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Home My WebLink AboutB940152 LEVEL I DRAINAGE ANALYSIS FOR .. ST. !ANTHONY PARISH LOCATED AT 406 SOUTH 4TH STREET' _ _ _ __ __ RENTON, WASHINGTON OUR JOB NO. 5091 PREPARED BY: BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72nd Avenue South Kent, Washington 98032 T. Co (206) 251-6222 f W �- O P � 2PS02 lv� MAY 3, 1994 ASS/aVAL d 5/5199 EXPIRES 4/10/ q5 SCI &OWL LEVEL I DRAINAGE ANALYSIS FOR ST. ANTHONY'S PARISH, RENTON, WASHINGTON OUR JOB NO. 5091 1. INTRODUCTION/GENERAL INFORMATION The project lies within a portion of the Southeast quarter of Section 18, Township 23 North, Range 5 East, Willamette Meridian, King County, Washington. The project lies within the corporate limits of the City of Renton. The existing site consists of an asphalt-paved parking area, sidewalks, and some landscaped areas. The site is bounded by Whitworth Avenue on the east, South 4th Avenue on the south, and an existing alley on the west. The project is bounded by additional property owned by St. Anthony's Parish on the north. The site is 0.33 acres in size. The overall topography of the site generally slopes from the building at 1 to 2 percent toward the street and/or alley. The on-site soils as mapped in the United States Department of Agriculture Soils Survey for King County is mapped as urban land soil. The soil is characteristic of disturbed natural soil layers with additional fill of varied thickness. The proposed project is for the remodeling of the existing parish ministry center and addition of an elevator. II. UPSTREAM DRAINAGE CONSIDERATIONS From the site inspection of the project, it is apparent that the site does not receive any storm drainage runoff from upstream properties. Surrounding properties from the site are located at approximately equal elevation. The drainage from adjacent properties slopes away from the lots toward the existing roadway. All drainage from adjacent properties drains into an existing public right-of-way and stormwater collection systems within the streets. III. ON-SITE DRAINAGE CONSIDERATIONS As mentioned in the introduction section of this report, the site drains from the existing building to the south and east across existing landscape. This runoff then enters the public right-of-way where it drains across the existing sidewalks into the stormwater collection system in the street. Surface runoff from the northerly parking lot drains westerly to the existing alley. Once the drainage enters this alley, a catch basin, located at the south end of the alley, collects the drainage. From this point, the storm drainage is tightlined into the public stormline located within South 4th Street. Please refer to the enclosed map which defines the drainage conditions on the site. IV. DOWNSTREAM DRAINAGE CONSIDERATIONS Storm drainage runoff from the existing site sheet flows over the existing sidewalks into the stormwater collection system in South 4th Street. Portions of the drainage from the site sheet flows easterly also across the sidewalk and into the right-of-way drainage system in Whitworth Avenue South. The stormwater drainage, once entering the previously-referenced public streets, enters a stormwater collection system located at the intersection of South 4th Street and Whitworth Avenue South. The stormwater is collected through an underground conveyance system and tightlined through a 12-inch storm main running east and west on South 4th Street. Stormwater in this main line flows westerly to Shattuck Avenue South. Once entering the storm -1- M.364 [DTC/sdc] drain manholes at the intersection of Shattuck Avenue South and South 4th Street, the stormwater flows southerly through a 12-inch diameter pipe along Shattuck Avenue South to the intersection of South 4th Place. At this intersection, the stormwater enters a storm drainage manhole which also operates as an overflow structure. The southerly outlet is designed to act as an overflow storm pipe only. The primary stormwater flow proceeds along the 18-inch diameter storm main located in South 4th Place to the intersection with Rainier Avenue South. The stormwater then flows to the westerly side of Rainier Avenue South and turns to head southerly to an 18-inch diameter storm main. From here, the stormwater continues to run south of the storm drainage tightline.collection system in Rainier Avenue South where it increases to a 24-inch diameter before entering the stormwater lift station located at the Burlington Northern Railroad track crossing. Once stormwater enters the existing stormwater lift station, it is pumped up and through a 48-inch diameter corrugated metal pipe westerly, paralleling the south edge of the Burlington Northern Railroad right-of-way. This 48-inch CMP stormwater pipe is routed westerly where two additional storm drain lines connect at the crossing of Hardie Avenue S.W. From the connection point in Hardie Avenue S.W., the 48-inch CMP stormwater pipeline proceeds westerly where it will eventually connect to a stormline in South 7th Street. From this point, the stormwater runs westerly where it eventually outfalls into the Black River system. This description of the downstream analysis is in excess of the quarter-mile minimum required. V. EXISTING DOWNSTREAM CAPACITY PROBLEMS After research with the City of Renton Stormwater Section, there appear to be no existing capacity problems with the. downstream conveyance system from the previously-mentioned site. VI. DOWNSTREAM FLOODING COMPLAINTS After research with the City of Renton Storm Drainage Section, it appears that no complaints have been filed on the downstream drainage system from the proposed site. VII. The following information has been obtained from the available resources through King County: 1. Sensitive area of folio, page no. 6. a. The project is located in the Green River Drainage Basin. b. No wetlands or open water exist on site. The closest wetland shown on the sensitive area of folio is approximately 1.5 miles to the east. C. No stream or 100-year flood plain is shown on the site. d. No erosion is mapped on site. e. No landslide area is mapped within the site. f. No seismic hazard area has been mapped on site. g. No coal mine hazard area is mapped for the project. -2- M.364 [DTC/sdcl 2. Adopted basin plan and finalized drainage study. This site is located in the Green River Drainage Basin. 3. Flood plain/FEMA map. No flood plain has been show on site on the FEMA map. 4. Critical drainage maps. The project site does not lie within a critical drainage basin. 5. Request for complaints have been filed with the City of Renton. No complaint information was on record for this area. 6. Basin reconnaissance summary report. See enclosed information. 7. Soil Survey for King County area, Washington. See enclosed. -3- M.364 [DTC/sdc] Lff man to MI MOR Now a ��+:'�� ,'. •1 ��" f �� .. �� Ili Q ■ ieeR �k v� '"bill �G. Z �e ia omHill ull M �11011 - WINAM �4itArn�•^. a .► Ems+ .tom \` ■ '� acasM ► rt •: 4 -� W�� • Ye+a ..rim lt�ti Mon t SaE�MA( ti FAIN@ SIM it WHO INS .6c �k � t •R' S� .� � 3t1� OUYY 4 :- allii the illIN ON !! ll � Ion 4arn" rA .1 M t ' Win t IVI �• � � � � � r O� lawold - 0 Emig Sir f IN IL Pam . , it A All 31 OR Sri lit WA INI z �" Rom' N�i ■ Ems} � �� t i � v' d. A►yW1W�i:�7►�L1�6f R74 /� Na � �� _ Out Will /1(ii oil Am NEW WT ��_�► '� a �; cif � �^�:�' � �.�.�i � __�►�`.v"° �eo.�-.. ail �°' r��i1'�1�.� �.,�" .. all tons,) j n ` �►ays�i�a �lt� FBI Now �� f asrE1 ZO s M7SO ill nil NINE IN� 4 F MA FOR MIF 1fill �P ti .f 1 FS R' IN Q MR ��■ter�j77�'+��l1-��` �� {� �01 �I r ME Kai 10411 all o �• .� ,;�; lid ME ski HUM X I Vol AW R IL WX VIP AUS -Aft '} 11 Y yx.� a A r a NATIONAL FLOOD INSURANCE PROGRAM i FIRM FLOOD INSURANCE RATE MAP KING COUNTY, WASHINGTON AND INCORPORATED AREAS PANEL 327 OF 650 I ,y PANEL LOCATION CONTAINS: COMMUNITY NUMBER PANEL SUFFIX III RENTON,CITY OF 530088 0327 0 'II UNINCORPORATED AREAS 530071 0327 0 I I MAP NUMBER 53033CO327 D F MAN EFFECTIVE DATE: SEPTEMBER 29, 1989 it }� I i i Federal Emergency Management Agency w z Lu j > w ZONE X z w Q N RTH 4TH STREET H D z w z Q J t ti6 , j Q ORTH 3RD REET ZONE X °° Lo ZONE X � � a w J I J a AIRPO WAY WILLIAMS AVENUE RM 278 N R ND STREET ZONE ti� AE OUTH BIN STREET S TOBI rL9 �pP L 2 STREET 0 P 2. w Q ZONE X P° RM 279 0 p 30 18 m �' 0 P � 3 z Z BRONSON z WAY Q SOUTH 5 C7 R D %j S UTH 2ND REET w 5 ui w w ZONE W Py 5 Q Z) z Lu > Q N°J 33 J > 34 SOUTH � 3RD PPG��IG SITE & w' 405 X z 0 S1 PP�� a a EE wLL D z tN �, > w S J � Q J z Q > z u J Lu 0 Lj .. � GN�GPG Qy N U � z J z J W cc � � x �►'I 11 �i ice/ /'' � ` \ ` � � m / / ` r \\ I /� \\ \ 1 \ i II j rn 5 II I 37 n O r \ i 0) x D -„ I � 1 a m m J I o x / No. \ -----� _ `-- ------ i 1 11D1 I I -- j x CO ��jm p � t IL Oil n I I 6 IIC•1 0 ❑ o MILwauKEE I sueTaR 115 Kv. ---- '=_ SHATTUCK ------ ---1�r------- ----! x�_ 00 0 o a Q o a D I p q 4 ❑ 1 1 4 __ off` _ _._�� _-� ��--yyi'� 1 I I I °U ❑ ❑ ❑ 0 [)* 0D1 1 ❑ oQE) a aa� _ _-_--�'------''------1 � � --_------- \ r----------------- �e ,ems..-'-ST+-r�T t Lru Ix -WITHWOR K -------- \\ ----------------- -1 r----------- El (�`�`� (� a D Dp Qo Q -- - ----- - - -� � _ \ , 1�-- ---�cn �o I I o Cl I -� ° ° M II I � I C I 1 1 � 1 1 0 D 11006 ,; ; Oil , ' 00DOOOD D , 1 QD 00 Dn❑ D ► 1 a . ___ __ `---r�x _-r--- - ---- ST MORRII-------------1� ----- -i �N I 0111, It Q 0 01 offiqU0000130 0, I iI 1 I i I I]O000D 1 1 p I . - ------1 -------�- Q� �,. �_—aQ -- D- ❑OQ__J `l��___ - r- � e� so ars ►�la `---------------------J -- - \ Ix`-----_ T _--- - l - -- x SIIAITH£RS ----- -------- 9 \\ r._---- -��- 1 ---- ------ - , , o ICA t� D❑D 1 , 1 t 0 ` r 0000 ,00 6 ,100DO \- [In ON ----------------- i000 Qpa a 0 I1 17 ; ;, l 1 I � [l I 1 _, 116,E6-1 ^� -- 1i16,E6-8i- 6-7t 6 16,E6-_LO ij 1I 6,F5S-1 6 '1 16,�G5 I� -7 6,E6 6- 6,G6-7 16,E6-2 16,E6-2 16.F6-9 16F6-10 - � L (f ]3 6,G6- 16 6-22 16,EG-2 6 _ ----- � 16,G6-6 1 6 16,E6-11 1'16,F6-� 16,F6-7 I � 16,G6-5 -23 16,F6-14 16,E6-4 I 6sG6- i 16,E6-16 � - 16,E6-15 3RD L 16,F6- 16,E6-l3 6,E6 2 6-3 16 SITE f ,F -2 1 -- 16,F6-11 %X6-17 16,F6-4 16,F6-6 16,H6- CITY OF RENTON ;_, 16,F7--6 2u 16,F7-1 GD :6.G6-2 2�1 �, EXISTING STORM SYSTEM \ 16,G6-1 16,H7-19 6,H7 D YS�'EN! -18 MAP Q --_ 1 H7-11 16 7-2 SCALE: 1"=2 00 _ 1 H7- r16,F -19 ` -- ----- O� I F7- _0 `w P1r 16.F7-5A -- sp NG i \ 16,F7-10 16,G7-7 - 16,F7- I G7 if 7- r --- __ _ 16, -13 �� •, ~� 1�G7-2 16 G7-8 6 H7- 16 H - 7 16,177-1 16,G7-1 ~ 16, -14 6f 7-12 _ �LLl 16,G7-9 $ S� lEiG7-3 16,H7-2 U-7-15 16,F7-16 ,F7-17 -- -- ---- --- LIFT STATION ----- - 16,GB-6 - - -- 16,FB-10 -- 4S"5D -- -- r- ---- 16,F8-18 16, I G8-♦ 16,G8-3 __ 16,G8-2 16,H8-5 S, 0 .1 �L S U R V E.-Y i KingCounty Area W ash in ton g . F SIL., , NGRcJ,INC. ►,,,RGh„�a:., ..:!IJVL- L`r��,7 %64% UNITED STATES DEPARTMENT OF AGRICI -TURE Soil Conservation Service in cooperation with WASHINGTON AGRICULTURAL EXPERIMB T STATION Issued November 1973 If drained, this soil is used for row crops. It Ap2--3 to 8 inches, gray (SY 5/1) silty clay loam, is also used for pasture. Capability unit IIw-3; light brownish gray (2.5Y 6/2) dry; many, no woodland classification. fine, prominent, dark reddish-brown (5YR 3/3 and 3/4) mottles and common, fine, prominent mottles of strong brown (7.5YR S/6) and red- Urban Land dish yellow (7.5YR 6/6) dry; moderate, fine and very fine, angular blocky structure; hard, Urban land (Ur) is soil that has been modified by friable, sticky, plastic; common fine roots; disturbance of the natural layers with additions of medium acid; abrupt, wavy boundary. 4 to 6 fill material several feet thick to accommodate large inches thick. industrial and housing installations. In the Green B21g--8 to. 38 inches, gray (SY 5/1) silty-clay loam, River Valley the fill ranges from about 3 to more gray (5Y 6/1) dry; common, fine, prominent, than 12 feet in thickness, and from gravelly sandy brown (7.5YR 4/4) mottles and medium, promi- loam to gravelly loam in texture. nent mottles of brownish yellow (10YR 6/6) dry; The erosion hazard is slight to moderate. No 25 percent of matrix is lenses of very dark capability or woodland classification. brown (10YR-2/2) and dark yellowish-brown (10YR 3/4) peaty muck, brown (7.SYR 4/2) dry; massive; hard, firm, sticky, plastic; few fine Woodinville Series roots; medium acid; clear, smooth boundary. 30 to 40 inches thick. The Woodinville series is made up of nearly level B22g--38 to 60 inches, greenish-gray (SBG 5/1) silt and gently undulating, poorly drained soils that loam, gray (SY 6/1) dry; few, fine, prominent formed under grass and sedges, in alluvium, on. stream mottles of brownish yellow (10YR 6/6) dry; bottoms. Slopes are 0 to 2 percent. The annual massive; hard, very friable, slightly sticky, precipitation ranges from 35 to 55 inches, and the slightly plastic; strongly acid. mean annual air temperature is about 50' F. The frost-free season is about 190 days. Elevation The A horizon ranges from dark grayish brown to ranges from about sea level to about 85 feet. gray and from silt loam to silty clay loam. The B In a representative profile, gray silt loam, horizon ranges from gray and grayish brown to olive silty clay loam, and layers of peaty muck extend to gray and greenish gray and from silty clay loam to a depth of about 38 inches. This is underlain by silt loam. In places there are thin lenses of very greenish-gray silt loam that extends to a depth of fine sandy loam and loamy fine sand. Peaty lenses 60 inches and more. are common in the B horizon. These lenses are thin, Woodinville soils are used for row crops, pasture, and their combined thickness, between depths of 10 and urban development. and 40 inches, does not exceed 10 inches. Soils included with this soil in mapping make up Woodinville silt loam (Wo) .--This soil is in elon- no more than 25 percent of the total acreage. Some gated and blocky shaped areas that range from 5 to areas are up to 15 percent Puget soils; some are up nearly 300 acres in size. It is nearly level and to 10 percent Snohomish soils; and some areas are up gently undulating. Slopes are less than 2 percent. to 10 percent Oridia, Briscot, Puyallup, Newberg, Representative profile of Woodinville silt loam, and Nooksack soils. in pasture, 1,700 feet south and 400 feet west of Permeability is moderately slow. There is a sea- the north quarter corner of sec. 6, T. 25 N., R. 7 sonal high water table at or near the surface. In E : drained areas, the effective rooting depth is 60 inches or more. In undrained areas, rooting depth Apl--O to 3 inches, gray (5Y 5/1) silt. loam, grayish is restricted. The available water capacity is brown (IOYR 5/2) dry; common, fine, prominent, high. Runoff is slow, and the hazard of erosion is dark reddish-brown (5YR 3/4) and reddish-brown slight. Stream overflow is a severe hazard unless (5YR 5/4) mottles; moderate, medium, crumb flood protection is provided (pl. III, top) . structure; hard, friable, sticky, plastic; This soil is used for row crops, pasture, and many fine roots; medium acid; clear, smooth urban development. Capability unit IIw-2; woodland boundary. 2 to 4 inches thick. group 3w2. 33 a Is �. �' �• i� ', � .,bet �`'..r' t\QQ �I � .� -' An C •. :• a `. ..• 9po� s': _ ' =' - y ,r:- 3 : Athletic IfriIlk 1+►' 1 � _. iS eenw MAX B w 7 : q.• tit_ Y, i 77 I. ''> z ' rrIN aseb�i}/.> "�°,e � # �.� 1A'GRAVEL i•PIT TpOrk � ':N • � � . BM .� - •�. eta Rh r< -- w • :rah€�4 ,-, •�' I ', ' � si r <µ'�• c� y , A Wit. '�"r`. nX'•/ ", '"' 4 3. -. � (p d., 1.. . � z t 13 I `., •I I I •s - x Ake a5::, se I i t7 Q _ 5 Al atrF ;.p,_ Fes; o _ 1 _o_ i•.` -• < Ur w ge pR 'c sp al il/ •• ` '�_ Mlkt)stai Amc `� �, ••�h`._ AkF � ur r l2G ! oa% D 2U qg ?ik aQ I�fiz�ii ( P. gC .fie LA, I 515 Rol � ,BeC PY I 4 ai•` l M` V1sr IWo '"e Ur,';'M 1 U r AgD � ' Track 1� $ � � - Ur__ Py ■ ..; ,� t. , Wo r s. ir 7� I v;� .� ..Rry S c AmG } LY IBM 169 � G wN .`` ► ♦ t _pyUr 1. ` � ' �., a 8" ■ d'.i; ^�"•t �r.��I ;7 � e� .� � ,(�,.+'3 vVit �p �• M yr. M ,6 `/T6K�e'. ESfI C 1 •, . 7 a, ,� ' So "`•• fib, MI 17Z zo A 194 s # � s Wo . �M� ii S Ag6.S el, , Sk Q� Fit .1 k � iF 1 • � u Am8 74 N I � :n. ;•*„ +� `ERR. ;v Bt.) . �,•. x �-.�i+ a '�.: sa.s� ,��,`" g I 1 fcG; 1Na�er, s •of P,r Re �Os I P, p Tank'. �twY/=.at`�' r< ..•