: Feature Threshold Waterfall 3.7 vertical meters Stream Sustained gradient exceeding 20% for more than 160 continuous meters Channel Sustained gradient exceeding 16% for a distance of 160 meters and having a width less than 0.6 meters measured at scour line. FYDFW 2009 Fish Passage and Surface Water Diversion Screening Assessment and Prioritization Manual CLOSING The department will require sufficient evidence, in the form of a topographic survey prepared by a licensed surveyor reflecting one of the referenced thresholds, prior to any stream reclassification. If you pursue this request, please submit the requested materials to the Permit Center with the enclosed resubmittal form. Please feel free to contact me at 253-835-2638 or matt.herrera ci affederalwa .cam if you have any questions regarding this letter. Sincerely Matthew Herrera Associate Planner enc: Resubmittal Form c: Kari Cimmer, Permit Center Supervisor Robert W Thorpe, AICP and Lee A. Michaelis, AICP, 7438 SE 27`h St., Mercer Island WA 98040 12-100055 Doc, ID, 60230 Mr. Jensen February 8, 2012 Page 3 • i `• , 4, snns. Shelley Property s. ea �' I ' Drainage Course � � i v Relief and topographic data generated by King County iMap services 21212012 12400055 Doc. I.D. 60230 000e3-00-/in R. �NTHORFE & ASSOCIATES, INC. Seattle • Anchorage + Denver ■ Winthrop ❖ Planning I Landscape Architecture I Project Management I Environmental I Economics ❖ PRINCIPALS: Robert W. Thorpe, AICP, President Stephen Speidel, ASLA ASSOCIATES: Lee A. Michaelis, AICP, Senior Associate Lindsay Diallo, RLA, Associate December 28, 2011 RECEIVED Will Appleton, Manager 1AN 0 5 2012 Surface Water Management City of Federal Way CITY )F FEDERAL WAY 33325 81h Avenue South CDS Federal Way, WA 98003 RE: Shelley Property Stream Classification Dear Mr. Appleton: On December 23, 2011, I met with Terry Jensen of Jensen Construction to review and provide my opinion on the water course that is to the east of 201h Place SW, just east of the Shelley Residence located at 29635 201h Place SW. The purpose of the visit was to provide information to Mr. Jensen in classifying the water course as either a Major Stream or Minor Stream as defined in the Federal Way Revised Code (FWRC). Based on the analysis detailed below, it is our opinion that the stream is a Minor Stream and that the appropriate buffer for the open portion of the water course is 50 feet. The portion of the water course that is within the culvert has no stream setback. Article V of Section 15; FWRC The first section of the water course we reviewed was the culvert or piped segment of the water course. Section 15.10.170 of the Shoreline Management Program provides the buffers for major and minor streams as 100 and 50 feet respectively. Section 15.10.170(2) also states that "the stream setback areas established by this section do not apply to any segment of a stream that is presently within a culvert, unless that stream will be taken out of the culvert as part of development of the subject property." This is further supported and duplicated in Section 19.165.010 of the Zoning & Development Code. The proposed construction on the Shelley residence does not propose to daylight the portion of the water course that is within the culvert. Therefore, it is our opinion that the portion of the water course from the overflow structure running north to Puget Sound that is presently within the culvert does not have a required setback. This is depicted on the attached aerial photo. The overflow structure and culvert are also depicted on the attached photos. Major Stream vs. Minor Stream The second portion of the water course we reviewed was the water channel south of the overflow structure and culvert. This portion is also depicted on the photographs attached to this letter. Section 15.05.030 of the Shoreline Management Program and Section 19.05.130 of the Zoning & Development Code define a Major Stream as "any stream, and the tributaries to any stream, which 7438 SE 271h St, Mercer Island WA 98040 1 Tel: 206.624.6239 1 Fax: 206.625.0930 1 E-Mail: rwta@rwta.com •. p:\2011\jensenl2232011 \ opinion letter.doc Shelley Residence Stream Classification December 28, 2011 Page 2 of 5 contains or supports, or under normal circumstances contains or supports, resident or migratory fish. If there exists a natural permanent blockage on the stream course which precludes the upstream movement of anadromous salmonid fish, then that portion of the stream which is downstream of the natural permanent blockage shall be regulated as a major stream." All other streams not meeting this definition would be classified as a "Minor Stream" [15.05.030 & 19.05.130 FWRC]. The second portion of the Major Stream definition would preclude this water course from being a Major Stream. There exists a permanent blockage within the overflow structure and grate that would preclude the upstream movement of anadromous salmonid fish. From this structure going upstream (south) the water course is determined to be a Minor Stream. The downstream portion does not require a setback as previously indicated. The first portion of the Major Stream definition is also relevant to the water course. During our site visit, there was insufficient water flow in the stream to support resident or migratory fish. Late December would be the ideal time of year to provide "normal circumstance" yet in the time of the year that provides the most precipitation, there was insufficient water to support fish. Mr. Jensen also noted that this water course dries up during portions of the year. Based on our site visit and the Federal Way Revised Code, it is our opinion that the portion of the stream that is downstream of the overflow structure is within a culvert and has no required setback. The portion of the stream that is upstream of the overflow structure has limited movement due to the blockage to support migratory or resident fish and therefore is classified as a Minor Stream with a 50 foot setback. These finding are graphically depicted on the attached aerial photo and the site conditions are documents in the attached site photos. If you have any questions about this letter or need additional information from us, please feel free to contact Robert W. Thorpe, AICP or Lee A. Michaelis, AICP at the e-mail addresses or telephone number listed below. Sincerely, R.W. Thorpe & Associates, Inc. Vo W. Thor e, AICP President rwta@rwta.com ee A. Michaelis, AICP r lanning Director lmichaelis@rwta.com Attachments: Stream & Culvert Photos Aerial Photo with Appropriate Setbacks Applied Cc: Terry Jensen, Jensen Construction .• 7438 SE 2711, St, Mercer Island WA 98040 1 Tel: 206. 624.6239 1 Fax: 206.625.0930 1 E-Mail: rwta@rwta.com •. ra f� Y1 R h] ] rT ifeJ •��♦ f it '1 ��Ji *;�S�sc{^ ,h •��. T t � .•r-� ��,til,. �.l rH �`.• Jai .y4: FI y r mh till Ne is • t •� r •• d• .N .• ��`.- � ■ � �;�w' Y•'y.fr` r' � Tit _ '+�"• _ - '. t .S -vim ■'r _'. � A`{i�' '�+-�+R.�� ` •� �� .- •.Y Shelley Residence Stream Classification December 28, 2011 Page 5 of 5 .• 7438 SE 271h St, Mercer Island WA 98040 1 Tel: 206.624.6239 1 Fax: 206.625.0930 1 E-Mail: rwta@rwta.com •. Figure 6 Federal Way Stream Inventory Federal Way Classifications Legend Federal Way Classifications; 9 Major Minor ti NA Notes GIS locations and preliminary stream class cations are based on preliminary exarrinalion of GIS data for road and stream locations. Federal Way data was collected during July 2001 as pan of a URS stream assessment effort. Map may rol show all aveams anti I?krrs wtlhrn She City. Sm.O surlace walar faatom may not be displayed here. Classification points with stars ■ indicate that the classification resulting from stream inventory work was modified based on discussions with City (see Appendix Data Summary Table for City comments). �A 2000 D 2000 4000 Feet J—r, 2, 2= 0121039007 39090 ti 0.121.1.1) 121039108' - )M 290 9 29604 0121039097 0121039088 29641 8937500260 (Q�29810 I S J.6 `I 01 34 8937500250 iJ! 29815 29812 f MCLIFF H 0121039105 8937500240 29823 29824 If ,f 8937500230� 0121039093 29823 I11 fl N 8937500220 �� 0121039092 29844 I! 2244 If 8937500210 �! 29848 0121039125 11 2250 ;W 300TH ST r1' 8937500180 I 0121039101 2323 !! 30011 137500190 30006 RS 15.0 0121039042 29800 0121039094RS I 29849 5mO 0121039004 30005 0121039003 29635 0121039036 29900 0121039032 29926 0121039124 30015 0121039031 30016 124 4 0121039020 29622 0121039113 30016 0121039114 30020 0121039112 30010 RS 15.0 Y! LV lyrl9:IfJ p N � r 067.10490 � N r N 0621049030 o M 0121039120, N N RS 15.0 0121039021 30030 0121039115 0121039046 30024 30028 0050700200 ADELAIDE FOREST ESTATES 012103900 29901 0121039149 0621049044 1445 D621D4 0621049058 29867 0621049052 29869 0621049043 29873 0621049125 29877 06210491`34 515 II 2 f� 5153 J� 29 llI! it 11JJ1 !!II 01;,O6DQ�JrrI!II!1J!III 0 5153200255 1287 51532C 1281 0050500010 30015 RR 2 Appendix B Federal Way Stream Classification Data Summary Location ID Q391A•1 Date Time Observer 112007 11:D0 ANL Upstream Latitude d Longitude d GPS Device Gradient Bnkfi Width 11 47,31704$6 172.4138253 Trimble -_ c20% 5.10 47.37972fi7 122.4137575 Trimble WAS &5 _ _... - 47,318317E 122.3922325 Trmble r4% 2.5 47.3217320 }22.39Q1775 I Trimble_ <12%�CA,_ 47.3261167 122.3885950 Trimb 72.2095 ilA 47.3238467 22, .3813993 Trimple �209i CA Downstream Bnkfl Width ft 5-10 Upstream Channel Type t%lBeJPaal Downstream Channel Type Cli Upslream Substrate Irw �flBHgd p[avd Downstream Substrate muW8ar1 vet d'gre._�.. Flow visible flow visible Now no viable flow CA oR nded,>LoviSlNe_now Flow Est, ..yes _ Water Clear? � CA Alaae Present? CA - - no CA Rsh Apparent Fish Observed?! Habitat? na :-- no Upstream Channel Visible D 20 Downstream Channel Visible fq 30p S00 2Q0 2� Plane Seel Es muplssM _ 0391A-2 8fTMI 12:00 ANL CA n'be l {lPt 2$ --- - J Pi ... FOFfIe/Pdol p3906.1 SISId601 1d:30 ANL 0380�? .8A7MI 14tSQ _ AfJ _ C4 CA CA CA CA CA G4 CA D 0 G4 CA no CA 1 D 70 0 _€ - CA - - no CR ?5 Pond CA mud/sand 034pG1 8JT'2W7 7530 ANL CA CA G4 CA M 03900 7 811/8001 16-00 ANL 0387.1 _ 8l272005 .. 10:00AFZ_ 802001 10:40 _ ANL Bllj{pDl 11.15 ANL�47 81212D05 11 ds ANL 8/2/2001 14:30 ANL eldf2001 1500 ANL _ ...... 8f21m1 15:30 _ ANL _ 47.3194750 1_ 122.3657442 Trimble <12% _ 5-10 0 _ 122.3&68622 Tdmble <72% ip2Q 7213714033Tdmble <72% CA 122.3572520 Trimble 4-12% NA 122. Z T¢mble t2-2036 5.3 ,^ no C n C3I 0 20 540 CA Plane Bed mud/sarid_gravel,iargerock gravel novisbleflow CA no CA rnayhe 10 15 t?387-2 0 3 0380-6 � t11�0 CA CA CA CA nudlsand CA CA mudsand_pravd CA vi:�eflow +463G�Bilov+ CA CA ' CA��03l �5�� LJh P ed CA CA led, no visible flow CA CA € CA I CA 0 I 5 AIr4 �5.10 CA CA Qk ��CA no Vil le flow CA Cil � .10 5 A-2 47.535027'0 t22.3594ie7 522.34353T5 ... 7drrive... 12.21M Tdmble 12-?A7(r Tdmble i 12- M'i NA NA NA I CA Pip®d CR CA no Slaw CA I CPi CA CA CA CA CA no CA CA A n9 8-1 B-2 7 76:00 _ AhIL 812f2901 16:25 AhL_I 812i2007 17:00 81712D07 .815 ASH _ RM2001.:.. 91.i0 ASH SA7120Q1 e:45 A8M 47.3363842 47.3399600 122.34242Q0 203Q Z6 5•T0 . Ilene 9ed _ CA -..CA CA mud/sand, a lxk CA CA vSalble�flow no vLgaft flew 7 CA no CA 7 l 0 3 f50 47M14117M122,30MIOS Tumble ' -4% CA C-1 OQSSA-7 0t)T9A•$ 06IJa-5 D-5 E] 0016*4 CA RiSlpfPodl CA CA CA CA nwdlsend _yrawel r no*Ne no v±sade flow n0 vi lble flow - I CA 5D 20 20 47.2725000 Flandheldm c4% CA 20-M Ad, ChwwW CA 47.2745UB _ Handteld iM �fi 2$ 47.278E-5e Handhed 1 t4% CA S-10 ti1712001 10:25 A9H 47.2758529_ Handre4d �4% CA CA CA CA CA ____no Wi9161e flow 0 8l7i2007 8r772001 10:55 t2:15 1 ASH ASH 1 473878838 _1222985298 �J2P,_90f3846 Hend]ald 44 W% CA CA 2-5 CA GA CA CA I ingEe d- G,4 al pondednqvls7ble Row Pondw.Tl isibleflow CA CA CA I CA ^ma e. 0 15 i3 so ,Ri%I_elPool CA mudisend no visibe flow maybe 0bo 517 1 S3 05 Ap1 472M3504 R7.300587 122.3UMM 122.3110406 HandIll Handtetd _! -41% <4R6 NA 5.10 P! CA RitOgq!op CA CA mud/sand rave! no vl5♦bie Dow n0 flow 0 0 5 � 5-T CA 6-10 Art Chwil -CA 1~2 8d7l2001 73:35 AHH QD7.6A-2 BJ7�0p1 14M ASH 4730D5173 27�309,T8 Hendhdtd : 0% CAA Art. Ch�ilyd mudlaend mudlaand ,visible rto vsiblls Dow 5 9 G Bn72DQ1 t4:30 H A7.30262a2 i2229787T8 HarldrMd :: <d% Q 23 A4R CCharrlsl CA gravel Tlaw no vlst5le flow CA G. S5 F•1 8I7�001 t4:50 47.3p®0Qt2 7 .3t783145 Harratd <44ti 5.70 26 tfPod CA OOSSA�.f 817/2007 1515 A7.3t73715d 122.3032085 Handheld �% - - 10-20 CA CA mud_- _ nO 0 MudIlil no,vi5ibleMw - H•. 6116f200T 1fi15 ASH - A7.3708024 �„22wP899423 Handheltl <1291 CA rrf0 CA A_ n. Channel CA I. .0 20 raral no visible flow no visible Dow visible Pow visible :low visible tow visible flow w5,ble ,".-v _ vlsibleD_ow _vis�ble rta vi_si p014►M. BI1012007 6• ASH A7-MO 06 47.xM775 t22:S2Q4W6 122.3198773 _ Handhe_Id--W% _ Handheld _ 4% 25 �10 CA R,.:IUPcoI_ ravel I 7 S ra�v4t NA 2-6 CA i•f 817faIR06t 9' vas CA no 75 50 havol 2-5 fiff5ef . Ri!flwpoel 0045�4 sl1QAxQQ7 1lY.00 A7.2672833 l22.3299393 Ha�dPreld.._ s4% 2.5 muftand _�hx no 10 2-6 CA CA. m 0004 8I100001 i020 ASH 472724292 M3243765 Handheld_ _ _<4 % &110 � �] CA 5 1 mudlaand f 0@f3.2 10=1 t0:4 ASH 47.p801111 122- � 4 ftiolhelld .. <4% M � CA Ca. mudlsmW CA CA 2 2 ravel 1 i12% CA 8-10 CA _ I- Step.IP0ol CA OLlt 7 8170l2001 l7:00 A9H '- CA 2 20 ._ grown 0014.1 BH 00! ! S:5D _._. ASH 472825411 12L3279546 - Wfiq ld 412% CA 23 CA Ri`.fle;Peel CA 1 E7$ -___yes �e6 C%t - I S- 20 S riWdletmd �CA J-7 0014.2 Bf10u;tt70i iWMt 12:T5 12A5 ABH A13M� 47,288023 A7.2723166 1223364723 122329773f Haildhetd Handheld cd96 1 0% � 5:10 2-6 5-1 CA Rit qn* CA CA CA I ravel I no 0 IX!!3&S t3rIG�DOt 33:20 ABH 47.2718713 722:.345+1211 Htindlydd <72% 2�5 CR CA .CA 1 CA .0 .0 0 i K.1 81f01P001 13A ABM 47289.SM 122.3591548 Handheld I c4% CA 'CA All Channel Art. innel CA CA it Row K 3 er10Ct001 14:30. AS7f 47,2OW1 fHindheld 44% f'A CA CA 0A CA CA EMfte 1 0 0 L-2 8/10/2001 14:45 ABH 47-2993908 122 90421 Handheld <4% CA 25 CA CA ++I. I CA mud/sand no visible Now no4- 0 20 L-3 e3e9.1 030&7 03D&3 038&2 N-S 8/10/2001 QII26Q7 BIiMMI BMI02001 811112001 &11112D01 14:55 fird0 &20 .1135 9S5 t0:30 ABH ASH ASH ABH 47-297996 47.29H7387 472013M 47,31 74 47.3709522 122.3448311 722.37dii811 122.388433 122_3it9878 122 _385Q26B Handheld Handheld eld hldldhdd <4% s12% c4% c4% ` % r4% J CA CA CA CA CA -5 2ti5 CA CA' (A Art, Channel CA CA CA . CA CA Riffle/Pool RINkiPotll CA CA CA mud/sand CA CA CA CA mud/sandj3onded. CA CA CA CA no visible flow novSslbleRow rto_vislWe visllNe Row CA CA CA CA CA CA CA CA mavbe CA m CA 30 0 0 30 15 0 0 5 0 0 0-1 8/11/2001 11:20 ABH 47.30975415 1 1f Handheld <4% CA CA CA CA CA CA CA CA CA CA CA 0 D 0f}14&i O-2 all112001 Elf"I Q1 17:45 12:25 ABH ABH 47:302b508 47.305238 1223364516 122.34614 Handheld Handheld <4% <4% CA 2-5 2-5 2-5 Art. Channel CA Ravine CA CA mud/sand mud/sand. ravel an�dEanl�el onded. no visible flow no visible Bow GA no maybe 0 20 L•1 BlIV20DI 12:45 ABH 47.3029903 122.3526846 Handheld <4% 2-5 2-5 Art Channel ArL Channel mud/sand gravel no visible flow 15 50 Q� Q3, 4-3: P2 8112/200! 81T2120Qt BI12A2001 M 9:30 ABH ASH 47.3421184 47-34842t 47.33073f2 122. 778 423.3242150 1 156 Hmrdhdd H9n"d Hanc>neld ct2% 4-12% 1 25 NA 25 Z: 2� CA RuwPad Ri5lelFracl MWPod CA rave[ ravel ravel rav0t CAlloty flow flow CA no 30 i0 0 25 15 2 P-T Q R w12A200S 8112A2007 8M2=1 12:45 1AG 1-0 ABH ABH .. 47. 47. 47. 30772 1�' > f=-Mgy 3 1222395/22 H[ardheld lid 12.20'/,f I S 4-29G CA CA 4 CA CA CA C'A CA ArtMarwl CA CA mudtsaM CA mudsmW CA CA GA flow CA' �nordsiblallew fkM CA CA CA CA CA CA CA f.A n0 no CA no 2 7 30 0 e 0 'CA CA CA CA no PA CA r70 75 30 0384.2 8/l2�001 7d30 [ Aliht 47,3424188 12•P-3i85718 NBnldrdd 4-1 e2 Q Art. /YtChearnd novls 0 15 75 2 30 "� 75 Q3t74.1 D3&r1 2 S 8/72/20071 8112f206T 8/12/2001 8/13/2001 2:1Q 2 2,45 7:50 Rf3H ABH ABH 47 47. 15 47.33Q5527 47.3485554 22. 122.3'24i80uS T22.3245106 122.30921 f3 l4aradtBld Handheld Flen W 4!% 40% a4 CR 2-5 2-5 CA NA 2-6 6-SO CA AIL CltssadaRavk4e ArL Ch�rtrN CA CA RAwine CA rave[ gravd souk CA CA' 9 _rave[ gravel, large rack flaw 7m Dow no flew na flow T-2 8/13/2001 8:25 1 ABH 47-M71 221992399 Hptid]eid W9k CA 10�0 AMCharulei Art Chanel I Ravi n6 Ravine CA CA 96 •tar „erode mud+sand CA CA no visible flow no flaw nov138Neflow no M no CA 0 2 l 0 0 2 2 0 2 7-3 0-11 V-T 8/13/2001 8/13/2001 8/13/2001 9:10 9:15 9:40 ; ABH 1 ABH ABH 47. 1 47243M72 47.3449075 1222949638 122.290882B 122:27if8822 H&MIMM A% 1 4-12%: s4 CA CA CA CA CA Art. Ravine a v le flow CA CA no CA I SO 20 V 2 VV 2 8/13/2001 8/13/2001 10:00 10:25 ABH ABH 47. 1372 47.3fi475i39 12226283 122267497$ Fldndhetd hieandh4Pd a--2p76 2-5 CA 20-M CA FNfflelPnr,�Sd moo CA CA CA CA ! Q 75 Q 5 % B/13/2001 17' H 47 12889 122278M I Handheld 1 <4% 5-10 1 CA I An. Channel I CA I poorled nQ visible flow. I ma a Notes: CA- Cannot Assess NA- Not Applicable LB- Left Bank RB- Right Bank ' Natural obstructions identified by City personnel were not observed during the stream inventory. Under the Federal Way classification system, the stream portion upstream of a "natural permanent blockage" may be classified as "minor". Because the King County, old DNR and new DNR systems consider both resident and anadromous salmonid populations, such obstructions do not necessarily affect classification. 2 According to City personnel, tributaries to Panther Lake are considered artificial stormwater conveyance (flows formerly infiltrated with no historic surface water connection to stream system). Per the request of the City, these streams are also assumed to not be fish -bearing. Thus, these tributaries are not considered "streams" under the Federal Way or King County systems. For DNR classification systems, 'Natural Waters"'only excludes water conveyance systems which are artificially constructed and actively maintained for irrigation". Append B (URS Gap Study}xls, Appendix B Pagel of 2 1/27/2012, 4:12 PM Appendix B Federal Way Stream Classification Data Summary Notes: CA- Cannot Assess NA- Not Applicable LB- Left Bank RB- Right Bank ' Natural obstructions identified by City personnel were not observed during the stream inventory. Under the Federal Way classification system, the stream portion upstream of a "natural permanent blockage" may be classified as "minor'. Because the King County, old DNR and new DNR systems consider both resident and anadromous salmonid populations, such obstructions do not necessarily affect classification. ] According to City personnel, Obutane5 to Panther Lake are considered artificial stornwater conveyance iflows formedy infiltrated with no historic surface water connection to stream system). Per the request of the City, these streams are also assumed to not be fish -bearing. Thus, these tributaries are not considered "streams" under the Federal Way or King County systems. For DNR classification systems, 'Natural Waters"only excludes water conveyance systems which are artificially constructed and actively mafnlained for Irrigation". Append B (URS Gap Study).xls, Appendix B Page 2 of 2 1/27/2012, 4:12 PM Table 1- Stream Classifications City of Federal Way Tributary # Stream Name Source Outfall Federal Way Class _ King County Old DNR New DNR _ Stream Attributes Stream Condition Completed/Planned Projects Line Stream Class (Longit. slope, fish barriers, (Natural condition, rock ReVl2W Class Class TYPE TYPE TYPE TYPE Type Type Type intermittent/ perennial flow, armor, trashy, channelized, MajorFMinTrNA Comments 2 3 CA NA 2 3 4 5 CA F F-R N CA fish species, etc.) etc.) No. /Location ID X 1 0391A-1 Unnamed Pierce County 0391-A2 X (Dash Point Creek Upper 0391 A-2 Branch) Unnamed Puget Sound 0390A1 X X X X (Dash Point Creek Mainstem) Unnamed 12" & 18" stormwater cmp's Flows into RD Pond No. Intermittent flow; permanent Moderate to severely eroded July 2005- SWM channel to imported 3 0390B-1 X-Rev. X Reclassed 6/05 due X X X (Dumas Bay Creek) north of SW 316th Place at R90432; then into Class 3 6/05 to excessive I natural fish passage barrier earth channel w/debris jams. stabilization place fill, fabric, and rock 4602 street address. wetland No.11-21-03-7. The longitudinal slope. located below crossing of 039OB-2 with SW Dash Point geotextile armor; w/native bank stream becomes 0390B-2 Rd. plantings. where it crosses SW Dash Point Rd. 4 0390B-2 Unnamed 0390B-1 Dumas Bay Vic. Class 1 X-Rev. Minor on parcel Moderately eroded earth channel w/debris jams. X X X X (Dumas Bay Creek) estaurine wetland pond 2/10 112103-9012 & No.11-21-3-8 upstream. 5 0390C-1 Unnamed Unnamed Class 3 wetland pond No.11- X X X X (Dumas Bay Pond (Dumas Bay Pond Creek?) 21-03-7. Creek?) Unnamed Class 3 wetland pond No. 11- X X 6 0390D-1 X X (Dumas Bay North 21-03-7. Branch Creek?) Lakota Creek Upper X 7 0387-1 Starts west of SW 320th Flows into 0387-2 at SR509 X* Reclassed 2004? due X X West Branch Street. Source is SW320th hairpin turn cross culvert. to intermittent flow Street lateral and SPL 4, 5 & and excessive slope. 8 trunk that flows thru lake 0387-2 Lakota Creek Lower Ponce de Leon. 0387-1 0386-3 8 X. X X X West Branch 0387-2/0386-1 9 0386-3 ILakota Creek Upper 0386-4 X X X X 0386-4 Mainstem 0387-3 North side of Dumas Bay, X X X X 10 Lakota Creek Lower Mainstem into Puget Sound. 11 0386-1 Lakota Creek East 22nd Avenue SW stormwater 0386-3 X* X X X Branch trunk and groundwater from wooded ravine. 12 A-1 Unnamed 21st Avenue SW/SW 304th A-2 X X X X (? Creek Upper Street stormwater laterals Mainstem) X X X X 13 A-2 Unnamed A-1 Into Puget Sound, between (? Creek Lower Dumas Bay and Poverty Bay. Mainstem) X X X X 14 B-1 Unnamed 7tht Avenue SW/SW 297th B-2 (? Creek Upper Street stormwater laterals Mainstem) 15 B-2 Unnamed B-1 Into Puget Sound, south of X X X X (? Creek Lower Poverty Bay. Mainstem) K:\SWM\Stream Inventory\Stream Inventory.xls(Table 1) Page 1 of 6 1127/2012, 4:16 PM W Figure 1 Federal Way Stream Classification Scheme NO Natural t]rnm5tream Permanent Blockage Observed SalmnrtWs Low Gradient City Definition (Sea Observed (<pp%) Clty Defmitlon (See Attad w-nt) AdKhn * pp Contains ar *:DResident or Stream AND Not s aj fired or 4rato Fish Major Minor Federal Way Stream Classification Notes: Flow Observed Data Input forDecislonmeking Perennial Decisionmaking Step (Highlights indicate actual classification process) 1 iA 5 A�S3AY �5i� � rya• � -r... �� c p 2t5 IL ck Am r ti V- f 'r 51, ��i M