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HomeMy WebLinkAboutSWP271852 I N T E N S U S ENGINEERING • SURVEYING 17508 PALOMINO DRIVE • BOTHELL, WA 98012 (206) 481-7282 HYDROLOGIC ANALYSIS PLAT OF UNION PLACE CITY OF RENTON, WASH INTENSUS PROJECT NO 09.2305.01 � L. BOIL J 'NASHI F,A JULY 5, 1989 ��„° 'A o o N o �G IS'T a/fngineel �l PLANNNG DfWISiON CRY OF RENMON JUL 0 ? F `1L ' intensive • thorough • detailed • complete PLAT OF UNION PLACE CITY OF RENTON, WA INTENSUS FILE NO. 09.2305.01 Soils Conservation Service Curve Number Method Extensive Information has been accumulated by SCS as a result of studies Involving runoff characteristics of different land types. The relationship of this data has been used to develop the CN method to determine runoff. Detailed use of this method is contained in the National Engineering Handbook by SCS. The method Involves four steps: (1) Determination of a curve number, (2) Estimate the total volume of runoff, (3) Develop a unit hydrograph, and (4) Develop the runoff hydrograph. Curve numbers are determined from the combination of soil type and land use. Soil types are classified Into one of four categories- that depict runoff potential . Soil group classifications are listed In Table 2. 1D-1 as to hydrologic group. Referring to Table 2.ID-2, recommended curve numbers, and reading across from the land use description, the curve number is obtained. Curve numbers must be determined for each separate land use so that -an area weighed CN can be calculated. Estimating the runoff volume depends on the precipitation received and the natural retention capacity of the area. The relationship developed by SCS: Or = (P - 0.2 S)2/(P + 0.8 S); P > 0.2 S Where Or = total runoff In inches, P = total precipitation in inches, and S = Potential maximum natural detention over the entire area in Inches. Related to CN, S = (1000/CN) - 10 The solution of these two equations provides the total depth of precipitation over the area that becomes runoff. Total runoff volume, Or( Inches) x A(sq. ft. ) x 0.0833(ft/inch) = V(cu. ft) A unit hydrograph must be developed to obtain the distribution of stormwater runoff versus time. In developing a synthetic unit hydrograph the following assumptions prevail : rainfall is uniform; Intensity Is constant and can be approsimated as a series of steps; the hydrograph adequately represents the physical features of the drainage basin; and runoff routing will be linear at the reference point, i .e. , Individual hydrographs will be additive. I' • t SCS Analysis Union Place/09.2305.01/9-20-89 Page 2 Synthetic Hvdrograph Storm Duration (D) : Time Interval of rainfall Lag (L) Time between center of rainfall and when peak runoff occurs Time to Peak (Tp): Time from beginning of runoff until peak flow occurs Recession Time (Tr): Time from peak flow to condition when runoff began Peak Flow (0p): Peak flow rate generated by the design storm Approximate relationships have been developed by SCS for the above variables: L = 0.6 Tc (Tc In minutes) D = 0.2Tc Tp = D/2 x 0.6 Tc = 0.7 Tc Tr = 1.67 Tc Solution of the above variables from Tc is necessary before continuing to develop the hydrograph. For the western Washington area, the Soils Conservation Service (SCS) has developed a storm distribution for the peak 6 hour period of a 24 hour Type 1A storm (see SCS tables) . 4/SCS.09.2305.01 SCS has classified over 4,000 soil types into these four categories. The following table .shows the hydrologic soil. group of the soils which are charecteristic .of S.nohomitir:County.. Soil Hydrologic Soil Hydrologic Soil Hydrologic Group Group* Group Group* Group Group* Alderwood C Indianola A Pilchuck A Bellingham C Kitsap. C Puget B/C Cathcart C Lynden A Puyallup B . Custer C McKenna C/D Shalcar D Everson D Mukilteo D Skykomish B Everett B Norma B'/C Snohomish D Getchel**. B Orcas D. Sultan B Hale B Oso B Sumas B/C * B/C refers .to hydrologic group in 'the drained/undrained condition. ** New soil classification, very similar to Oso soils. Note: Soils, shown on SCS maps as Coastal Beach, Riverwash, Made Land, and .Urban Land are not classified because of their extreme variability. In such areas a qualified engineer should be consulted. HYDROLOGIC SOIL GROUP Western Washington Runoff curve numbers for selected agricultural, suburban, and urban land use. For use in Type IA Storm Distribution Area. HYDROLOGIC SOIL GROUP LAND USE DESCRIPTION A B C D Cultivated land 1: Winter Condition 86 91 94 95 Mountain Open Areas - Low Growing Brush and 74 82 89 92 Grass Lands Meadow or Pasture 65 78 85 89 Wood or Forest Land: Orchard with cover crop 81 88 92 94 Fir Forest - good covert - Undisturbed 60 64 76 81 Young second growth or brush 60 72 81 86 Open spaces, lawns parks, golf courses, cemeteries, etc. good condition: grass cover on 75% or more of the area 68 80 86 90 fair condition: grass cover on 50% to 75% of the area 77 85 90 92 Commercial and Business areas (85% impervious) 92 94 95 96 Industrial Districts (75% impervious) 88 92 94 95 Residential3 Average lot size Average % impervious4 1/8 acre or less 65 86 90 93 95 1/4 acre 38 77 85 90 92 1/3 acre 30 75 84 89 91 1/2 acre 25 73 83 88 91 1 acre 20 71 82 88 90 Paved parking lots, roofs, driveways, etc. 98 98 98 98 Streets and Roads: f paved with curbs and storm sewers 98 98 98 98 gravel 76 85 89 91 dirt 72 82 87 89 -T;; s( r- 2. I D-2 24 HOUR- TYPE l4 DISTRIBUTION DIS„HARGE TABLE ICSM/INCH OF RUN3FF1 • TC 0.10 • , ♦rit.s♦s♦•rrt TIME OF LONCENTRATION = 0.10 HRS SHEET 1 OF 3 ••rrrr w rrarrttt.♦t♦tr•.•rtt♦t♦♦tr♦ts.tt♦♦♦t•rrr♦t.•s.r♦♦•r♦.♦.•ttrr.s♦s•♦r♦♦.r♦trt..••.ssrrrrtr♦•ts.♦•♦♦.••♦..s♦.tt.rr• TR AV.• SUBAREA HYDROGRAPH TIME (HOURS) *TRAY. TIME * *TIME (HRS)• 4.00 5.00 6.00 7.00 8.00 8.25 8.50 6.75 9.00 9.7.5 9.50 9.75 10.00 10.25 10.50 10.75 11.0) 11.25 *IHRSI •trtrtr.srrtar..rrrr♦rrrr.rrrrrtr.trrtt•rtrttrrrrrr•rttrtr♦trrtt.rrrrrt.♦rra•rrrr•••ttrr•rtttrrttr.rtrt•..tr.rtrtrr.r..t O * 0 • 0.0 5.7 15.1 27.4 155.9 91.5 75.0 62.3 55.0 51.0 46.0 45.5 44.0 42.5 41.0 40.0 39.0 37.2 * 0 0.25* 0.0 4.4 13.5 25.7 131.7 119.7 90.5 76.3 66.1 58.1 51.1 48.0 45.9 43.8 41.8 40.9 39.0 38.0 t 0.25 r • 0.50* 0.0 3.2 11.6 23.8 95.7 118.5 107.6 86.7 75.0 64.9 56.8 51.2 47.9 45.5 43.4 42.0 40.5 39.0 * 0.50 0.75* 0.0 2.2 9.8 21.6 68.7 98.7 109.5 100.3 85.8 73.4 63.6 56.1 51.0 47.6 45.1 43.1 42.0 40.2 * 0.75 • r 1.0 * 0.0 1.4 8.2 19.3 50.9 76.8 98.1 103.2 95.1 81.9 71 .6 62.4 55.5 50.7 47.3 44.8 43.) 41.6 * 1.0 1.5 * 0.0 0.4 4.7 13.8 29.4 41.4 60.4 80.1 91.9 93.2 67.5 79.0 70.1 62.4 56.2 51.5 48.0 45.3 • 1.5 2.0 * 0.0 2.3 9.2 20.7 25.6 34.3 48.5 65.3 79.1 86.3 86.7 82.4 75.8 68.6 62.0 56.5 52.0 * 2.0 Z.5 * 0.0 1.0 5.9 15.4 18.7 23.0 30.3 41.2 54.0 66.4 76.0 81.Z 81.0 77.7 72.6 66.4 61.3 • 2.5 3.0 0 0.0 0.4 3.4 10.8 13.4 - 16.4 20.5 26.6 35.1 45.6 57.0 67.4 74.1 77.2 77.0 74.4 73.2 * 3.0 3.5 * 0.0 0.1 1.1 7.2 9.3 11.6 14.5 18.2 23.2 30.1 38.9 49.0 58.6 66.7 72.0 74.5 74.3 0 3.5 4.0 * 0.0 0.8 4.5 6.1 7.9 10.0 12.6 15.9 20.2 25.9 33.2 42.1 S1.3 59.5 66.2 70.6 0 4.0 4.5 • 0.0 0.3 2.6 3.7 5.0 6.7 8.6 1.1.0 13.9 17.5 22.3 28.7 36.4 44.6 52.8 60.1 • 4.5 5.0 * 0.0 0.1 1.4 2.1 3.0 4.2 5.6 7.4 9.4 12.0 15.1 19.4 24.9 31.4 38.8 46.5 * 5.0 5.5 0 0.0 0.7 1.2 1.8 2.6 3.7 5.0 6.6 8.6 10.8 14.0 17.8 22.5 28.4 34.8 * 5.5 6.0 • 0.0 0.4 0.7 1.1 1.6 2.3 3.2 4.4 5.9 7.5 9.8 12.5 15.9 20.3 Z5.3 * 6.0 1.0 • 0.0 0.1 0.2 0.4 0.7 .1.0 1.5 2.2 3.0 4.1 5.4 7.0 9.2 11.7 * 7.0 8.0 • 0.0 0.2 0.3 0.4 0.7 1.0 1.5 Z.1 2.6 3.8 5.0 * 8.0 9.0 • 0.0 0.2 0.3 0.4 0.1 1.0 1.4 1.9 * 9.0 t • 10.0 • 0.0 0.1 0.2 0.3 0.4 0.6 *10.0 11.0 • 0.0 0.1 0.2 *11.0 12.0 * *12.0 14.0 * •14.0 16.0 • *16.0 114.0 s *19.0 * * 20.0 r •20.0 22.0 * •22.0 a • 74.0 t 024.0 76.0 • •Z6.0 r * 7n.0 tza.o 10.0 * :30.0 t OOtOrrdrdPOritrtttttttttrrirt••rrttrr.trrtrOrttrrrttrt♦♦t•.tr•.rttttrr.ttrritrrrtOtrrt.t.rrrrlttrrrrrtr.r.r irtrrrl.rrrr. 24 HOUR- TYPE IA DISTRIBUTION PAGF 1 OF 66 ••!t•!t••ltti .• 24 HOUR- TYPE IA DISTRIBUTION DISCHARGE TABLE (CSM/INCH OF RUNOFF) • TC 0.25 • !tt•ttt!••tl t. TIME OF CONCENTRATIJ4 - 0.25 HRS SHEET 1 OF 3 •«•!•itli•••itr!•!ltit#t•t•ii•t#!•t!•!tt••ltill•ri••liit••r••r•••••t••itt••t•!t••ttitt•i•itli••••!it••tt••••!••••#♦tt••i TRAY.* SUBAREA HYDROGRAPH TIMEIHOURSI •TRAY. TIME • •TIME IHRS)• 4.00 5.00 6.00 7.00 8.00 8.25 B-50 8.75 9.00 9.25 9.50 9.75 10.00 10.25 10.50 10.75 11.03 11.25 •(HRS) •••irrilii•r•rIli•ti•Mitti!•tlii•#itililttt!•Pi•it•Mitt•tii•••iiirt••it•t•♦iiitt•iii•ttitii•t•tt•i•ii•ittt!•tlitt#ltttt• ! t 0 • 0.0 4.9 14.1 26.3 144.2 101.5 83.8 68.1 63.6 52.9 49..4 46.2 44.4 43.0 41.3 40.0 39.0 37.E • 0 0.15+ 0.0 3.6 12.3 24.5 112.5 119.6 98.5 80.8 69.2 60.5 53.2 49.0 46.5 44.4 42.4 41.0 39.8 39.4 0 0.25 • ! 0.50+ 0.0 2.4 10.5 22.5 8L.0 108.1 108.4 93.6 79.0 67.9 59.3 52.9 48.9 46.2 44.0 42.2 40.5 39.0 • 0.50 U.75• 0.0 . 1.5 8.8 20.2 56.9 86.9 103.3 101.2 89.4 76.9 66.5 58.3 52.5 48.6 45.9 43.7 42.1 41.0 • 0.75 « i 1.0 • 0.0 0.9 7.1 17.8 44.7 67.0 89.0 99.2 95.9 85.8 74.7 65.1 57.5 52.1 48.3 45.6 43.5 42.0 • 1.0 1.5 + 0.0 0.2 3.3 12.6 27.0 36.8 53.2 72.1 66.1 90.9 80.0 80.8 72.4 64.5 53.3 52.9 49.0 46.1 • 1.5 2.0 0 0.0 1.7 8.2 19.2 23.5 30.9 43.0 58.5 73.0 82.2 85.0 82.6 77.1 70.3 63.8 58.3 53.2 0 2.0 2.5 • 0.0 0.7 5.1 14.1 17.3 21.4 27.3 36.9 48.9 61.1 71.2 77.7 79.9 77.7 73.4 68.2 62.7 t 2.5 • t 3.0 • 0.0 0.2 2.8 9.8 12.2 15.2 18.7 24.1 31.8 41.5 52.2 62.6 70.8 75.0 75.9 74.2 70.7 • 3.0 1.5 • 0.0 1.4 6.4 8.3 10.5 13.1 16.5 21.2 27.4 35.4 44.8 54.6 63.0 69.1 72.4 13.1 • 3.0 • 4.0 • 0.0 0.6 3.9 5.3 7.0 9.0 11.4 14.5 18.5 23.7 30.3 38.4 47.4 55.8 62.8 67.8 • 4.0 4.5 0 0.0 0.2 2.2 3.1 -4.4 5.9 7.7 9.9 12.6 16.0 20.4 25.0 33.2 41.1 49.2 56.5 • 4.5 • 5.0 • 0.0 0.1. 1.2 1.8 2.8 3.9 5.2 6.9 8.9 11.5 14.7 L8.4 23.8 29.8 36.8 44.1 • 5.0 i•5 • 0.0 0.7 1.0 1.6 2.4 3.3 4.6 6.1 B.0 10.3 l3.0 16.9 21.3 26.7 33.0 • 5.5 i I.G • 0.0 0.3 0.5 0.9 l.4 2.0, 2.9 4.0 5.4 7.1 9.1 11.9 15.1 19.1 24.1 • 60 « 0.0 0.1 0.2 0.4 0.6 0.9 1.3 2.0 2.8 3.7 5.0 6.6 8.5 11.1 • 7..0 a • .9.06 • 0.0 0.1 0.2 0.4 0.6 0.9 1.3 1.9 2.6 3.5 4.7 ♦ 8.3 9 • 0.0 0.1 0.2 0.4 0.6 0.9 l.2 1.8 • 9.0 • 10.0 • « 11.0 • 0.0 ).2 0.2 0.4 0.6 •10.0 • 0.) 0.2 •11.0 12.0 ! • 14.0 • •12.0 • •14.0 16.0 + r Iti.0 « t16.0 * •18.0 20.0 + • 22.0 0 •20.0, • •22.0 24 0 • + 26:C « «24.0 • •26.0 2tl.0 • • 30.0 • •28.0 s •.'0.0 s«oos ss•s«s•ss««••rr••s•srss««s«sssss«s«*«•«r«•r«««••••s+Miss«•«srrr!••r•««i«rsr•«liirsr•trr•ss•sri!•r•!•!•r•••♦ltetr••t 24 HOUR- TYPE IA DISTRIBUTICN PAGE 4 IF 66 •vt••••«t«tvv + TC 0.25 • •t•«•ttttttt• TIME OF CONCENTRATION 0.25 HRS SHEET 2 OF 3 ♦sssssss*s«r**«**••*••v♦s***v+s•sssats«*vts**«s♦*rsr•*♦*••t♦*•*♦**sts*«v«•******vrs*•vvvsstvtt*vt••t**t*tt•««•ttrvsvtv«• TRAV.* SUBAREA HYDROGRAPH TIME(HOURS) •TRAV. TIME • *TIME IHRS)*11.50 11.75 12.00 12.50 13.00 13.50 14.00 14.50 15.00 16.00 17.50 18.00 19.00 20.00 21.00 22.00 23.00 24.00 •IHRS1 **•«•«*•**••atv*•o*t*•v*vvt•a••••t*svvv*v*vt**•«v**s*•*«vv«*•v•a«s***s**vv««**rrtv•*••«v«rv••«*•tvtv•vv•tty««v••«•v••«v• 0 • 37.0 36.0 35.0 34.0 33.0 32.5 32.0 31.0 30.6 29.1 27.5 27.0 26.0 25.2 24.4 24.0 22.7 0.7 * 0 O.ZS+ 38.0 37.0 36.0 34.8 33.'8 32.8 32.9 32.2 31.0 29.6 28.1 27.8 26.5 25.5 24.4 23.8 22.7 6.5 * 0.25 0.50• .3R.n 37.0 36.2 35.0 34.0 33.4 32.8 31.6 31.0 29.5 28.7 27.2 26.2 25.2 24.4 24.0 22.9 13.2 • 0.50 0.75. 39.9 38.7 37.3 36.0 35.0 34.0 33.1 32.8 32.0 30.4 29.0 28.5 27.5 26.8 25.5 25.0 23.1 17.6 * 0.75 t + 1.0 « 40.8 39.6 38.4 35.9 34.6 3348 32.5 31.8 31.0 30.0 28.2 27.8 26.0 25.8 25.0 24.0 23.5 20.2 * 1.0 1.5 + 43.9 42.3 40.8 38.2 36.0 34.7 33.9 33.0 32.2 31.0 29.4 28.8 27.6 26.5 25.5 24.8 24.1 22.7 • 1.5 2.0 + 49.5 46.5 44.3 40.9 38.1 36.1 34.8 33.9 33.2 31.9 29.9 29.0 27.5 26.7 25.5 24.4 24.0 23.4 • 2.0 2.5 • 5T.6 53.2 49.7 44.5 40.9 38.1 36.2 34.8 33.9 32.5 30.5 30.0 28.8 27.4 26.5 25.5 24.4 24.0 * 2.5 t • 3.0 • 66.3 61.5 57.0 49.7 44.5 40.8 38.1 36.2 34.8 33.1 31.1 30.4 Z9.3 20.1 26.5 25.5 24.5 24.0 • 3.0 3.5 • 71.7 68.6 64.6 56.4 49.5 44.4 40.8 38.1 36.2 33.9 31.7 31.0 29.8 28.7 27.2 25.6 24.7 24.4 * 3.5 4.0 • 70.6 71.1 69.4 63.1 55.7 49.3 44.4 40.3 38.0 34.8 32.3 31.6 30.3 29.2 27.) 26.3 25.1 24.5 * 4.0 4.5 * 62.6 66.9 68.7 67.3 61.8 55.0 49.0 44.2 40.6 36.2 33.0 32.3 30.9 29.7 28.5 Z7.0 25.6 24.7 * 4.5 5.0 • 51.2 57.3 62.0 66.5 65.2 60.2 54.0 48.5 43.9 37.9 33.7 32.9 31.5 30.2 29.0 27.6 26.2 25.1 + 5.0 5.5 • 39.7 46.4 52.5 61.6 65.2 63.5 58.7 53.1 47.8 40.3 34.7 33.7 32.1 30.7 29.5 28.2 26.6 25.5 + 5.5 6.0 * 29.5 35.8 42.1 53.5 61.3 63.8 61.8 57.4 52.1 43.2 35.4 34.6 32.7 31.3 30.0 28.9 27.4 26.0 * 6.0 7.0 • 14.0 17.8 22.1 32.4 43.2 52.4 58.0 59.9 58.7 51.2. 40.5 38.1 34.9 32.8 31.3 30.0 28.7 27.3 • 7.0 « * 8.0 * 6.1 8.0 10.3 16.4 24.6 34.1 43.3 50.8 55.5 56.2 46.8 43.6 38.5 35.2 33.0 31.4 30.0 28.7 • 8.0 9.0 * 2.4 3.3 4.4 7.5 12.0 18.5 26.5 35.1 43.2 53.3 52.2 49.5 43.5 38.7 35.4 33.1 31.4 30.0 + 9.0 • s 10.0 • 0.8 1.2 1.7 3.1 5.3 8.8 13.9 20.4 27.9 42.752.9 52.5 48.7 43.4 38.9 35.6 33.2 31.5 •10.0 11.0 • 0.2 0.4 0.6 1.1 2.1 3.8 6.4 10.3 15.4 28.9 47.0 49.9 51.1 47.9 43.3 39.0 35.7 33.3 •11.0 • * 12.0 * 0.0 0.1 0.2 0.4 0.8 1.5 2.7 4.7 7.5 16.9 36.1 41.6 48.6 49.8 47.1 43.1 39.1 35.9 *1Z.0 14.0 * 0.0 0.2 '0.4 0.8 1.5 4.3 14.3 19.2 29.9 39.1 44.6 46.2 44.3 42.2 *14.0 + s 16.0 • 0.0 0.2 0.8 3.8 5.9 12.1 20.5 29.5 36.9 41.7 43.5 *16.0 18.0 * 0.0 0.1 0.7 1.3 3.4 7.4 13.5 21.1 28.8 35.2 *18.0 * * 20.0 + 0.0 0.1 0.2 0.7 1.9 4.4 8.7 14.5 21.4 *20.0 22.0 * 0.0 0.1 0.4 1.1 2.6 5.4 9.7 •22.0 • s 24.0 • 0.0 0.2 0.6 l.5 3.3 *24.0 26.0 + 0.0 0.1 0.3 0.9 *26.0 r • 28.0 • 0.0 0.2 *28..0 30.0 • *30.0 s ♦•♦«s♦•rrrrr•rr•sr♦ssssssssssrssssrsrtsssssrsr*•♦****+**«•***rt**s«sss*ssr*ssrrrss•rrssr•rsrrsr•rr••rssssrrrss♦•sssss•sr 24 HOUR- TYPE LA UISTRIBUTION PAGE 5 OF 66 I ` Forev:Por -=I- ••,` Duvall � � �-V o r �Kir IonP, 5k .omi.n� l Col Redmond (�Corndtion Q 1 t SEATTL Snoouolmi< j / Issoovon / North Bend � � Renton I � TUYwiI � � J_� Normonoy 1 vosnon Pork ) B l8 ItlOnd Des Kent Z2 Moines ( C f \ �. Au rn i N v \ O \ Algo Block Diomond \ 1 8�ocific 1 5-YEAR 6-HOUR PRECIPITATION `T --IB- ISOPIUVIAIS OF S YFAR 6 HOUR Enumclow n^ / PR[CIPITA110N!IN T[NFHS OF AN INCH G11 N N U AL/L�/ �1 � { � i � -IL E5 SNOHOMISH COUNTY — -- - - - - - - - - - - - - 1 CLk. Bothell � ? U I - ore Pork Duvoll C',/ v/Kir Ian Skyk i.n t l 0 Redmond � � ` A OCarnotion .1 Bellevue L� , \ISEATTL � � 2 a me car n� SnoOuolmi 'Q l bsOo on / North end / Renlon 40 Tukvilo Normondy vosnon Pork IB .� 0 /. / Itlond S Des J \ Kent Moines ( t ^ // i Au rn v \\ O Alpo Block Diomond ocilid. 45 ; / 5-YEAR 24-HOUR PRECIPITATION Enumclov, -JI-ISOPLUVIALS OF 5 Y[AR 21 HOUR 5Q PR[CIPIIATION.IN 1[NTHS OF AN INCH ANNUAL 7� 5:-:E o o-nES iwre _j 20 SNOHOMISH COUNTY _ - _ Fore At�P ra 4ro A \ \ i 1 Duvoll 5 \ 7^ $kyAomitn � � l Q Redmond /�C crnotion 7/ Dz� / / 1 ' Bellevue \.ISEATTL 18 l28 32 JL �\ I'IS Sn oQuolmi � /r 1 tocuoh `1--- North end / W Tukwil n„ L f / � Normandy 5z j Vmnon Pork IB � S Kent nee Dee �1 / Moi i Au rn \ Alga lock Diomond � _ g�oci,ic. 20 $ —� 25-YEAR 6-HOUR PRECIPITATION —34—ISOPLUVIALS OF 25-YEAR 6 HOUR Enumclo PRECIPITATION IN TENTHS OF AN INCH ANNUAL \ f•�gVrG V-V 5:e:t U SNOHOMISH COUNTY Bothell JI I/L/'Fore Pork Duval GOC/�o / 2ry,,/S Kir Ion ,(G Skykomieh Redmond 45 r�Cornotion 15 / I 1 Bellevue ,� 60 \SEATTL /� 1 I Q Mtcer 40 / I( "I h. -SnoQuolmi i It.Quoh / in end 'Q / Renlon G.t; l Tukwila /G 75 QD Normandy �O� / Voehon Pork �r Is / Ielond �<_1.05 Dee Kent Mot nee i Au rn oo 70 N \ 0 11 \ Algo Block Diomond acltic. 0 25-YEAR 24-kOUR PRECIPITATION I —14—ISOPLUVIALS OF 25 YEAR 24 HOUR Enumclo �� PRECIPITATION IN TENTHS OF AN INCH }/- rNNUAI A, � 1�4 ure -q S, E 0 Ic u1,[5 J l I 22 SHEET NO. 11 KING COUNTY AREA, WASHINGTON (RENTON QUADRANGLE-) \kF (Joins sheet 5) ArnC ISSAQUAH 12 MI. 1 10' 1 680000 FEET 122' 7'30" t• �� 1 i 47°30' p' +E •�(9 r y° i,.ighlnnd �lJ� O AgC A .'(� ��11 413 C i gtd '935 L gc An Trailer ❑. n .EvB j i ♦t� Y n I ' I �• ark. j u .8 I113 M B •3 3 ' 421T 35h6 Greenwood Ce " I EvD I r l_I 1 ^,II I AkF I 1 ' •� 180 000 AgC j :F FEET I -f9t I p r----I EvC II I � I Cem i An a I �, Il BM f�C\ It \\\ •;� AgC 321. AkF I L' FvC - ---I AkF ur AklF It. BM ------ - !! 37 n , y TAe Tom. EvB --�- -�=- A,C 11 BM137 "\\ AkF �jvE� I>y CO -� _' I 1 / � I EVB r \ 1_ / T sP AkF I It- Rh AkF AgD,` •ri. PV I !i'! •' I'�, lu ,ta q p " Ma =AkF= Sp •, '• !.,' !� '� pNg I' ., 0o c" .pV J 455 21 ;r, • iif' ;u =Ti'1 10L \�-- 17h C9� Ip RCL 1AVC AkF I A F C AkF II NI' • I \ Park _ F>v O F m e I ' EvC .... i f/7 vn:/ h if.•C', �Qrpn�J, ���ttn100�3' /YTS/ G'-Y/CJ� L rcYlsf{ rJ ryr�•; :�a+ rreSrI,l /13o1rr/ rnoWI r(71c (1PYPre , j'n'ro � rc lra r� Cuero�iJ L 25 year cJ rz�rs» C✓Pry� to/lb 5�/Prrr r�Prls F 1771e l.Airti' COnJ�'r c�ri{r.oi� 11c^r✓iCe r7rA7�oc� 2? ye-1- 2¢ �ecdr �, r. ��S i L. 5o) •t ' Q� � P � 0, B�.S' � ?so . (0.8��23q) ` D. 9�J rncli 94)]i L 9 = = 17/ PLANNING DNISION 7 Cr7y OF RENTON 00 32 �.9, ,��r'. JUL 0 7 1989 RECEIVED Trys P o con crZ n/m X"." /o o,2 el ve rq q o .f' - 2Fo 2 20 INTENSUS ENGINEERING• SURVEYING 17508 PALOMINO DRIVE•BOTHELL.WA 98012 12061 481-7282 z le ( ge,. �e✓rs C X `7(D.//) O, /9 ��✓rs (�(J'Q O,2 5 haul l� /4 •c r. �Jor.•f•- /4 lSTorrr) c7/Jfr�Odf/ovla6/a /tea qe ,6� `Fs f7ou/S ccs L Er olaEJ l�tl AIOF C eAl = 90 CA T sff e7 �. 08�/ C/�� iln✓/�S ale O./O / �fe✓I' T/?7ns T.O< /Q tP/or�9f C7/JJ�rr(,'�utL9i+ �qaC /�F L� 8/Jo✓rs PLANNING DIVISION CITY OF RENTON JUL 0 7 1989 RECEIVED I N T E N S U S ENGINEERING •SURVEYING 17508 PALOMINO DRIVE•BOTHELL WA 98012 12061 481-7282 3 ✓E c v,a I"'F i e µl- O j-E" J 74/roe o G,E'41r'N �o✓iaP l��r'npE rr7 .�4� cY�� �JErer,Tior� �L'%c� / �.s�,� 1�_ /.5o L.f h .1 p c/Qi,�/« 7a /�ELCASE Q5 ®. �3 �fS l�� ;r / 2RSI4j.00.7)t /z 4 e PLANNING DNISKW `V Crry OF REWON 2 JUL 0 7 1999 RECEIVED r 1 ► 1 /o O.,?a 0.y d. i�60 r S i Vi I 'e%qs� afe c IA N 1 G c I 11 S ENGINEERING •SURVEYING 17508 PALOMINO DRIVE•BOTHELL.WA 98012 12051 481.7282 L�'To A G F .` Iq 77r- au7yn%& .4vf' of f/ 29 o.75 d./9 0.67 0,072 m,33 O. 70 2�s ) 2.25 d,32 2.oo a.27 t ooc1� (9,97 ci 76- ^6 2.50 D,2Jt D.02 A,q8 ."h 0. 79 .3.00 O. 2�* O.OS O� .& 9.75 D. ¢2 .9..So S.Zy,f 0.05 /,/O A 95 — Ii F. PLANNING DM8ION CITY OF RENTON JUL 0 7 1989 RECE VED I 1 N T E N S U S ENGINEERING •SURVEYING 1730A PALOMINO DRIVE•BOTHELL.WA 98012 (206) 481.7282 ' s l/)(" ) n,z2 o.z7 0•az 0.00 a,/B 0,i7 6,14 ii,� �yl J og ,ou 155 .2 ,l8 17 /6 1/6 OW O,o/ G.�j3 A 61 c,y3 o,Q3 e.31- 0,2! e.14 .f .1P 2s 07 0./5 0.65 120 /.?0 /.ot o,85 o•70 c,56 4,47 0.43 F 0 O d 0,0e 0.24 0,35 /'.32 0,77 0,11 045 0.19 0.17 p , 0,07 O,o9 0.57 a,96 d•85 D.7o eA 0,44 53 �28 0.26 0.1'/ a 14 d,/4 d,/3 0.13 04 0,13 01 li 0,i 2^ .13 •13 '13 ./3 .12- 2 S 0•1l O.oy '07 ,06 .66 .04 .44 ,o/n 0� ,05 '0y j11f2s 0•¢, 0138 0,3y 134 '33 .32 .3z .3a ,3/ 29 ZS d,/,L 0115 0/4 0,/,/ ./3 /3 A /z 022 ago 110 /y /y •17 .1y IS 114 /6 /Q /4% /5 /5 i /4 /7 /8 /g s ,o� 03 ,01 oz ,oz - .l� do to oy °9 2J' ,15, .13 ,13 ,lZ .11 .09 — L PLANNN G DIVISION CITY OF RENTON JUL 0 7 1999 1 N T E N S U S ,(?�+ �� ENGINEERING • SURVEYING J"1 7EL, 17508 PALOMINO DRIVE•BOTHELL.WA 98012 12061 481.7282 �T71r00 GE voi--tJME /`�GitJI.EEO ,'&Z CJ7a/rac7c� n,� ��� A-i Q 3L /5"5- Z.f 87 L 30 " 223 Z•f. e 2Uo _ .b 18/ 70 ' 777 //2/ �f PI.ANNMlG DNISION CITY OF MWON JUL 0 71989 RECEIVED INTEICISUS ENGINEERING • SURVEYING 17508 PALOMINO DRIVE•BOTHELL.WA 98012 (206) 481-7282 ('29h�/2)/2 Q�= 0�.43. 6217 r2 j 2,rp) VL> /Z (fie 2 ENGINEERING -SURVEYING 17508 PALOMINO DRIVE-BOTHELL.WA 98012 (206)481.7282 FFTI a STD, AV _ { UNIUN WE. S.E. _ M rn z A 1 = N C Q N 1 0 ^ r lu �S =' N 7 t x z � I i s ld, 8'1-3 S 14, Q,�-2 4- if M Fx c(1 N J: s �. \41 B 3 p fD � M _ O �o 0 � 4 ENGINEERING•SURVEYING 17508 PALOMINO DRIVE•BOTHELL.WA 98012 12061 481.7282 File: UNION PLACE Page 1 UNION AVE TOP ELEV INVERT PIPE PIPE VELOCITY 143 ELEV COEF. SLOPE DIA FLOW, 0 d/D, % DESIGN 0 LENGTH 5.2 407.88 403.88 012 .0022 15 3.38 85 3.04 391 6.1 411.61 403.03 012 .0032 15 4.08 85 3.67 183 6.2 410.76 402.44 012 .003 15 4.08 90 3.51 105 6.3 409.89 402.13 .012 .0107 15 7.46 85 6.71 405 7.1 400.68 397.79 .024 .034 24 23.3 85 8.19 180 7.2 396.69 390.91 .024 .061 24 10 100 3.18 51 7.3 395.51 387.8 .024 .0009 24 10 100 3.18 460 7.4 393.18 387.37 024 .0001 24 10 100 3.18 460 8.1 395.32 387.34 - 1- _. �......�......� l �, J• � i rt I v --'-r � T i ,,',h,r � T h .. 1 _•. �1 1 l,Ll y_I• 1 rr•' 1 _. i 17 ..o • �-1, 4 J •�`a r`I�`I`"r 1 ryS � r ��,�It IL > r t ._ • .r� .. :; � J Sl !4 "�1 'h7 Lzs.s st��h��wE .-u•. - �. 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