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03483 - Technical Information Report - Flow Control Water Quality Sizing Calcs
� �- REVISION TO FLOW CONTROL AND �' WATER QUALITY SIZING CALCULATIONS Proposed New Life Christian Church Building Addition SWC — Renton-Maple Valley Highway (SR-169) and 152nd Avenue S.E. Renton, Washington Prepared for: Church Consultants P.O. Box 1526 Duvall, WA 98019 April 29, 2009 Our Job No. 11706 �EtY JACDe �^���q �� ��f w�.�y,�f S ,`= G� ri, . �� � Z7 � � ...5 ,��.�� . aE. ``: ` �5���,ti, , � � G�"�'4 l� � �� �� CIVIL ENGINEERING, LAND PLANNING,SURVEYING m �; z 18215 72ND AVENUE SOUTH KENT,WA 98032 (425)251-6222 (425)251-8782 Fa�c � \ ` " BRANCH OFFICES ♦ OLYMPIA,WA ♦ TACOMA,WA ♦ CONCORD,CA ♦ TEMECULA,CA c r s- `�� ,� www.barghausen.com �<� �P E ~C'ENG�M 3 y83 1.0 INTRODUCTION/GENERAL I:�FORMATION The New Life Church is requesting to remove the requirement for providing porous asphalt flow control BMP and provide the detention and water quality within the proposed weddetention pond. The area of porous asphalt was 0.98 ac which was modeled as 50 percent grass and 50 percent impervious in our original calculations, to size the detention facility. The calculation and methodology used to size the detention facility was Level III Flow Control criteria using the porous pavement as 50 percent grass. The new calculation has been performed with no credit for the porous pavement and the detention pond is sized using Level III Flow Control. The original calculation showed that the detention volume required for the project is 149,018 cf. The new calculation determines that the volume required with no flow control BMP is 161,839 cf. The volume provided in the pond is 172,013 cf. Please refer to the following pages for the new and original sizing calculations. The release rate during every storm event is less than the given release rate for the approved Level III Flow Control calculation. „ 11706.027.doc il - ORIGINAL LEVEL 3 FLOW CONTROL CALCULATIONS DATED OCTOBER 10, 2008 DETENTION SIZING CRITERIA Total e�sting developed site = 14.20 ac. Existing developed site to remain = 8.0 ac. Plus '/z the weddetention pond,0.45 ac. Total developed to remain = 8.45 ac. � and is considered 85 percent impervious so land cover breakdown sized per 1990 KCSWDM = 7.18 ac. impervious, CN=98 1.27 ac. landscaping, CN= 80 ' 17.50 ac. upstream forest,CN=76 �II 25.95 ac. total developed I� Pre-developed = 17.50 ac. upstream forest, CN=76 8.45 ac. pasture, CN=78.60 25.95 ac. total pre-developed I [See the attached approved TIR dated February 7, 1992, with revisions for the land cover ' breakdown explanations] (Detention volume required=60,879 c fl ' Total redevelopment area = 14.20—8.45 = 5.75 ac. considered 85 percent impervious = 4.89 ac. till grass = 0.86 ac. Apply large lot high impervious BMP per the 2005 KCSWDM; use 20 percent of new impervious as porous asphalt, which is modeled as 50 percent impervious and 50 percent till grass. (4.89 ac.)(20%) = 0.98 ac.porous asphalt so 0.49 ac. +0.86 ac. = 1.35 ac. till grass with 4.40 ac. impervious Per the 2005 KCSWDM,the pre-developed condition must be modeled as the historic condition, so Pre-developed = 5.75 ac.till forest Detention volume required for redevelopment= 88,139 cf 11706.027.doc DETERMINE THE PROVIDED LIVE STORAGE ' Area Volume Sum Volume Elev. (sq.ft.) (cu.ft.) (cu.ft.) , 101.5 26,313 13,511 13,Sll 102 27,730 I 28,511 42,022 � 103 29,292 30,072 72,094 I 104 30,853 31,667 103,761 , 105 32,480 33,292 137,053 106 34,104 34,960 172,013 107 35,816 TOTAL LIVE STORAGE PROVIDED = 172,013 cu. ft. TOTAL LIVE STORAGE REQUIRED = 88,139+ 60,879 = 149,018 cu. ft. SO, OKAY The amount of Madsen Creek floodplain filling is approximately 2,608.7 cubic feet between elevations 101.0 and 103.26. The total excess storage in the detention pond is 172,013 cubic feet— 149,018 cubic feet= 22,995 cubic feet. This compensating storage is more than enough. Please see Section 5.0 for the floodplain map and backwater calculations. 11706.027.doc SIZE THE EAST SIDE WET POND FOR THE REDEVELOPMENT PORTION Basic Water Quality V� _ [0.9(A;)+0.25(A��] 0.039 _ [(0.9)(4.40)+(0.25)(1.35)] (0.039)(43,560) = 7,301 cu. ft. Vb = 3V� = 21,903 cu. ft. 11706.027.doc DETERMINE WET POND VOLUME PROVIDED Cell 1 Area Volume Sum Volume � Elev. (sq. ft.) (cu.ft.) (cu.ft.) 97 4,240 4,524 4,524 98 4,807 5,104 9,628 99 5,401 5,781 15,409 100 6,162 6,486 21,895 101 6,810 3,512 25,407 101.5 7,238 Cell 1 I 97 14,236 14,751 14,751 98 15,265 15,795 30,546 99 16,325 16,865 47,411 100 17,405 17,958 65,369 101 18,512 9,397 74,766 101.5 19,075 TOTAL WET POND VOLUME PROVIDED = 25,407 +74,766 = 100,173 cu. ft. TOTAL VOLUME REQUIRED = 12,301 +21,903 = 34,204 cu. ft. SO, OKAY 11706.027.doc =�'j � �`�,�; , �,�f'-�-t.`• L--� f�= �-�'��-�•'� � KCR`I'S Comrnand ^ � ' � � /'�lt'�L,+' ��C`.1'r��t � ------------- ��` - . � CREATE a new Time Series r ------------------------ �t,- Lc�`J, �►� � 'h��' �'� , ;. . � Production of Runoff Time Series Project Location : Sea-Tac - ;i;�' �� Computing Series : 117061v13pre. Lsf � �� r`� �/�� � � r � Regional Scale Factor : 1 .00 �/ Data Type : Reduced /C ' � � i Creating Hourly Time Series �'ile Loading Time Series ['ile:C:\KC_SWUM\KC_DA`I'A\S`M'F60It.rnf . Till Forest 5.75 acres Total Area : 5.75 acres Peak Discharge: 0.464 CFS at 9:00 on Jan 9 in Year 8 , Storing Time Series Fil.e: l_17061v13pre.tsf . I Time Series Computed KCR`PS Command I:nter lhe Ana 1 ys i s 'POOLS Modu)e ------------------------------ � /1na3ys:is '('ools Command -------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:117061v13pre. tsf . 1'low Frequency Analysis -------------------------------------------------------- `Pi.r,ie S�ri.es File:117�J61.v13pre.tsf Project T,ocation:Sea-Tac F�requ�ncies & Peaks saved Lo File:117061v13pr.e.pks . ��nalysis '1'ools Command ---------------------- 1?I:TUI2IJ to Previ ous Menu !�:C�?TS Command C'i.�:i:':'�: a new Time Series ------------------------ l�roduction of Runoff 'I'ime Series 1�rojecL Locat�on : Sca-Tac Computing Series : 1]�061v]3dev. tsf I?cgic�nal Scal.c FacLor : i. 00 DaLa 7'ype : Eteduced ;'reat ing ttourly Time Seri es Fil e Loading 'I'ime Series P'i.lc:C: \KC_SWDM\KC__D11T11\STTG6QR.rnf . �i�ill Grass 1 .35 acres Loading Time Series File:C:\KC_SWDM\KC_DATA\STEI60R.rnf . lmpervious 4 .40 acres ' -------------- I � Total Area : 5.75 acres Peak Discharge: 2.36 CFS at 6:00 on Jan 9 in Year 8 Storing Time Series File:117061v13dev.tsf . ' Time Series Computed ' KCRTS Command ------------- �� Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:117061v13dev.tsf . Flow Frequency Analysis � -------------------------------------------------------- Time Series File: 117061v13dev.tsf I Project Location:Sea-Tac Frequencies & Peaks saved to File:117061v13dev.pks . Analysis Tools Command I ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:117061v13pre. tsf . Computing Flow Durations Durations & Exceedence Probabilzties to File:11706].vl3target.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command Size a Retention/Detention FACILITY ----------------------------------- Edit Facility Loading Time Series File:117061v13dev.tsf . Time Series Found in Memory:117061v13dev. tsf . Saving Retention/Detention Facility File:117061v13 .rdf . Starting Documentation File:C: \kc_swdm\kc_data\example\kcrts\117061v13 .doc . Time Series Found in Memory:117061v13dev.tsf . Edit Complete Retention/Detention Facility Design ----------------------------------- Route Hydrographs (/w listing) through Facility ----------------------------------------------- Time Series Found in Memory:117061v13dev. tsf . � Route Hydrographs through R/D Facility rlow rrequency Analys�� Time Series File:117061v13pre.tst Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis---- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Proi� (CFS) (CFS) Period 0.363 2 2/09/01 18:00 0.464 1 100.Q0 0.99G 0.099 7 1/06/02 3:00 0.363 2 25.00 0.96G 0.269 4 2/28/03 3:00 0.278 3 10.00 fl.90G 0. 010 8 3/24/04 20:00 0 .269 4 5. 00 0 .80Q 0.160 6 1/05/OS 8:00 0.235 5 3 . 00 0.667 0.278 3 1/18/06 21:00 0.160 6 2 .00 0.500 0.235 5 11/24/06 4:00 0.099 7 1.30 0.231 0 .464 1 1/09/08 9: 00 d.010 8 1.10 0 .091 Computed Peaks 0 . 430 50. 00 C . 980 Flow Frequency Analysis Time Series File:117061v13dev.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.19 6 2/09/01 2:00 2 .36 1 100.00 0.990 1.00 8 1/OS/02 16:00 1.63 2 25.00 0.960 1.42 3 2/27/03 7:00 1.42 3 10.00 0.900 I.12 7 8/26/04 2:00 1.34 4 5.00 0.800 1.34 4 10/28/04 16:00 1 .26 5 3.00 0 .667 1.26 5 1/18/06 16:00 1 .19 6 2.00 0 .500 1. 63 2 10/26/06 0:00 1.12 7 1.30 0 .231 2.36 1 1/09/08 6:00 1.00 8 1.10 0 .091 Computed Peaks 2 .12 50.00 0.980 pi - , i _ � Flow Frequency Analysis Time Series File:117061v13rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.287 2 2/09/01 21 :00 0.450 5.53 1 100.00 0.990 0.075 7 1/07/02 4:00 0.287 5.36 2 25.00 0.960 0.213 3 3/06/03 22 :00 0.213 4.81 3 10.00 0.900 �.064 8 8/26/04 7 :0� 0.205 4 . 66 4 5.00 0.800 0.076 6 1/08/05 5:0� 0.144 3 .85 5 3.00 0.667 0.144 5 1/19/06 0: 00 0.076 3.43 6 2.00 0 .500 0.205 4 11/24/06 8:00 0.075 3.40 7 1.30 0.231 0 .450 1 1/09/08 12 :00 0.064 2 .45 8 1.10 0.091 Computed Peaks 0.395 5.52 50.00 0.980 �� � � i y , � � --� ��I � Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 2.00 H:1V Pond Bottom Length: 219.00 ft Pond Bottom Width: 58.50 ft Pond Bottom Area: 12812. sq. ft Top Area at 1 ft. FB: 20703. sq. ft ' 0.475 acres Effective Storage Depth: 5.50 ft , Stage 0 Elevation: 101.50 ft � Storage Volume: 88139. cu. ft � �E /G�/%7�'�n tt�0(uw�� 2. 023 ac-� Riser Head: 5.50 ft 1 �u�``���rt� Riser Diameter: 18.00 inches Number of orifices: 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft} (in) (CFS) iin) 1 0.00 1 .23 0.095 2 3 .50 2 .00 0.153 4 .0 Top Notch Weir: Rectangular Length: 1.00 in Weir Height: 4.95 ft Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation Surf Area (ft? (ft) (cu. ft) (ac-ft) {cfs) (cfs} (sq. ft) 0. 00 101.50 0. 0.000 0.000 0.00 12812. 0. 01 101.51 128. 0.003 0.005 0.00 12823. 0. 03 1d1.53 385. 0 .009 0.007 O.OQ 12845. 0. 04 101. 54 513 . 0.012 0.008 0.00 12856. 0. 05 101.55 642. 0.015 0.009 0.00 12867 . 0. 06 101.56 771. 0.018 0.010 0.00 12878. 0. 08 101.58 1029. 0.024 Q.011 0. 00 12900 . 0.09 101. 59 1158. 0 .027 0.012 0. 00 12912. 0. 10 101.60 1287 . 0.030 0.013 0. 00 12923 . 0.21 101.71 2715. 0.062 0.019 0.00 13045. 0. 32 101.82 4157. 0.095 0.023 0.00 13168. 0.43 101.93 5612. 0.129 0.027 0.00 13292 . 0. 53 102 .03 6947. 0.159 0.030 0.00 13404. 0. 64 102 .14 8428. 0.193 0.033 0.00 13528. 0.75 102 .25 9923. 0.228 0.035 0.00 13653 . 0. 86 102 .36 11432. 0.262 0.038 0.00 13778. 0.96 102.4b 12815. 0.294 0.040 0. 00 13892 . 1 . 07 102.57 14350. 0.329 0. 042 0. 00 14018 . 1. 18 102 . 68 15899. 0 .365 0.044 0.00 14144 . 1 .29 102 .79 17462 . O .�i01 0.046 0. 00 14270 . 1.40 102 .90 19039. 0.437 0.048 0.00 14397 . 1. 50 103 .00 20484. Q.470 0.050 0. 00 14513 . 1. 61 103 .11 22087. 0.507 0 .052 0.00 14640 . 1.72 103.22 23705. 0.544 0.053 0.00 14768 . � 1.83 103.33 25336. 0.582 0.055 0.00 14896 . 1. 94 103.44 26982. Q. 619 0.057 Q .00 15025 . 2 .Q4 103.54 28490. 0 . 654 0 .058 0 .00 15142 . 2 .15 103.65 30163 . 0. 692 0.060 0 .00 15272 . 2.26 103 .76 31850. 0 .731 0 .061 0 .00 15402 . 2 .37 103 .87 33552. 0.770 0.063 0.00 15532 . 2 .47 103 .97 35111. 0 .806 0.064 0.00 15651 . 2 .58 104.08 36840. 0.846 0.065 0.00 15782 . 2 . 69 104.19 38583. 0.886 0. 067 0.00 15913 . 2 . 80 104.30 40340. 0.926 0.068 0.00 16045. 2 .91 104.41 42113. 0.967 0.069 0.00 16177 . 3 .01 104.51 43736. 1.004 0. 071 0.00 16298 . 3 .12 104.62 45536. 1.045 0.072 0.00 16430. 3 .23 104.73 47351. 1.087 0.073 0.00 16564. 3 .34 104.84 49180. 1.129 0.074 0.00 16697 . 3 .45 104.95 51025. 1.171 0.076 O. OQ 16831. 3.50 105.00 51868. 1.191 0.076 0. 00 16893 . 3.52 105.02 52206. 1.198 0.077 0. 00 16917 . 3.54 105.04 52544. 1.206 0.080 0 .00 16941 . 3 .56 105.06 52883. 1 .214 0. 084 0 . 00 16966. 3 .58 105.08 53223. 1 .222 0.090 0 . 00 16990. 3.60 105.10 53563. 1 .230 0.098 0.00 17015. 3 .62 105.12 53904. 1 .237 0.106 0.00 17039. 3 . 65 1Q5.15 54415. 1.249 0.116 0.00 17076. 3 . 67 1d5 .17 54757. 1.257 0.122 0.00 17101 . 3 . 69 105.19 55099. 1.265 0.125 0.00 17125 . 3 .80 105 .30 56991. 1.308 0.138 0.00 17261. 3 .90 105.40 58723. 1.348 0.149 0. 00 17384. 4. 01 105.51 60642. 1.392 0.159 0 . 00 17520. 4 .12 105.62 62577. 1 .437 0 .168 0. 00 17656. 4 .23 105.73 64527 . 1 .481 0 .176 0 . 00 17793 . 4. 33 105 . 83 66312 . 1 .522 0.184 0.00 .17918 . 4 . 44 105.94 68291. 1 .568 0.191 0. 00 18055. 4 . 55 106.05 70285. 1.614 0.198 0. 00 18193 . 4 . 66 106.16 72293. 1 .660 0.205 0. 00 18332 . 4 .77 106.27 74318. 1.706 0.211 0. 00 18470. 4 . 87 106.37 76171. 1 .749 0.217 0. 00 18597 . 4.95 106.45 77663. 1.783 0.221 0.00 18698. 5.02 106.52 78975. 1 .813 0.229 0.00 18787. 5.09 106.59 80293. 1 .843 0.238 0.00 18876. 5.16 106.66 81617 . 1.874 0.247 0.00 18965. 5.22 106.72 82757. 1.900 0.259 0.00 19042 . 5 .29 106.79 84094. 1 .931 0.272 0. 00 19131 . 5 .36 106.86 85436. 1 .961 0.286 0 . 00 19221. 5.43 106.93 86784. 1.992 0.301 0. 00 19311. 5.50 107.00 88139. 2 . 023 0 .316 0. 00 19401. 5. 60 107.10 90086. 2 . 068 0 .783 0.00 19529. 5.70 107.20 92045. 2 .113 1.630 0.00 19658 . 5. 80 107.30 94018. 2 .158 2 .730 0.00 19788. 5.90 107.40 96003. 2 .204 4.030 0.00 19917. 6. 00 107.50 98001. 2 .250 5.500 0.00 20048. 6.10 107 .60 100012. 2 .296 6.930 0.00 20178. 6.20 107.70 102037. 2 .342 7 .470 0.00 20309. 6 . 30 107.80 104074. 2 . 389 7 .960 0.00 20440 . 6.40 107 .90 106125. 2 .436 8.430 0.00 20571. 6.50 108.00 108188. 2 .484 8.870 0.00 20703 . 6. 60 108.10 110265. 2 .531 9.290 0.00 20834 . 6.70 148.20 112355. 2 .579 9.690 0.00 20967 . 6.80 108 .30 114458. 2 .628 10.070 0.00 21099 . 6. 90 108 .40 116575. 2 .676 10.440 0.00 21232 . 7. 00 108.50 118705. 2 .725 10.800 d.00 21366. 7 .10 108.60 120848. 2 .774 11.150 0.00 21499. 7 .20 108.70 123005. 2 .824 11.480 0.00 21633 . 7 .30 108.80 125175. 2 .874 11.810 0.00 21767 . 7 .40 108 .9� 127358. 2 .924 12 .120 0.00 21902 . 7 . 50 109 .00 129555. 2 .974 12 .430 0.00 22037 . Hyd Inflow Outflow Peak Storage Target Calc Stage Elev (Cu-Ft) (Ac-Ft) 1 2 .36 0.46 0.45 5.53 107.03 88694 . 2 .036 2 1.19 ******* 0.29 5.36 106.86 85503 . 1 .963 3 1 .42 ******* 0.21 4. 81 106.31 75047. 1.723 4 1 . 63 ******* 0.20 4. 66 106.16 72290. 1.6b0 5 1 .26 ******* 0.14 3 . 85 105.35 57898. 1 .329 6 1 .34 ******* 0.08 3.43 104.93 50739 . 1.165 7 1 . 00 ******* 0.08 3 .40 104.90 50210. 1 .153 8 1 .12 ******* 0. 06 2.45 103.95 34735 . 0 .797 ---------------------------------- Route Time Series through Facility Inflow Time Series File:117061v13dev.tsf Outflow Time Series File:117061v13rdout Inflow/Outflow Analysis Peak Inflow Discharge: 2 .36 CFS at 6:00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.450 CFS at 12 :00 on Jan 9 in Year 8 Peak Reservoir 5tage: 5.53 Ft Peak Reservoir Elev: 107 .03 Ft Peak Reservoir Storage: 88694. Cu-Ft . 2.036 Ac-Ft Flow Frequency Analysis 'I'ime Series File:117061v13rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) {CFS) (ft) Period 0.287 2 2/09/O1 21: 00 0.450 5.53 1 100.00 0.990 �.075 7 I/07/02 4:00 0.287 5.36 2 25.00 0.960 0.213 3 3/d6/03 22:00 0.213 4.81 3 10.00 0.900 0.064 8 8/26/04 7:00 0.205 4.6b 4 5.00 0.800 0.076 6 1/08/05 5:00 0.144 3.85 5 3.00 0.667 0.144 5 1/19/06 O:QO 0.076 3.43 6 2.00 0.500 0.205 4 11/24/06 8: 00 Q.075 3 .40 7 1.30 0.231 0.450 1 1/09/08 12:00 0.064 2 .45 8 1.10 0.091 Computed Peaks 0.395 5.52 50.00 0.980 Flow Duration from Time Series File:1i7061v13rdout. tsf Cutoff Count Frequency CDF Fxceedence_Probability CFS � � � ' 0.004 26842 43 .774 43 .774 56.226 0.562E+00 0.012 6032 9 .837 53.611 46 .389 0.464E+00 0.020 5491 8.955 62 .565 37 .435 0.374E+00 0.028 4946 8.066 70.631 29.369 Q.294E+00 0.036 5151 8.400 79.031 20.969 0.210E+OG 0. 044 4163 6.789 85.820 14.280 0.142E+00 0 . 052 3232 5.271 91.091 8.909 0.891E-01 0.060 1878 3 .063 94.154 5.846 0.585E-01 0.068 1808 2 .948 97 .102 2 .898 0.290E-01 0.077 1302 2.123 99 .225 0.775 0.775E-02 0.085 60 0.098 99.323 0.677 0.677E-02 0.093 24 0.039 99.362 0.638 0.538E-02 0 . 101 I2 0.020 99.382 0.618 0. 618E-02 0 .109 14 0.023 99.405 0.595 0.595E-02 0.117 17 0.028 99.432 0.568 0.568E-02 0.125 31 0.051 99.483 0.517 0.5I7E-02 0.133 45 0.073 99.556 0.444 0.444E-0� 0 .141 47 0.077 99.633 0.367 0.367E-0� 0 .149 45 0.073 99 .706 0.294 0.294E-0� 0 . 157 23 0.038 99:744 0.256 0.256E-02 0.165 17 0.028 99.772 0.228 0.228E-02 0.173 14 0.023 99.795 0.205 0.205E-02 0.181 15 0.024 99.819 0.181 0.181E-02 0.189 18 0.029 99.848 0.152 0.152E-02 0.197 17 0.028 99 . 876 0.124 0.124E-02 0 .205 22 0 .036 99 .912 0.088 0.881E-03 0 .213 15 0.024 99 .936 0.064 0.636E-03 0.221 12 0.024 99.956 0.044 0.440E-03 0.229 6 0.010 99.966 0 .034 0.342E-03 0 .237 7 0.011 99.977 0.023 0.228E-03 0 .246 2 0.003 99.980 0.020 0.196E-03 0 .254 2 0.003 99.984 0.016 0.163E-03 0 .262 2 0.003 99.987 0.013 0.130E-03 0.270 2 0.003 99 .990 0.010 0.978E-04 0.278 1 0.002 99 .992 0.008 0.815E-04 0.286 3 0.005 99.997 0.003 0.326E-04 Duration Comparison Anaylsis Base File: 117061v13pre.tsf New File: 117061v13rdout. tsf Cutoff Units : Discharge in CFS -----Fraction of Time----- ---------Check of Tolerance------- Cutoff Base New �Change Probability Base New �Change 0 .08Q � 0.95E-02 0.72E-02 -24.7 i 0.95E-02 0. 080 0.075 -5.1 0 . 101 � 0.63E-02 0 .61E-02 -2 .8 � 0.63E-02 0.101 0. 094 -7 .4 0. 123 � 0.49E-02 0.53E-02 7 .3 � 0.49E-�2 0.123 0.127 3 .5 0.145 � 0.37E-02 0.32E-02 -13 .7 � 0 .37E-02 Q.145 0.141 -2 .8 0.167 � 0.29E-02 0.22E-02 -22 .2 � 0.29E-02 0.167 0.151 -9 .7 0.188 � 0.22E-02 0.15E-02 -29 .6 � 0.22E-02 0.188 0.168 -11. 0 0 .210 � 0.15E-02 0.73E-03 -5Q.5 � 0.15E-02 0 .210 Q.191 -9.3 0.232 � 0.10E-02 0.33E-03 -67.7 � 0 .10E-02 0.232 0 .204 -12 .2 0.254 � 0.62E-03 0.16E-03 -73.7 � 0.62E-03 0.254 0 .214 -15.8 0.275 � 0.34E-03 0.82E-04 -76.2 � 0.34E-03 0.275 0 .229 -16 .8 0.297 � 0.21E-03 O.00E+00 -100.0 � 0.21E-03 0.297 0 .244 -17 .8 0 .319 � 0.16E-03 O.00E+00 -100.0 � 0.16E-03 0.319 0.256 -19 .8 0 .341 � 0.98E-04 O.00E+00 -100.0 � 0.98E-04 0.341 0.273 -19.8 0.362 � 0.16E-04 O.00E+00 -100.0 � 0 .16E-04 0.362 0.287 -20.9 Maximum positive excursion = 0.�08 cfs ( 7. 0�) occurring at 0.114 cfs on the Base Data:117061v13pre.tsf and at 0.122 cfs on the New Data:117061v13rdout.tsf Maximum negative excursion = 0. 075 cfs (-22.2�) occurring at 0.337 cfs on the Base Data:117061v13pre.tsf and at 0.262 cfs on the New Data:117061v13rdout.tsf I Flow Duration from Time Series File: 117061v13pre.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS $ $ � 0.080 60747 99.066 99.066 0.934 0 .934E-02 0.090 108 0.176 99.242 0.758 0 .758E-02 0.100 73 0.119 99 .361 0. 639 0.639E-02 0.110 41 0.067 99 .428 0.572 0.572E-02 0.120 37 0.060 99 .488 0.512 0.512E-02 0.130 38 0.062 99.550 0.450 0.450E-02 Q.140 36 0.059 99.609 0.391 0.391E-02 0.150 28 0.046 99.654 0.346 Q.346E-d2 0.160 23 0.038 99.692 0.308 0.308E-02 0.170 22 0 .036 99.728 0.272 0.272E-02 0.180 15 0.024 99.752 0.248 0.248E-02 0.190 19 0.031 99.783 0.217 0.217E-02 0.200 24 0.039 99.822 0.178 0.178E-02 0.210 18 0.029 99 .852 0.148 0.148E-02 0.220 12 0.020 99 .871 0.129 0.129E-02 0.230 16 0.026 99 .897 0.103 0.103E-02 0.240 12 0.020 99 .917 0.083 0. 832E-03 0 .250 10 0.016 99.933 0.067 0.669E-03 0 .260 9 0.015 99 .948 Q.052 0.522E-03 0.270 8 0.013 99.961 0.039 0.391E-03 0.280 6 0.01d 99.971 0.029 0.294E-03 0.290 2 0.003 99.974 0.026 0.261E-03 0.300 3 0.005 99.979 0.021 0 .212E-03 0.310 2 0.003 99 .982 0.018 0 .179E-03 0.320 1 0.002 99 .984 0. 016 0.163E-03 0.330 1 a.002 49 .985 0. 015 0.147E-�3 0.340 2 0.003 99.989 0.011 0.114E-03 0.350 3 0. 005 99.993 0.007 0. 652E-04 0.360 3 0. 005 99.998 0.002 0 .163E-04 0.370 1 0 .002 100.000 a.000 O. O00E+00 0.380 0 0.000 100.000 0.000 O.�00E+00 0.390 0 0.000 100.000 0.000 O .O00E+00 0.400 0 0.000 100.000 0.000 O.O00E+00 0.410 0 0.000 100.000 0.000 O.O00E+00 0.420 0 0.000 100.000 0.000 O.O00E+00 n . q�� �? n��!n ' ��1 nr�n n nnn n ^.nn�+r� '�, ) Flow Duration from Time Series File:117061v13rdout. tsf Cutoff Count Frequency CDF F�cceedence_Probability CFS � � � 0 .004 26842 43 .774 43 .774 56 .226 0.562E+00 0.012 6032 9.837 53 .611 46.389 0.464E+00 0.020 5491 8.955 62 .565 37 .435 0.374E+00 0 .028 4946 8.066 70. 631 29.369 0.294E+00 0 .036 5151 8.400 79 . 031 20.969 0.210E+00 0 .044 4163 6.789 85 . 820 14.180 0 .142E+00 0 .052 3232 5.271 91.091 8.909 0 . 891E-01 0.060 1878 3 .063 94.154 5.846 0 .585E-01 0.068 1808 2 .948 97 .102 2 .898 0.290E-01 0.077 1302 2 .123 99 .225 0.775 0.775E-02 0.085 60 0.098 99.323 0.677 0. 677E-02 0.093 24 0.039 99.362 0.638 0.638E-02 0.101 12 0.020 99.382 0.618 a.618E-02 0 .109 14 0.023 99 .405 0.595 0.595E-02 0.117 17 0.028 99.432 0.568 0.568E-02 0.125 31 Q.051 99.483 0.517 0.517E-02 0 .133 45 Q.073 99.556 0.444 0.444E-02 0.141 47 0.077 99.633 0 .367 0.367E-02 0 .149 45 0.073 99.706 0 .294 0.294E-02 0.157 23 0.038 99.744 0.256 a .256E-02 0.165 17 0 .028 99 .772 0.228 0 .228E-42 0.173 14 0.023 99 .795 0.205 0 .205E-02 0.181 15 0.024 99 .819 0.181 0 . 181E-02 0.189 18 O.fl29 99. 848 0.152 0.152E-02 0.197 17 0.028 99.876 0.124 0.124E-02 0.205 22 0.036 99.912 0.088 0. 881E-03 0.213 15 0.024 99.936 0.064 0. 636E-03 0.221 12 0.020 99 .956 0.044 0.440E-03 0.229 6 0.010 99 .966 0.034 0.342E-03 0.237 7 0.011 99 .977 0.023 0.228E-03 0 .246 2 0.003 99 .980 0. 020 0.196E-03 0.254 2 O. OQ3 99.984 0. 016 0 .163E-03 0.262 2 0.003 99.987 0. 013 0.130E-03 0 .270 2 0.003 99.990 0.010 0 . 978E-04 0.278 1 O.OQ2 99 .992 d.008 0.815E-04 0.286 3 0 .005 99 .997 0.003 0. 326E-04 , i Duration Comparison Anaylsis Base File: 117061v13pre.tsf New File: 117061v13rdout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time----- ---------Check of Tolerance------- Cutoff Base New �Change Probability Base New �Change 0.080 � 0.95E-02 0 .72E-02 -24.7 � 0 .95E-02 0.080 0.075 -5 .1 0. 101 � 0. 63E-02 0 .61E-02 -2 .8 � 0 . 63E-02 0.101 0.094 -7 .4 0.123 � 4.49E-02 0 .53E-02 7 .3 ( 0.49E-02 0.123 0.127 3 .5 0.145 � 0.37E-02 0.32E-02 -13 .7 ( 0 .37E-02 0.145 0.141 -2 .8 0.167 � 0.29E-02 0.22E-02 -22 .2 � 0 .29E-02 0.167 0 .151 -9 .7 0.188 � 0.22E-02 0 .15E-Q2 -29 .6 � 0.22E-02 0.188 0 .168 -11 .0 0.210 � 0.15E-02 0.73E-03 -50.5 � 0.15E-02 0.210 0.191 -9 .3 0.232 � 0.10E-02 0 .33E-03 -67 .7 � 0.10E-02 0.232 0.204 -12 .2 0.254 � 0. 62E-03 0 .16E-Q3 -73 .7 ( 0 . 62E-03 0.254 0 .214 -15.8 0.275 � 0.34E-03 0.82E-Q4 -76.2 � 0 .34E-03 Q.275 0 .229 -16.8 0.297 � 0. 21E-03 O.00E+00 -100.0 � 0 .21E-03 0.297 0 .244 -17 . 8 0.319 � 0. 16E-03 O.00E+dO -100.0 � 0 .16E-03 0.319 0 .256 -19 . 8 0.341 � 0. 98E-04 O.00E+00 -100.0 ( 0 .98E-04 0.341 0 .273 -19 .8 0.362 � 0. 16E-04 O.00E+60 -100.0 � 0 .16E-04 0.362 0.287 -20 .9 Maximum positive excursion = 0.008 cfs ( 7 .0�) occurring at 0 .114 cfs on the Base Data:117061v13pre.tsf and at 0.122 cfs on the New Data:117061v13rdout.tsf Maximum negative excursion = 0.075 cfs (-22 .2�} occurring at 0.337 cfs on the Base Data:117061v13pre.tsf and at 0.262 cfs on the New Data:117061v13rdout. tsf �� �� � ' �• J � 1 I 1 i i { i � ' , ,_ 1 � - 1 I ,._l i � l � _I � � �� � WATER QUALITY SIZING CALCULATIONS �� � SIZE THE EAST SIDE WET POND FOR THE REDEVELOPMENT PORTION Basic Water Quality V� _ [09(A;)+0.25(A��] 0.039 _ [(0.9)(4.89}+(0.25)(0.86)] (0.039)(43,560) = 7,842 cu. ft. Vb = 3Vr = 23,526 cu. ft. 11706.027.doc DETERMINE WET POND VOLUME PROVIDED Cell l Area Volume Sum Volume Elev. (sq. ft.) (cu.ft.) (cu.ft.) 97 4,240 4,524 4,524 98 4,807 5,104 9,628 99 5,401 5,781 15,409 100 6,162 6,486 21,895 101 6,810 3,512 25,407 101.5 7,238 Cell l 97 14,236 14,751 14,751 98 15,265 15,795 30,546 99 16,325 16,865 47,411 100 17,405 17,958 65,369 101 18,512 9,397 74,766 101.5 19,075 TOTAL WET POND VOLUME PROVIDED = 25,407 +74,766 = 100,173 cu. ft. TOTAL VOLUME REQUIRED = 12,301 +23,526 = 35,827 cu. ft. SO, OKAY 11706.027.doc REVISED LEVEL 3 FLOW CONTROL CALCULATIONS DATED APRIL 16, 2009 i � ) ii i � �. � i� �1 � ; � _J I �' 1 � l � , i ( DETENTION SIZING CRITERIA , , , il '�_� ,_ � ; , _, _, �,� 1 ;- , ; ; i � , � DETENTION SIZING CRITERIA FOR THE REDEVELOPMENT PORTION Total redevelopment area = 14.20—8.45 = 5.75 acres 'I Considered 85 percent impervious = 4.89 acres ' Till grass = 0.86 acre Apply no flow control BMPs Pursuant to the 2005 King County, Washington Surface Water Design Manual, the pre-developed condition must be modeled as the historic condition, so pre-developed=5.75 acres of till forest. � Detention volume required= 100,960 cf. 11706.027.doc DETERMINE THE PROVIDED LIVE STORAGE Area Volume Sum Volume Elev. (sq.ft.) (cu.ft.) (cu.ft.) 101.5 26,313 13,511 13,511 102 27,730 28,511 42,022 103 29,292 30,0'72 72,094 104 30,853 31,667 103,761 105 32,480 33,292 137,053 106 34,104 34,960 172,013 107 35,816 TOTAL LIVE STORAGE PROVIDED = 172,013 cu. ft. TOTAL LIVE STORAGE REQUIRED = 100,960+60,879 = 1b1,839 cu. ft. SO,OKAY The amount of Madsen Creek floodplain filling is approximately 2,608.7 cubic feet between elevations 101.0 and 103.26. The total excess storage in the detention pond is 172,013 cubic feet — 161,839 cubic feet= 10,174 cubic feet. This compensating storage is more than enough. 11706.027.doc Return Period 2 5 10 20 50 100 ��o 11706bIv13rdouLpks in Sea-Tac • 11706b1vl3pre.pks � R . • N � � � • � u. U a� a� �p'� . � U � 00 10 '� • 1 2 5 10 20 30 40 50 60 70 80 90 95 98 99 Cumulative Probability � � 0 1 17C)G!�ivl3rduui.�ittr ' 1�;'?i',f�lv;3t,�srt��.t rit:� « , . • R M O � � N U \/ � N � O �6 L U N � � � �� � O 10 �$ 10 �4 10 -3 10 �2 10 �� 10� Probability Exceedence _l � � KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : 11706b1v13pre.tsf Regional Scale Factor : 1.00 Data Type : Reduced Creating Hourly Time Series File Loading Time Series File:C: \KC_SWDM\KC_DATA\STTF60R.rnf . Till Forest 5.75 acres -------------- Total Area : 5 .75 acres Peak Discharge: 0.464 CFS at 9:�0 on Jan 9 in Year 8 Storing Time Series File:1170bblvl3pre.tsf . Time 5eries Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- I' Analysis Tools Command ---------------------- ', Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:11706b1vl3pre.tsf . , Flow Frequency Analysis -------------------------------------------------------- Time Series File:11706b1vl3pre.tsf Project Location:Sea-Tac Frequencies & Peaks saved to File:11706b1vl3pre.pks . Analysis Tools Command ---------------------- RETURN to Previous Menu KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : 11706b1v13dev.tsf Regional Scale Factor : 1.00 Data Type : Reduced Creating Hourly Time Series File Loading Time Series File:C: \KC_SWDM\KC_DATA\STTG60R.rnf . Till Grass 0.86 acres Loading Time Series File:C:\KC_SWDM\KC_DATA\STEI60R.rnf . Impervious 4 . 89 acres ' ------------- Total Area : 5.75 acres Peak Discharge: 2 .49 CFS at 6:00 on Jan 9 in Year 8 Storing Time Series File:11706b1vl3dev.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PF.AKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:11706b1v13dev.tsf . Flow Frequency Analysis -------------------------------------------------------- Time Series File:11706b1vl3dev. tsf Project Location:Sea-Tac Frequencies & Peaks saved to File:11706b1v13dev.pks . Analysis Tools Command Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:11706b1vl3pre. tsf . Computing Flow Durations Durations & Exceedence Probabilities to File:ll'706b1vl3target.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu I KCRTS Command Size a Retention/Detention FACILITY ----------------------------------- Edit Facility Loading Time Series File:11706b1vl3dev. tsf . Time Series Found in Memory:11706b1v13dev.tsf . Saving Retention/Detention Facility File:11706b1v13 .rdf . Starting Documentation File:C: \kc_swdm\kc_data\example\kcrts\11706b1v13 .doc . Time Series Found in Memory:11706b1vl3dev. tsf . Edit Complete Retention/Detention Facility Design ----------------------------------- Saving Retention/Detention Facility File:11706b1v13 .rdf . Starting Documentation File:C: \kc_swdm\kc_data\example\kcrts\11706b1v13 .doc . Time Series Found in Memory:11706b1vl3dev.tsf . Flow Frequency Analysis Time Series File:11706b1v13pre.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS} Period 0 .363 2 2/09/01 18:00 0.464 1 100.00 0.990 0 . 099 7 1/06/02 3:00 0.363 2 25. 00 0.960 0.269 4 2/28/03 3:00 0.278 3 10. 00 0.900 0 _010 S 3/24/04 20:00 0.269 4 5. 00 0.800 0.160 6 1/05/OS 8:00 Q.235 5 3 . 00 0. 667 0 .278 3 1/18/06 21:OQ 0. 160 6 2 . 00 0.500 0.235 5 11/24/06 4:00 0. 099 7 1.30 0.231 0 .464 1 1/09/08 9: 00 0 . 01fl 8 1.10 0.091 Computed Peaks 0 .430 50.00 0.980 I Flow Frequency Analysis Time Series File:11706b1vl3dev. tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS} Period 1.26 6 2/09/01 2:00 2 .49 1 100. 00 0 .990 1. 08 8 1/05/02 16: 00 1 .80 2 25. 00 0 .960 1.52 3 12/a8/02 18:OQ 1.52 3 10.00 0 .900 1.24 7 8/26/04 2 : 00 1 .�7 4 5.00 0 .800 1.47 4 10/28/04 16: �0 7.. 35 5 3 .00 0 .667 1.35 5 1/18/06 16: �0 1 .2.6 6 2.00 0 .500 1. 80 2 10/26!06 0: 00 1.24 7 1. 30 0.231 2 .49 1 1/09/08 6: 00 1 .08 8 1.10 0.091 Computed Peaks 2 .26 50.00 0.980 Flow Frequency Analysis Time Series File:11706b1v13rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft} Period 0.285 2 2/�9/01 20:00 0.295 5. 43 1 100.00 0 .990 �.073 6 1/a7/02 4:00 0.285 5 . 38 2 25 .00 0.960 0.210 3 3/06/03 22:00 0.210 4. 84 3 10.00 0 .900 0.060 8 8/26/04 8:00 0.196 4 . 59 4 5.00 0 . 800 0.071 7 1/08/05 5:00 0.128 3.75 5 3 .00 0 . 667 0.128 5 1/19/06 0:00 0.073 3 . 51 6 2 .00 0 . 500 0 .196 4 11/24/06 8:00 O.Q71 3 . 43 7 1 .30 0.231 0.295 1 1/�9/08 15:00 0.060 2 .46 8 1.10 0 . 091 Computed Peaks Q.292 5. 41 50. Od 0. 980 Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 2 . 00 H:1V � Pond Bottom Length: 230. 00 ft Pond Bottom Width: 65. 00 ft Pond Bottom Area: 14950. sq. ft Top Area at 1 ft. FB: 23296. sq. ft 0. 535 acres Effective Storage Depth: 5. 50 ft Stage 0 Elevation: 101 . 50 ft Storage Volume: 1 00960. cu. ft �„_�e�f1T'On Vd umc 2 . 318 ac-ft r q ! Riser Head: 5. 50 ft e{ �'Y{!/' - Riser Diameter: =8 . 00 inches Number of orifices: 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0 .00 1 .19 0. 090 2 3 .50 2 .00 0.153 4 .0 Top Notch Weir: Rectangular Length: 1. 00 in Weir Height: 4. 95 ft Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation Surf Area (ft) (ft) (cu. ft) (ac-ft) (cfs) {cfs) (sq. ft) 0. 00 101.50 0. 0.000 0.000 0 .00 14950. 0. 01 101.51 150. 0.003 0.004 0 .00 14962 . 0 . 02 101 .52 299. 0 .�07 O.00b 0.00 14974. 0. 04 101.54 599. 0 .014 0 .007 0.00 14997 . 0.05 101 . 55 749. 0 .017 0.009 0.00 15009 . 0. 06 101 . 56 899. 0 .021 a.o1a 0.00 15021 . 0. 07 101 .57 1049. 0 .024 0.010 0.00 15033 . 0. 09 1�1.59 1350. 0 .031 0 .011 0.00 15056. 0 .10 101 . 60 1501. 0 .034 0.012 0 .00 15068. 0. 21 101 .71 3166. 0 .073 0 .017 0 .00 15199 . 0. 31 101 . 81 4692. 0 . 108 0.022 0 .00 15317 . 0. 42 101 . 92 6384. 0 .147 0 . 025 0 .00 15448. 0. 53 102 .03 8090. 0 .186 0 . 028 0 .00 15580 . 0. 64 102 .14 9811. 0.225 0.031 0.00 15712 . 0 . 75 102 .25 11547 . 0 .265 0.033 0.00 15844. 0 . 85 102 .35 13137 . 0 .302 0.035 0.00 15965. 0 . 96 102 .46 14900. 0 .342 0 .038 0.00 16098. 1 . 07 102 .57 16679. 0 .383 0 .040 0.00 16231 . 1 . 18 102 . 68 18471. 0.424 Q. 042 0.00 16365. 1 .29 102 .79 20279. 0 .466 0 . 044 0.00 16499 . ' 1 . 39 102 .89 21935. 0 .504 0.045 0.00 16621 . ', 1 . 5Q 1Q3 .OQ 23771. 0 . 546 0. 047 0.00 16756 . � 1 . 61 103 .11 25621. 0 . 588 0. 049 0. 00 16891 . 1.72 103 .22 27487. 0. 631 0.050 0.00 17027 . 1 . 82 103 .32 29195. 0. 670 0.052 0.00 17151 . 1 .93 103 .43 31090. 0.714 0.053 0.00 17287 . 2 .04 103 .54 32999. 0 .758 0.055 0.00 17424. 2 .15 103 .65 34923. 0.802 0 . 056 0.00 17561 . 2 .26 103 .76 36862. 0.846 0. 058 0.00 17699 . 2 .36 103 .86 38638. 0.887 0.059 0.00 17824 . 2 .47 103 .97 40606. 0.932 0.060 O.QO 17962 . 2 .58 104 .68 42590. 0.978 0.062 0.00 18101. 2 . 69 104.19 44589. 1.024 0 .063 0.00 18240. 2 .80 104.30 46603. 1 .070 0.064 0.00 18379 . 2 .90 104.40 48447. 1 .112 0.065 0.00 1850� 3 .01 104.51 50490. 1 .159 0.067 0.00 1864� 3 . 12 104 .62 52549. 1 .206 0.068 0.00 1878� 3 .23 104.73 54624. 1.254 0.069 0.00 18928 3 . 33 104.83 56523 . 1 .298 O.Q70 0.00 1905� 3 .44 104 .94 58627. 1.346 0.071 0.00 19199 3 . 50 105.00 59781. 1 .372 0.072 0.00 19276 . 3 .52 105 .02 60167. 1.381 0.073 0.00 19302 . 3 .54 105.04 60553. 1.390 0.076 0.00 19328 . 3 .56 105.06 60940. 1 .399 0.080 0.00 19354 . 3 . 58 105.08 61327. 1 .408 0.086 0.00 19379 . 3 . 60 105.10 61715. 1.417 0.093 0.00 19405 . 3 . 62 105.�.2 62104. 1 .426 0. 102 0.00 19431 . 3 . 65 105 .15 62687. 1 .439 0 .111 0.00 1947G . 3 . 67 105 .17 63077. 1 .448 0 .118 0.00 19496 . 3 . 69 105 .19 63467 . 1.457 0.121 0.00 19522 . 3 .80 105 . 30 65622 . 1.506 0.134 0.00 19665 . 3 . 90 105 .40 67595. 1.552 0 .145 0. 00 19795 . 4 .01 105 .51 69781. 1 . 602 0 .154 O. QQ 19939 . 4 .12 105 . 62 71982. 1. 652 0.163 0.00 20083 . 4.23 105 .73 74199. 1.703 0.171 0.00 20228 . 4 .33 105 .83 76228. 1 .750 0.179 0.00 20359 . 4 .44 105.94 78476. 1 .802 0.186 0.00 20505 . 4. 55 106.05 80739. 1 .854 0.193 0.00 20650 . 4. 66 106.16 83019. 1 .906 0.200 0.00 20796 . 4 .77 106.27 85315. 1.959 0.206 0.00 20943 . 4 .87 106.37 87415. 2 .007 0.212 0.00 21076 . 4 .95 106.45 89106. 2.046 0.216 0.00 21183 . 5 .02 106 .52 90592. 2.080 Q.224 0.00 21277 . 5 .09 106 .59 92Q85. 2 .114 0.233 0.00 21371 . 5 . 16 106 .66 93584. 2 .148 a.242 0.00 21465 . 5 .22 106 .72 94874. 2 .178 0.254 0.00 21546. 5 .29 106.79 96386. 2 .213 0.267 0.00 21640. 5 . 36 106.86 97904. 2.248 0 .281 0.00 21734 . 5 .43 1Q6.93 99428. 2 .283 0 .296 O.QO 21829 . 5 . 50 107 . 00 100960. ? . 318 0.311 0.00 21924 . 5 . 60 107 . 10 103159. 2 . 368 0.778 0.00 22060 . 5 .70 10/ .20 105372. 2 .419 1.630 0.00 22196 . 5 . 80 107 .30 107598. 2 .470 2 .730 0.00 22332 . 5 . 90 107 .40 109838. 2 .522 4.020 0.00 22469 . 6 .00 107 .50 112092. 2 .573 5.500 0.00 22606 . 6 . 10 107 .60 114359. 2 .625 6 .930 0.00 22743 . 6 . 20 107 .70 116641. 2 . 678 7 . 450 0.00 22881 . :_! 6.30 107 . 8� 118936. 2 .730 7 .960 0.00 23019. 6.40 107 .90 121245. 2.783 8.420 0.00 23157. 6. 50 108 .00 123567. 2 .837 8. 860 0.00 23296. 6. 60 108.10 125904. 2 .890 9 .280 0.00 23435. 6 .70 108 .20 128254. 2 .944 9 . 680 0.00 23574. 6.80 108 .30 13Q619. 2.999 10. 070 0.00 23714. 6. 90 108 .40 132997. 3.053 10.440 0.00 23854. 7 . 00 108 .50 235389. 3 .108 10.790 0.00 23994. 7 .10 108 .60 137796. 3 .163 11 .140 0.00 24135. 7 .20 108 .70 140216. 3 .219 11 .470 0.00 24275. 7 .30 108 .80 142651. 3 .275 11 .800 0.00 24417. 7 .40 108 .90 145100. 3 .331 12 .120 O.OQ 24558. 7. 50 109 .00 147563. 3 .388 12 .420 0. 00 24700. Hyd Inflow Outflow Peak Storage Target Calc Stage Elev (Cu-Ft} (Ac-Ft) 1 2 .49 0 .46 0.30 5.43 106.93 99332 . 2 .280 2 1.26 ******* 0.29 5.38 106.88 98358. 2 .258 3 1.52 ******* 0.21 4.84 106.34 86697 . 1 .990 • 4 1. 80 ******* 0.20 4.59 106.09 81647 . 1.874 5 1.35 ******* 0.13 3 .75 105.25 64648. 1.484 6 1.08 ******* 0.07 3.51 105.01 60053 . 1.379 7 1.47 ******* 0. 07 3 .43 104.93 58456. 1.342 8 1.24 ******* 0. 06 2.46 103.96 40411. 0.928 ---------------------------------- Route Time Series through Facility Inflow Time Series File:11706b1v13dev. tsf Outflow Time Series File:11706b1vl3rdout Inflow/Outflow Analysis Peak Inflow Discharge: 2 . 49 CFS at 5 : 00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.295 CFS at 15 : 00 on Jan 9 in Year 8 Peak Reservoir Stage: 5.43 Ft Peak Reservoir Elev: 106.93 Ft Peak Reservoir Storage: 99332. Cu-Ft . 2 .280 Ac-Ft Flow Frequency Analysis Time Series File:11706b1vl3rdout. tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS} (CFS} (ft) Period 0 .285 2 2/09/01 2�:OQ 0.295 5.43 1 100. 00 0.990 0.073 6 1/07/02 4:00 0.285 5. 38 2 25.00 0.960 0.210 3 3/06/03 22:00 0.210 4. 84 3 10.00 0.900 0.060 8 8/26/04 8:00 0.196 4 .59 4 5 .00 0.800 0.071 7 1/08/05 5:00 �.128 3 .75 5 3.00 0.667 0.128 5 1/19/06 0:00 0.073 3 . 51 6 2 . 00 Q.500 0.196 4 11/24/06 8:00 0.071 3 .43 7 1 .30 Q.231 �.295 1 1/09/OS 15:00 0.060 2 .46 8 1 .10 0.091 Computed Peaks 0. 292 5 . 41 50.00 0.980 Flow Duration from Time Series File:11706b1vl3rdout.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS � $ � 0 .004 24387 39 .770 39.770 60.230 0. 602E+00 0.012 6111 9 .966 49.736 50.264 0.503E+00 0.020 5785 9.434 59.170 40.830 0.408E+00 0.028 5893 9.610 68.780 31.220 0.312E+00 0.036 5536 9 .028 77 .808 22 .192 0.222E+00 0.044 4527 7 . 383 85.191 14.809 0.148E+00 0.052 3521 5 .742 90.933 9.067 0.907E-01 0.060 2382 3 .885 94.817 5.183 0.518E-01 0.068 1927 3 .143 97 .960 2 .040 0.204E-01 0 .076 778 1.269 99.229 0.771 0.771E-02 0.084 39 0.064 99.292 0.708 0.708E-02 d.092 33 0 .054 99.346 0. 654 0. 654E-02 0 . 100 18 0.029 99.375 0. 625 0. 625E-02 0 .108 23 0.038 99.413 0.587 0.587E-02 0 .116 21 0.034 99.447 0.553 0.553E-02 0 .124 28 0.046 99.493 0.507 0. 507E-02 0 .132 54 0.088 99.581 0.419 0.419E-02 0 . 140 50 0.082 99.662 0.338 0.338E-02 0 . 148 35 0.057 99.720 0.280 0.280E-02 0 .156 22 0.036 99.755 0 .245 0.245E-02 0 .164 14 0.023 99.778 0 .222 0.222E-02 0 .172 16 0.026 99.804 0.196 0.196E-02 0 .180 14 0.023 99.827 0.173 0.173E-02 0 .188 21 0.034 99.861 0.139 0.139E-02 0 .196 19 0.031 99.892 0.108 0. 108E-02 0 .204 16 0.026 99.918 0 .082 0. 815E-03 0 .212 15 0.024 99.943 0 .057 0.571E-03 0 .220 9 0.015 99.958 0 .042 0.424E-03 0 .228 6 0.010 99.967 0.033 0.326E-03 0 .236 6 0.010 99.977 0.023 0.228E-03 0 .244 2 0.003 99.980 0 .020 0.196E-03 0 .252 2 0.003 99.984 0 .016 0.163E-03 0 .260 2 0.003 99.987 0 .013 0.130E-03 0 .268 2 0.003 99.990 0. 010 0. 978E-04 0 .276 1 0.002 99.992 0. 008 0.815E-04 0 .284 3 0.005 99.997 0. 003 0.326E-04 Duration Comparison Anaylsis Base File: 11706b1vl3pre.tsf New File: 11706b1v13rdout.tsf Cutoff Units: Discharge in CFS -----Fraction of Time----- ---------Check of Tolerance------- Cutoff Base New �Change Probability Base New �Change 0 .080 � 0. 95E-02 0.73E-02 -23 .0 � 0.95E-02 0.080 0 .071 -10 .2 0 .101 � 0. 63E-02 0. 62E-02 -1 .3 � 0 . 63E-02 0.101 0.099 -2 .7 0 .123 � 0.49E-02 0.52E-02 4.3 � 0 .49E-02 0.123 0.126 2 .0 � 0 .145 � 0. 37E-02 0.30E-02 -18. 5 � 0 .37E-02 0.145 0.137 -5 .4 0 .167 � 0.29E-02 0.22E-02 -25.0 � 0.29E-02 0.167 0.147 -12 . 0 0 .188 � 0.22E-02 0.14E-02 -37 .0 � 0.22E-02 0.188 0.165 -12 .5 0 .210 � 0. 15E-02 0.62E-03 -58.2 � 0 .15E-02 0.210 0.186 -11 .5 0 .232 I O. 10E-02 0.26E-03 -74.2 � 0.10E-02 0 .232 0. '198 -14 . 5 0 .254 � 0. 62E-03 0.16E-03 -'73 .7 � 0. 62E-03 0.254 0.210 -17 .2 0.275 � 0.34E-03 0.82E-04 -76.2 � 0.34E-Q3 0.275 0 .226 -18.0 0.297 � 0.21E-03 O.00E+00 -100.0 � 0.21E-03 0 .297 0.241 -19.0 0.319 � 0.16E-03 O.00E+00 -100. 0 � 0.16E-03 0 .319 0.254 -20. 5 0.341 � 0.98E-04 O.00E+00 -100. 0 � 0.98E-04 0.341 0.271 -20.4 0.362 � 0.16E-04 O.OQE+00 -100. 0 � 0.16E-04 0.362 0.285 -21.3 Maximum positive excursion = 0.005 cfs ( 4.7�) occurring at Q.116 cfs on the Base Data:11706b1vl3pre. tsf and at Q.121 cfs on the New Data:11706b1vl3rdout.tsf Maximum negative excursion = 0.077 cfs (-22.8�) occurring at 0.337 cfs on the Base Data: 11706b1vl3pre.tsf and at 0.260 cfs on the New Data:11706b1vl3rdout.tsf rlow Duration from Time Series File:11706b1vl3pre. tsf Cutoff Count Frequency CDF Exceedence_Probability CFS � � $ 0.080 60747 99 .066 99.066 0 .934 0. 934E-02 0.090 108 0.176 99.242 0 .758 0.758E-02 0. 10Q 73 0.119 99.361 0.639 0. 639E-02 0.110 41 0.067 99 .428 0.572 0.572E-02 0.120 37 0.060 99.488 0.512 0.512E-02 0.130 38 0.062 99.550 0.450 0 .450E-02 0 .140 36 0.059 99 .609 0.391 0 .391E-02 0.150 28 0.046 99 .654 0.346 0.346E-02 0.160 23 0.038 99 . 692 0.308 0.3Q8E-02 0.170 22 0.036 99.728 0.272 0.272E-02 0.180 15 0.024 99 .752 0.248 0.248E-02 0.190 19 0 .031 99.783 0.217 0.217E-02 0.200 24 0 .039 99 .822 0.178 0. 178E-02 0.210 18 0 .029 99.852 0 .148 0.148E-02 0.220 12 0 .020 99 .871 0 .129 0.129E-02 0.230 16 0.026 99. 897 0 .103 0. 103E-02 0.240 12 0.020 99. 917 0 .083 0. 832E-03 0.250 10 0.016 99 . 933 0 .067 0. 669E-03 0 .260 9 0.015 99 .948 0.052 0.522E-03 0.270 8 0.013 99 .961 0 .039 0.391E-03 0.280 6 0.010 99 .971 0.029 0.294E-03 0.290 2 0.003 99 .974 0.026 0.261E-03 0.300 3 0 .005 99 . 979 0.021 0.212E-03 0 .310 2 0.003 99 .982 0.018 0.179E-03 0 .320 1 0.002 99 .984 0.016 0.163E-03 0 .330 1 0.002 99 .985 0.015 d.147E-03 0.340 2 0.003 99 .989 O.d11 0.114E-03 0.350 3 0.005 99 .993 0.007 0.652E-04 0.360 3 0.005 99 .998 0 .002 0.163E-04 0.370 1 0.002 100.000 0.000 O.O00E+00 I, 0.380 0 0.000 100 .000 0.000 O.O00E+00 ' 0.390 0 0.000 100.000 0.000 O.O00E+00 0.400 0 0.000 100.000 0.000 O.O00E+00 0.410 0 0.000 100.000 0.000 O.O00E+00 �.420 0 0 .000 100.000 0.000 O. O00E+00 �. 43C 0 0 .000 100 . Q00 0. 000 O . O00E+00 Flow Duration from Time Series File:11706b1v13rdout. tsf Cutoff Count Frequency CDF Exceedence_Probability CFS � � � 0.004 24387 39.770 39.770 60.230 0. 602E+00 0.012 6111 9.966 49.736 50.264 0.503E+00 0.020 5785 9.434 59 .170 40.830 0.408E+d0 0.028 5893 9 .610 68 .780 31 .220 0.312E+00 0.036 5536 9.028 77 .808 22 .192 0.222E+00 0.044 4527 7.383 85 .191 14 .809 0.148E+00 0 . 052 3521 5.742 90 .933 9.067 0.907E-01 0.060 2382 3 .885 94 .817 5.183 0.518E-01 0.068 1927 3 .143 97 .960 2 .040 0.204E-01 0.076 778 1.269 99 .229 0 .771 0.771E-02 0.084 39 0.064 99.292 0.708 0.708E-02 0.092 33 0.054 99.346 0.654 0.654E-02 0.100 18 0.029 99.375 0. 625 0. 625E-02 0.108 23 0.038 99 .413 0.587 0.587E-02 0 .116 21 0.034 99 .447 0.553 0. 553E-02 0.124 28 0.046 99 .493 0.507 0.507E-02 0 .132 54 0.088 99 .581 0.419 0.419E-02 0 .140 50 0.082 99 . 662 0.338 0. 338E-02 0.148 35 0.057 99 .720 0 .280 0.280E-02 0. 156 22 a.036 99 .755 0.245 0.245E-02 0.164 14 0.023 99 .778 0.222 0.222E-02 0.172 16 0 .026 99 .804 0.196 0. 196E-02 0.180 14 0.023 99.827 0.173 0.173E-02 0.188 21 0.034 99.861 0.139 0.139E-02 , 0.196 19 0.031 99 .892 0.108 0.108E-02 I 0.204 16 0.026 99 .918 0.082 0.815E-03 0.212 15 0_024 99 .943 0.057 0_571E-03 0 .220 9 0.015 99 .958 0.042 0.424E-03 0 .228 6 0 .010 99 .967 0.033 0.326E-03 0 .236 6 0.010 99 .977 0.023 0.228E-03 0 .244 2 0.003 99 . 980 0.020 0.196E-03 0.252 2 0.003 99 .984 0.016 4.163E-03 0 .260 2 0.003 99.987 0.013 0.130E-03 0 .268 2 0.003 99 .990 0.010 0. 978E-04 0 .276 1 0.002 99 .992 0.008 0. 815E-04 0 .284 3 0.005 99 .997 0.003 0.326E-04 ` 1 Duration Comparison Anaylsis Base File: 11706b1vl3pre.tsf New File: 11706b1vl3rdout.tsf Cutoff Units : Discharge in CFS -----Fraction af Time----- ---------Check of Tolerance------- Cutoff Base New �Change Probability Base New �Change 0 . 080 ( 0.95E-02 0.73E-02 -23 .0 � 0.95E-02 0.08� 0.071 -10 .2 0.101 ' 0. 63E-02 0.62E-02 -1 .3 ( 0.63E-02 0.101 0 .099 -2 .7 0.123 � 0.49E-02 0.52E-02 4 .3 � 0.49E-02 0.123 0 .126 2 .0 _ 0_145 � 0. 37E-02 0.30E-02 -18 .5 � 0.37E-02 0 .145 0 .137 -5.4 0.167 � 0.29E-02 0.22E-02 -25 . 0 � 0.29E-02 0.167 0 .147 -12 .0 , 0.188 � 0.22E-02 0.14E-42 -37 .0 � 0.22E-02 0.188 0 . 165 -12 .5 0.210 � 0 .15E-02 0.62E-43 -58 .2 � 0.15E-02 0.21Q 0 .186 -11.5 0.232 � 0 .1QE-02 0.26E-03 -74.2 � 0.10E-02 0.232 0 .198 -14.5 0 .254 � 0 . 62E-03 0.16E-03 -73 .7 � 0.62E-03 0.254 0 .210 -17 .2 0 .275 � 0 .34E-03 0 .82E-04 -76.2 � 0.34E-03 0.275 0 .226 -18.4 0 .297 � 0.21E-03 O.00E+00 -100 .0 � 0 .21E-03 0.297 0 .241 -19 .0 0.319 � 0.16E-03 O.00E+00 -100 .0 � 0.16E-03 0.319 0 .254 -20 .5 0.341 � 0.98E-04 O.0�E+00 -100 .0 � �.98E-04 0.341 0.271 -20.4 0 .362 � 0.15E-04 O.00E+00 -100 .0 � a.16E-04 0.362 0.285 -21 .3 Maximum positive excursion = 0.005 cfs ( 4.7�) occurring at 0 .116 cfs on the Base Data: 11706b1vl3pre.tsf and at 0 . 121 cfs on the New Data:11706b1vl3rdout. tsf Maximum negative excursion = 0.077 cfs (-22 . 8�) occurring at 0.337 cfs on the Base Data: 11706b1v13pre.tsf and at 0 .260 cfs on the New Data:11706b1vl3rdout. tsf SBUH POND SIZING CALCULATIONS FOR THE EXISTING SITE i , I ' � vbt, S�� D� P�c�s¢�✓. -� �j / i Appended on: 14:31:21 Wednesday,June 25, 2008 ��.J �t�� 5 o� �,`., �•, �, .•t��� LPOOGCOMPUTE [initial pond] SUMMARY using Puis P��F'��`"� `- / �i � Start of live storage: 101.5000 ft , _- --- ---- --- -----; ----- --�------- , i Event �Match Q (cfs)f Peak Q (cfs}jPeak Stg(ft} Vol (cfj (Vol (acft) Time to Empty -- ; _ _ _ � --- _ . _ _ _-- � ------ --------------__--- ( , ' 2 year ; 0.7295 , 0.7285 j 105.2606 ;28858.93 � 0.6625 � 54.SQ , --- ----_ ----- --- ------------------------- --- — --, t 0 year( 1.7236 ; i.7229 106.6902 142483.52 ( 0.9753 � 56.83 _ --=-- _ __ - -- -------------- --- ____ __ ---_--- -- -----------) � _ --- -..------- ---_ _ ___--------___-___ �_-------__ _______�____._______ -_-._. I � 2�ear Hydrograph Plot � i ; , , , , , � , ; . � ; : : ' � : : : ' ; , � . � � �: f� ��,7osdev� � , , , . , , . • , , , , . , . , � , . ; . .; _ __, _: ., : _ . . _ . ,_ . ,._� ..-� ;-- • - r ����: I ' c�i t : , . ' ; ' , : , : � , , . , . _�' � .� ', ' , . �� o : . : , , � , , , � � . . , . } . . , . . , I � p , _ , , , � O F`- O M t�. O M t� O M t�. O f*i t� Q (`i M1 O t`7 t� O l`7 1.� O i`"1 t� O f•1 h- O (`') � O � �fi 6] Ui GO Vi OD c- U'i CO c- U'? QD Vi OD 4i 0� �ft CO �- Vi 9O 47 a0 .- � tV M cf rD t�- 00 O (V 7 �fi �D �70 Rl O N 1�'i 7 �D t�- N O N T � (D 0� iTi O � ' � r r e- � e- s- N N N N ti^i N CJ M M M M C? i'7 (`7 M �t II T'pne in HOurs __ __ _ _ _--- —_. I!I � 10 yeac Hydrograph Plot , , __ , -- 3 i - ; - ; ;. _ ;_ , _,. ; ' --, _ r., �15 TOodEv � !< < : . --- ,- , , , .- - ; - - +�•�1 U year�d- � _ i � 2 , ; , . , ; ; ; � ' ' , . , . ' ' : � . � '—�� � ; ; : ' ; . . -- ,__ _. . ,' � � � ; ' , : , ; � 0 . . _ . , '.. 1` O S'"1 t�. O l'i �-- O M t� O M R O f7 t� O M 1� O ('7 l� p M P- O i'') h. O M t� O � � �D � {'�, �4 O Oi (L Q P'T fD Q M tD O P7 (a O (? �D O M fD O M (D O �"'1 CO O D7 fD C? j O CV M �t fD tti OD O — CY v 47 tD � Q1 O N M v [D t� 0] O � N v 4� GJ � T v i'�+ ,_ -. r � s- e- e- c- � •- (`! N N �.1 �-1 t 1 C7 in n� n� ?} i?� �_� i'? t. � � Time rc�Hour:� Itunning P:1\11000s11117Q611en�ineeringl\stormshed\\iiaitial pond Report.p;m un Wednesday, June 25, 2008 Summary Reporr of aIl Deter�ric�u Yo«d Uata � ' Evcnt Precip (i►�) b month 1.2800 ; :,`��� �, t�_% ��;; 1�(, . 2 year �'2.0000 ; ` � N � � � � __ 1� � J t r� .r--�� � �� ;10 year I2.9000 � .� t25 year �3.4500 I �100 year 13.9000 � BASLISTZ [11706dev] Using [Userl] As [2 year] [11706dev] Using [Userl) As [10 year] [11706pre] Using [Userl] As [2 yearJ [11706dev] Using [Userl] As [2 year] [11706pre] Using [Userl] As [10 year] [11706dev] Using [Userl] As [10 year] LSTEND . _ . ., .. _. __ . .. _ __ . _ _ � ' � Peak Q ; Peak T � Peak Vol (ac- Area + BasinID j Event ; ; Method/Loss�Raintype; � � (cfs) (hrs) � c� ; (ac) ( � � , : , , _ _ �11706dev; 2 year � 1.5802 ' 8.67 1.7230 ; 25.95 � SBUH/SCS � Userl - ---� _ -- - _f __ _ -----�. _...---�--- . .._ _ _- - --. ..i.... .--- -� _ I t �11706dev� ear � 3.0584 � 8.67 , 3.1026 � 25.95 I SBUH/SCS Userl � � ; Y i � � € � � ___ ____ _. ._ __ _ _ _. ..._ ..._ _ _ _ _ _ ;11706pre � 2 yeaz ( 0.7295 � 12.83 ; 0.9575 E 25.95 SBUH/SCS Userl 1 ; _ ___. _� -- ..__ --- _- -- -- - _. _ _.___ - - - -� '1 l 706dev� 2 year j 1.5802 i 8 67 � 1.7230 [ 25.95 � SBUH/SCS � Userl � k_ . { 10 ; -- . __ _�._ _ _. _ - - -_ __._ _(__ _ .�-- --._ - -� - -�� �11706pre � 1 1.7236 � 10.83 � 2.1493 , 25.95 � SBUH/SCS ; Userl , � year � � ; _ ._.. ._; _ _--- -� - - -... . _ . . . . . .---' _ - -- - _ ._ _ .._.. _ � � --�,�-�- I ;11706dev': i a � 3.0584 8.67 ' 3.1026 � 25.95 � SBUH/SCS � Userl � � ; year � ; , i ' i ! ' � BASLIST [Userl J AS [2 year] DETAILED [11706dev] [11706pre] LSTEND Record Id: 11706dev . . ._ .. _ _ _ . .._-�-- �- - - -� -� �---_ .. ___ . .____ .�--�- - -- ___----- "Design Method � SBUH �Rainfall type r Userl � _ _. . .. _._ _. ._ _ _ _ -- - ;Hyd Intv ; 10.00 min iPeaking Factor � 484.00 , . --- --� -- - ---. ._.._ - ---- . .; .____ .._._.. _ ___-----, - ---- _____.__.. . i t ;Abstraction Coeff j 0.20 t ; _ . _. . -- -----.. ._ -�---- - - --- - -�-:_._ _. ._ .--- _ __ - -- --- -- _ _-_ ----__. _ ; !Pervious Area � 18.77 ac ;DCIA � 7.18 ac I :_ . ._ . _ _ _ . _ _.. ._..___ . . _ .._ ___ ..---_ .. ..__. _ ._ .�__-- -.. ____.�_.. _ _..- - -- - : ;Pervious CN ( 76.27 ;DC CN � 98.00 � _ . _ _... ..._ _. ___ _ ... - . ... . . __._ . . ..--- -____ _._ _ .. __ ., Pervious TC � 118.40 min jDC TC � 118.40 min ; ._ _. _ _ - - .- .--- -- . __ - - -___._ _._ . .. ..___ _ _ ... ._.. .____ ._ . ____.._.___. _--_._, , ---�-------_...._..____ ._-�--- __�------. _._ _�.-- --------- _.__--- _.---------- - -� ;t -- .... . :. �� Pervious CN Calc ', _ _._ _. _. .. _ __... _. ._... _____ _ ____ .--- _ .___.__. _.__ .__ _.- --- . _._ _. .__ . _..--� �' Description ( SubArea I Sub cn j� �; - - - _ ___._ - - �--- - - - ___ . ._.__ __ _. _ ..-�� - ----- - - - -- - - � . . __... '� Open spaces, lawns,parks (>75% grass) � 1.27 ac r 80.00 � ;!. _ _ ._------- - -- - - --- __ _ --�--- _.._. .__ ______. _ ..._ ____ -.- --. -- - ---- -- _... __._ _._.---- � _ ._ _ _--.--- ._-- -- _ _.. ___._�. _ _ _. _ �__ ._ � ___ . . _. _ _ : - - - .._ _ _ _ ._. __. _.._ _ .._. _ . � Wood/forest land (Undisturbed/2nd grvwth) f 17 50 ac � 76.00 � , . __ _ . . ___ ____.__-- --_ __------ -- ______ ___. --- -- ----------- ..._ __._- - `� Pervious Composited CN (AMC 2) � 76.27 �i � . ---- - __. _ _.__--- _ - -- --------�- �- -------- . _ _ . . _ __ _ _ _ .__ _. .-- -----------------------� _. _ __._----- . .._._.�_ �--- � ---- - --_ ._ _. . _. -- ---------�... .__—_____ - ----- ;� Pervious TC Calc f _.__ _. .,_ _ . _ . _ __ . _._.. ._ .._ __. ._. j{ Type � DescripNon � Length � Slope � Coeff � Misc � TT �r._....__ .... ... _"'�. .-.'. -'--�._ . - -. '._.'-'-.-'-"__�- ----•--� - -. . .._. ..._'-'.---.-' "---'------'--'----___._ , iFixed 4 � �118.40 min � _ _ ._ . _. ._. _ ._------. ,__ _ . -- __ __.________.: . __ -- --------.--�, �� Pervious TC � 118.40 min ?! __ . .- ---- _. __ . _ _ _ _ _ . ... - - -- _.---. . .. _ ._ _ __.__.._. ... _ �__ . �_ - --- --__.� _ _..�----- - _. ..__._ . __. . .___ ._�i � 'i . ` Directly Connected CN Calc i:- --._ _ . ____.._ _.. _ _ � --..- -----....__.�_._. _ _ --- :. - --- � -- �---- - - - !' Descri tion ` Sub cn i i?._.. . P _ _ _---__..__�__.SubArea _--:--------- --!� .- _--- _.___....__� ___.__.__._._ _.—.___._ . _ E' Impernous surfaces (pavements, roofs, etc) 7.18 ac � 98.00 i . � � _.. _.._.__ _._. . _ __ . _. ___.. . � ,,_._ . ._ _. ._ ._.. ___. __.----- .__._... ±! DC Composrted CN (AMC 2) 98.00 � ;. ,.- --- -- ._ _ _ --- -- . - -------- --- _ -- - � -----. _______ __ ._---.. _. . _ ._ _____,__ __� ___ . � -- --- --- - --- _ _ _ . _ _ _ _. _ __ _._. i ' � Directl Connected TC Calc ; Y __ - ,- -- -- __ __ . . - -- -_ ------- --- ---- --- ,—. �_. _ _.. _ ----- ;� Type ; Description � Length � Slope � Coeff � Misc j TT � .... _ _ __. _. _ . ._ . _ -� --- - _ __.._. _ _ - -_ . ___ ---i� ;�Fixed � j �118.40 min : . _ _ _.___ . _ . _.. _.. _._... _. . ____ ____ . . __ __� .__._ _.. _.. _ _ , �j Directly Connected TC � 118.40min ;� , . - --_ ._. ---_ ___--�__ __. __ ._ _ _ ..--- ___ ----- -_._ ._ _.._. . _ _ . .__--- -� - .�; Record Id: 11706pre _ _ _ _ - _ _. , _ ; �Design Method i SBUH Rainfall type ! Userl � ;_ .------� -- --- ------____... . , ---.._.. ._._-�--__. _ __.... ------------ -_.___.. _.�__..-- - _. --` � ____.._._ _. _. "Hyd Intv j 10.00 min �Peaking Factor � 484.00 . .. ., _ . __ ._ . - - - _ _ . - - -- - - -:-- -�-_.___ __ . ._� � iAbstraction Coeff ; 0.20 � - - - � . . . _. ._._ ... _._ . - _ _-___..__...__ �,.__- - -------�--- - .,-, 'Pervious Area j 25.95 ac JDCIA ; 0.00 ac . _ .. : _ _.. . - - _ _- -� - -�- �� --- - __ . ; Pcrvious CN ; 76.85 �DC CN i 0.00 ; ,_ - ---_ . _ . . ._� __ �- -�-- - -_ . .. ___._. ---- � -- - - -. .� ;Pervious TC � 122.70 min iDC TC � 0.00 min ; . ,. ._. ___ . _._ _._. . --- -------__- -- -- . __ ---___..._ ._ __ _.___ __ __ _. __.___� , .. _. _ _ ._ _ _ _ _ ____---- -_ _.__ ._. _ ___ _ _. _. ___ �. _ _._ . � Pervious CN Calc � ;� . . .- - -... --. _ . _.__ ----- --- - --- . .., _ _._ _.. _- - - -I' _ _ . _� Descriphon i SubArea � Sub cn � �! . ._ _ ___ _.__ ___ . _ _.. . _ _ . _ _ -- _ .. t� Wood/forest land (Undisturbed/2nd growth) 17.50 ac i 76 00 � _ _ __ _. . __. _ _ . _ _,- _ - - _ _ _ _ __..__ . _. __... ._ -- -- - '� Pasture or range (good) 8.45 ac � 78.60 � ; --_ ._------- --��--- ---� __ _ _-- --- ..__ _._� ._.__.�- ------ ----- - � Pervious Composited CN (AMC 2) I 76.85 � . . _ _ -- - . _ _- -__ - - _---- _ _ _ __. . ._.._._- - _-- -. _ __ .. -- ---- - --�-------- -----�----- -�- ----- �� Pervious TC Calc . � - _ �� Type ; Descripdon � Length j Slope j Coeff � Misc � T"T I _ _ _ _. .. -- �- - __. _. __ ..... --- � - - --- - - _- ___.__..--- -- - - --.._ ._ . _ . _� ;jFixed ; j �1 . 22 70 min _._.- --- -- _ _. _--_ - -- - .----- ._ _ __._ ..__- - ....E) . .. . _. _ - - -- - - -- --._-- - - . �; Pervious TC � 122.70 min " �.�. _._ __.. .....____ .. - - -� -- ___....._.. _--- � .__ _ _ ---- -� - -- --. ._ _.....__ _ _:� HYDLIST SUMMARY [2 year out] [10 year out] LSTEND , , __ _ _ . __ __ � HydID �Peak Q {cfs)iPeak T (hrs);Peak Vol (ac-ft} jCont Area (ac) ;_ .._ . __ . __r___. ... _ __._ -' - -----._ ._ . . ---._ . _.____..i - _ - - ___ ;2 year out ; 0.7285 I 24.33 � 1.7230 C 25.9500 . . _..,.. . ___- ---�-,- ---__�_ . _. . .------�---._. - -�--r-____.., _. ..__ � _ ;10 year out� 1.7229 ! �16.50 ,� 3.102b _ ; _25 9500 ^ � STORLIST [initial trap] LSTEND Record ld: initial trap . . _ _.., . _.. Descrip: :initial trap =lncrement ;0.10 ft ' . _ ._ ... ;_. __.__. ; __ .. __ _.. � �Start El. �101.5000 ft;Max El. �107.0000 ft� �Length ;145.0000 ft'Width �44.0000 ft I � _ __.__. �..__ __ _ . ._---- ;. , .____._ �._ ' SLength ssl }O.00v:lh �Length ss2 �2.00OOv:Ih -- _ . . __ . _ _.. _ __ iWidth ssl �2.00v:lh �Width ss2 �2.00OOv:Ih DISCHLIST ', [11706combo] ' LS'1'END I Record Id: 11706combo ..: . .�_,__ __ _ __ __ . __.. . .. __. _ _ �Descnp. !11706 combo iIncrement 10.10 ft ; . , --- -._ . __.� _____ _ __ _ _. :Start El. i 10].5000 ft �Max EL �108.0000 ft� _ __ _, � ;List of Discharge Structures: �11706 orifices ' , ;11706 riser Record Id: 11706 orifices , _.— . _ ., ._ _. _ - ,.- ----- - __..___... . __ .__. .. �Descrip: ;11706 orifices�Increment �0.10 ft ; � • ; �Start El. �101.5000 ft iMax El. �108.0000 ft{ _-- ... _..._.._ ., __._-- - _. ._ ... ._._ _.___..-----�-____. ._._._._..� :Orif Coeff ;0.62 �Lowest Orif El. �99.50 � _ .. __ . . _._----- -- -__. . . . , ..____---- - ;Lowest Diam�3.7207 in Dist to next !3.8700 ft � _. . _.__ _ ---. — - -- - - -----__ _ .. -�-- -__ ._ _ _, .._. _ . ._.` . _ _.�__._ _ ..- - jD2 �5 2734 in ;Dist to next 'O.OQ00 ft � ; ____ ._. . ..____�___._. _ ._. _.. .. .° ---�-----------------._-�----� Record Id: 11706 riser _ .. . .; �-- ___.. __... __ _ . . . . ; �Descrip: �11706 riser �Increment j0.10 ft � ;Start El. �106.7500 ft Max El. �108.0000 ft� i � . ._.._.__ __' --- !Riser Diam J � �18.00 in � � _ .. __. _ ;Weir Coeff'9.7390 �Orif Coeff�3.7820 Licensed to: Barghausen Engineers � i1 � , �_ _ '4 �� , ;� �� � Appended on: 14:31:55 Wednesday,June 25, 2008 Record Id: initial trap _ �_ _ ---_ ---- - iDescrip: �initial trap (ncrement I0.10 ft � �Start El. �101.5000 ft�Max El. i 107.0000 i�� _ _ _ __ ...__ _ . _� �Length �145.0000 ft�Width �44.0000 ft �i ;--------._ _ -----_ ---- --. _ _ � ;Length ss 1 r0.00v:1 h rLength ss2+2.00OOv:1 h � ---___..._.�. __ ._ __ .. ----�---- - 'Width ssl �2.00v:lh �Width ss2 ;2.00OOv:Ih � _ _ _ . __ -- - � -- -- - -- - - , Stage Storage Rating Curve j . , . _.. .. _ _ _ __.. __. _ _ _ _ ._ _. _. _ 101.5000 ft: 0.0000 cf ;104.3040 ft�20541.0987 cf; �101.6000 ft; 641.3427 cf '104.4000 ft i21375.9773 cf� � __ _ _. . _ _ __ _ ; ;101.7000 ft� 1289.3813 cf I 104.5000 ft�22218.0000 cf; 101.8000 ft j 1944.1320 cf �104.6000 ft I230b7.1827 cf' , _ _ - __.. _.. ; ;I01.9000 ft) 2605.6107 cf (104.7000 ft 23923.5413 cf' 102.0000 ft� 3273 8333 cf j 104 8000 ft�24787.0920 cf I �102.1000 ft! 3948.8160 cf i 104.9000 ft i25657.8507 cf� - -- _ . _. ------ . _.. ..-- � 102.2000 ft� 4630.5747 cf �105.0000 ft 26535.8333 cf:. - _._ _ ____ --`-- - .._....__... --- __.. . i 102.3000 ft j 5319.1253 cf �105.1000 ft I27421.0560 cf i '102.4000 ft� 6014.4840 cf �105.2000 ft 28313.5347 cf -- -I-____---- _ _ . --- -- -.�_ ---.._..... . ----------I �102.5000 ft( 6716.6667 cf �105.3000 ft 29213.2853 cf� '102.6000 ft� 7425.6893 cf I 105.4000 ft�30120.3240 cf; '102.7000 ft j 8141.5680 cf �105.5000 ft j31034.6667 cf' :102.8000 ft 8864.3187 cf i105.6000 ft�31956.3293 cf' _ _ --._ . ._ _. _ . _ _ _ '102.9000 ft� 9593.9573 cf :105.7000 ft 132885.3280 cf _. _ .... .. ., _ _ ;_.. ---- `103.0000 ft�10330.5000 cf�105.8000 ft�33821.6787 cf _ .----- _ _ . . __ _ �103.1000 ft�11073.9627 cf i105.9000 ft�34765.3973 cf � _ � �103.2000 ft 1]824.3613 cf j 106.0000 ft 35716.5000 cf � (- --' --`-- _ __ .. . _ _ . ... _.� _ ;103.3000 ft�12581.7120 cf�106.1000 ft�36675.0027 cf� - -.. _ _. _ �103.4000 ft�13346.0307 cf�106.2000 ft�37640.9213 cf� '103.5000 ft i 14117.3333 cf;106.3000 ft�38614.2720 cf 4 ; ; 1 �103.6000 ft�14895.6360 cf�l 06.4000 ft�39595.0707 cf . ; - ----- -- -- - ------- :103.7000 ft;15680.9547 cf:106.5000 f��40583.3333 cf� , ._ . ._... _. . _. _.___ , . . . t 103.8000 ft�16473.3053 cf�106.6000 $i41579.07b0 cf __ _ __ _ ._ . _ _.�.__. _.__ _ . ;103.9000 ft f 17272.7040 cf;106.7000 ft�42582.3147 cf _ .. _ __ _ . ...._._ . .___._._._- -- - _ ..__.._ .�_ ;104.0000 ft(18079.1667 cf(106.8000 ft I43593.0653 cf _. _ , __ . _.__ _ �104.1000 ft�18892.7093 cf'106.9000 ft I44611.3440 cf j 104.2000 ft;19713.3480 cf�107.0000 ft�45637.1667 cf '107.0000 ft j45637.1667 cf Licensed to: Barghausen Engineers Appended on: 14:32:27 Wednesday,June 25, 2008 Itecord Id: 11706combo 'Descrip: �11706 combo l �Increment�0.10 ft � - _ , EStart El. �101.5000 ft �Max EL �108.0000 ft� _ ._. . . _. � �, (11706 orifices List of Discharge Structures: (1170b riser { ' _. __ ...__..---__ __.---. _-- _ __._J Record Id: 11706 orifices :_.___�_ __ __ _.� .--�------. _-- ---_ __--- ......_ ____ __ __, ;Descrip: (11706 orifices �Increment I0.10 ft ' _.. - ---- _ __ �_. - -. ---- ._-- -._.__.___ ._ . 1 iStart El. �101.5000 ft �Max El. i108.0000 ft� •- �-----._ _ ._. ----- ._.�. __ _ _-- -- - __.__^__._---�- _.-- ;Orif Coeff (0.62 �Lowest Orif El. ;99.50 � �Lowest Diam;3.7207 in IDist to next I3.8700 ft � � -'. --. �D2 �5.2734 in ;Dist to next �0.0000 ft ; Itecord ld: 11706 riser tDescrip: j11706 riser IIncrement 0.10 ft ; ' _ _. . _. _ _ _...; ;Start El. �106.7500 ft�Max El. j108.0000 fti ._ - -_ _ _. _ _ jRiser Diam �18.00 in � , --...__---_.__�_ _- -- � - --r--- --� �----:-- - ----- --� �Weir Coeff;9.7390 �Onf Coeff�3_7820 � ' ___ . _____ . _ _ ___ .. . ._. . _ .._ _ _) ; Stage Discharge Rating Curve _ '.._ ._ _ i.._ _..__..+_ __ ....._ ;101.5000 ft�0.0000 cfs'104.8000 ft� 0.6824 cfs ;.... ... . ' ._ _i "_.._.._...._�_�._... ... . . __.._.'r.v_ _'_"..-'.. f 101.6000 ft�0.1188 cfs;104.9000 ft� 0.6927 cfs �-- __...._. . ._._ _ _, . ._ .. _--- -- . �l O l.7000 ft�0.1680 cfs�105.0000 ft�0.7028 cfs I �- - _.. . __._ _s _._. ._. .!_ ._.-----_ ..__ _. . _ _._...� �101.8000 ft�0.2058 cfs;105.1000 ft�0.7128 cfs ; _. _ _ � _ __ . _ � ' ;101.9000 ft;0.2376 cfs;105.2000 ft j�0.7226 cfs = ;102.0000 ft�0.2656 cfs'105.3000 ft; 0.7323 cfs [ �._ . _ -- - - -- _ ;-- - _ _ _i ;102.1000 ft;0.2910 cfs i 105.4000 ft; 0.8726 cfs i .... _ .,_ _ .._ ;---- -.._ __�.__ , _. � ;102.2000 ft�0.3 l 43 cfs;105.5000 ft; 1.0234 cfs i ,. ... . _. - - , �102.3000 ft;0.3360 cfs;105.6000 ft; 1.1226 cfs � `102.4000 ft:0.3564 cfs;105.7000 ft; 1.2034 cfs � . 'i � � - -------- ---____---_�....._. .. . ----- • '102.5000 ft�0.3757 cfs(105.8000 ft r 1.2739 cfs � , . _. �102.6000 ft f 0.3940 cfs y105.9000 ft( 1.3374 cfs �102.7000 ft 10.4115 cfs i 106.0000 ft i 1.3959 cfs � - --_ ....._ _ .. , ;102.8000 ft'0.4283 cfs E 106.1000 ft; 1.4505 cfs ; ; _ . ... __, _ . _ � ;102.9000 ft�0.4445 cfs;106.2000 ft i 1.5020 cfs i - -_.. __.� _ ... .. , .___ __----._� __�_ i 103.0000 ft�0.4601 cfs(106.3000 ft� 1.5508 cfs i _ - . ___.... _. _- -.._ . ._.. ;103.1000 ft�0.4752 cfs�106.4000 ft# 1.5975 cfs �. - �---- .. .__ __.. _. ._..� _ _ __- - ---.._ _ _. :103.2000 ft�0.4898 cfs j 106.5000 ft�1.6422 cfs :_ - --- ------ - -- -- --- ._.._. -----. _____. ___. �103.3000 ft 0.5040 cfs�106.6000 ft� 1.6853 cfs ; �103.4000 ft�0.5178 cfs;106.7000 ft� 1.7270 cfs � _. _. ;._ _ _ _ . �103.5000 ft(0.5313 cfs�106.800U ft`;' 1.9306 cfs � _ _.... _. . ; --. . _ ._. . ; -- - --� ;103.6000 ft�0.5444 cfs!106.900Q ft' 2.6551 cfs ; _ _ . .. _ __ __. _ ;. _... ; . _ _ ._. __.; '103.7000 ft�0.5572 cfs`107.0000 ft F 3.6706 cfs ; . _ _ .._. , ... ; f 103.8000 ft 0.5697 cfs'107.1000 ft� 4.9065 cfs ' ; . _ . _ _ _.--- _ �__ __... ____ ,.. _--- _ _. ;103.9000 ft�0.5820 cfs�107.2000 ft� 6.3276 cfs _ . .__._ _ - --._ _._. �104.0000 ft 0.5940 cfs�107.3000 ft�7.9118 cfs ' ;-- . _ _ . _ _ _._-- ;104.1000 ft i0.6058 cfs 107.4000 ft 1 8.8483 cfs '104.2000 ft I0.6173 cfs I 107.5000 ft j 9.3910 cfs � ' '104.3000 ft i0.6286 cfs�]07.6000 ft; 9.9002 cfs � ' - - , - . _ _ . __. _ _I ;104.4000 ft�0.6398 cfs 107.7000 ft;10.3814 cfs; ;104.5000 ft;0.6507 cfs:107.8000 ft;10.8390 cfs: ;104.6000 ft i0.6614 cfs;107.9000 ft;11.2762 cfs; , -- . . .. _,... .; __ _ __. . . : , 104.7000 ft l0.6720 cfs;108.0000 ft�l 1.6955 cfs; Licensed to: Barghausen Engineers -; i i ,i '; � ( � Appended on: 14:32:54 Wednesday,June 25,2008 11706pre Event Summary ; _ . . _.. _ -- _ ..�_ . . .; ------, ..___.. . . _.-t --- _ �___ _ _.i ; Event �Peak Q (cfs)IPeak T(hrs)€Hyd Vol (acft) (Area (ac)�Method�Raintype� � __ _ ._ i _ .__. _ __ .. ;6 month i 0.2493 � 24.00 � 0.2688 i 25.9500 � SBUH ( Userl _. _ _ _ . _ _ .. _. � 2 year ( 0.7295 � 12.83 � 0.9575 � 25.9500 � SBUH I Userl � r----_ _--- - � ------ ---.. . - - _ ._._----- --- ___ ._---- -- i 10 year � 1.7236 � 10.83 2.1493 25.9500 SBUH Userl ' � ------- � 25 ear.^ 2.5522�____�_._.-8.83`-- r.- .. 2.9918- --^_25.9500 � SBUH Userl � y I � I � �_ ._ _ --.. ..._ . __ � . . _ , _ ,.___.:_ -------.__�_ _ ._. __ __ _ . _.._,_ _. _ -- (100 year� 3.3778 ( 8.83 � 3.7260 I 25.9500 � SBUH ! Userl � Record Id: 11706pre _ . ; - - . _ _,._ _ _ . ___ � - - - - - --t :Design Method ; SBUH (Rainfall type � Userl �.. .. _._. _ ___ . _ _...._._ .. . _ _ .__ ---� . jHyd Inri ; 10.00 min �Peakuig Factor � 484.00 i --- _ _ __ __. . . _..� --- -_ ___ -� --. .-- - -- ---_____. .. _-- f• --- . ._._ - - - -.. i �Abstraction Coeff � 0.20 _ __._ _ .- _ _ .__ __._ __._. .._-- - �- -- -_ -----__ ___......-- - --� ---� -----__ .... . iPervious Area 25.95 ac �DCIA � 0.00 ac _ _ ._ . _ . ___ ._ ._ _ ._ _.._.__ ._. ._ ._ _ ___--- .______ _�_------_._- ---__. .. ._ -,---- �Pervious CN � 76.85 (DC CN j 0.00 __ ___. _ ._ ._ . _ _.. ...._.. .. _ _ __._. ._ .-.-- . _ ,_ - - - ...___ .. ----- ---- _ ------ . ._ _ ._ ;Pervious TC � 122.70 min �DC TC j 0.00 min . _ - --- -_ __.. __. __ .... __ - - ----�. _.__-_---. ____ _._ _ _. _ ..- -- . . _ __ . ,. _ _. _ _ _ _ _ .__ . . ----- - - _ --- _ .. _. _ --- '' Pervious CN Calc ,; � - - - _ ._._. .... - -. _ . . _ -- ----�-- -- - ------- ----.....- -- --- -- ____ Description j SubArea � Sub cn .. _ __ . _ _ _ . _ _.. _. _ ___. __ _-.. --- .____ . ..._.___.__. ,; Wood/forest land (Undisturbed/2nd growth) � l 7.50 ac j 76.00 i -�--- - - -� - -_ - _ _- -- � -- __ . .. _._ -- - -- -_ --�----- � �i Pasture or range(good) � � 8.45 ac � 78.60 f j _ . . __ ... _ . _ . ____ . __.. _ _ _. _ _ _._ .. . ._ _--- - - --- - � - ---!i �� Pervious Composited CN (AMC 2) _ r 76 85 f i _ _ . _. _ _ _�_ - - -- ___ . . .._ _ . __.._ __.__ ,. _ ___._ _ ..._ , _ _ ___ __ . . - --- ... ___ . . Pervious TC Calc �j '� ___ .._ , _ _.. . _ __..,._.__ ..._ _ _ ! - _ _ -,- --- -. _ . . ;--- - -.__ _, -------_ ._. � �; Type ; Description I Length i Slope j Coeff � Misc ; TT �� • �: . . ._ __.._ ___ . _.. .._ __._. _ __..._ . _. _____ ..._.__ .._ _�.... _ _,.. __. ____.____ _...____ , __._ ____. , �iFixed I j i122.70 min i i3. .. . . .. . _ . . . ...__ ..__.......�. . .... ._.... . ...... . .. ..._ .. . . .__ ... .__. . _ __'.., .�"'_ ;� Pervious 1'C � 122 70 min � , _ ._ . _.... ..._ _ . . . _. _ - . _ _ . . _. .____ .... ..___. _.._ __ . __. . . __.. ...------ -- � Licensed to: Barghausen Engineers Appended on: 14:33:19 Wednesday,June 25,2008 11706dev Event Summary . _, ._ _. .__ __. ;__.. ._.___._. .__ _ . �. _ . _ ._ _. _..__ � Event �Peak Q (cfs)jPeak T (hrs) iHyd Vol (acft)IArea (ac)IMethod IRaintype _. _ . ' __._ _ . .. .'__..__ . ._. _- - - - . -- --- - ___ _ =6 month j 0.7854 i 8.33 � 0.8161 � 25.9500 � SBUH Userl _ _.___ ... _._ _ .. _..__._ .. ___._. . .. _ _ . ...--._ . _.' _ _ _. . ; 2 year � 1.5802 8.67 1.7230 � 25.950Q � SBUH Userl : - - --�- __ _ _._--- ------ --_-_ ____._.._..._ ___-- - - ; 10 year � 3.0584 � 8.67 � 3.1026 I 25.9500 � SBUH � Userl --- ------�- - --_._-----f�_._..__._.. -- _ _--- -� _- -- --- ___-.- - ; 25 year I 4.1133 � 8.67 � 4.0306 f 25.9500 SBUH I Userl , _. ----- .__. ..__--____.._... . --�_._____._--. -- -�.--___._.__. ___�_._---- . ;1 QO year� 5.0352 � 8.67 ; 4.8234 25.9500 � SBUH Userl Record Id: 11706dev - - ---- ---. _ .._____ ,.._._ _ --�-----__. _ ----- - -- ---- ---- _. ._- -- ---- Userl-- --_.� ;Design Method ! SBUH �Rainfall type ; " _y _ _.__.. _ . . . .._�_ __. . __. ..._ .._- -�.-- --.. . . . .. . _. ._ ... --- - . ..__.. H d Intv ; 10.00 min �Peaking Factor I 484.00 , __ _ .. .. _......_. .. _ '_" . _... .(_'.._ _,_ - . _.__. __ .._r__�_.'_"_ '..... _._.. _.. .. .. . ._�.._... .__.___ _._� . __� i r 1 ; � ;Abstraction Coeff ! 0.20 _ . .. _ .. . _. ... .--.. ; . __ _ . .. ._ -- - -.... ---- - � _ _ -- _ _ _f__ _ ._ . ;Pervious Area 18.77 ac ;DCIA � 7.18 ac � , _ � .. . 'Pervious CN 76.27 ;DC CN i 98.40 _ , _ : ._ __ _. . ;Pervious TC 118.40 min DC TC � 118.40 min , , . _ . _ . �._-- �- - - _ ._. ._ __...__. . . _ ._, .__- - - .. .. �. _ _ .�__._.__.� Pervious CN Calc !} :;: _. _ _. _ _..--- _ . - - - -- -- -- - -- .. _ , , . ,_ _ ---- _ _- - -- ��, ;� Description � SubArea � Sub cn ;! ,: - --� -- - - -. _. . . --- - --� ---_- .. _ . _.. _. _. ..---- �. .- ------ - _ . _ . ±; Open spaces, lawns,parks (>75% grass) � 1.27 ac I 80.00 _ _ . _- -- - --.- - __ . ____.._ �__ .--. _._. .__.. ...�.__ .._ --- - � � �____.__. .. � Wood/forest land (Undisturbed/2nd growth) � 17.50 ac I 76.00 � �_ ;, _ __ . . _._. _ _..__ _ _. ._ _ __ -- -- -. __ _ .._ _._.--�-- -_ _- - �� Pervious Composited CN(AMC 2} ( 76 27 �� i� .__ _ _ . ------- . __ ._____ _ _________-- _..- -- - _ _ _ _--_ -- . _. _ __ ___ __ ._ ._... . --- _- _-- __ __ __.._ __ , ._ __..-------- __. _..-- -- -- ii . _. _. _ _ - - _ _ _ _ ___ _ ._ _ . _ ___. __..,_.i, `� Pervious TC Calc �; ;: , , _ _ . . __ __. _,_ . ---.� .. _.._____ ___ _ _- � __ __. �� Type � Description f Length s Slope j Coeff Misc j TT ;� ------- �E .._.. _ . .. ___..... .. . .__.-. _.._ .. _ .. ._ . . _ .�..... "' ._. .. .. . . .... .. ._._..... . .. ._. . . _... .� _._.__ �...._.. ��Fixed � � �118.40 min � ;,_ __. .. ._._ . _ _ __ _ _ . _____. _.__. . __ ____._._.. _. _ ._ . -- ,# i Pervious'fC � 118.40 min '� : � ; _ _ . ._ _ _ ___ . . ..___._ _ . _ .. _ . ... . ... .. ... .. -�---�--. _ _- ;: __ . _. ._._ . . _ . ,.._._ .. . _ ___ . . --- __ . .. _ _ __ .. - --- , _ __ _._... _ . _- - ---.. __ T_..._.._-- --_.. . __ - - �_- - ----- - - --- -_ --_.___ _:.� :; Directly Connected CN Calc t' , ;i_ .. _ _..__ ...._ .. . . _ ..._. __.__. ._ _.- - --_... .. __ .. . __.... ..____ . _. ;_ .. .. . . . .... . .. _ _. ..._ , _ ;; Description j SubArea j Sub cn � �I __. . . ._ _ .._ .- -- -- �- -- _ __ _ . _ --- . _ ._._ _ _ .i----- --- . _ ._ _. _, ...._ _.. ..._.�� �; Impervious surfaces (pavements, roofs, etc) i 7.18 ac � 98.00 j� �,_ .. _.. . _._ _ __ ..- ----�____._ _. ___._ .-- --- _..._.._ ---- -- ---- � '� DC Com osited CN AMC 2 98.00 !! �t P � ) ._ . __. _ : .. _-- --- _ _._ _. . . . - . _ _. _ __ __ .. .._______ _ ._.___ , ._ _...__ __ , ._... _ .... . --- - ---__ _ _ _._ ...__::_. j� _ - - _. . _. ._ ----- ------_ __------- - - . ... --- _ -� ----. .___..._ .. ---.._ - - -------- ._ ---_ _ .-- -- -�-- -- -----._- -----__ �; Directly Connected TC Calc � ; _ _ . _ _ _ _ _._ _._._ _...__._ __. - -- .. --.__ _ ._ ____._. ._.__._ ;; i Type � Description j Length � Slope ( Coeff � Misc � TT _ .. .___ . __.._____- -. ____.---___ __._..+-- --.._ _.--_.__._.._ _ .__---- ----__----------------__.., _ .. ___ . _ . . _ _ - --- _ _ . .. ___ -- - _ _ _ _....._ _ . -- _ . _ __ ��Fixed j � �118.40min ; . ----- --------.—___--_ ._ ----------..___. .___-----� — ----�--- ---�--. . .----_.�.- -- �� i� Directly Connected TC � 118.40min z___ ...-----------------�---------.-- _ ._ . _. - -�- ----------__.___ __ �� Licensed to: Barghausen Engineers � I � , i ' i � , � � � -i � � �-�1 (c- . �l . t�c)�'1 c�� i, � ��t �� �.-�� :-�.�y; �-i n�j �o� � r/��u M G :l p pended on: 14:36:03 Wednesda y,June 2 5, 20U8 � J �q �e ���.�,t-�r ��' t. �� �.POOLCOMPUTE [fina! pond� SUMMARY using Puls ,��� ���,�,�t-t n /DO � ��c� �� �� � Start of live storage: 101.5000 ft - __._ _ ---_. Event `Match Q (cfs)!Peak Q (cfs)�Peak St ft i Vol c �Voi acft �Time to Em t � g� ) , � fl , � )� P Y - _ __- --- _ _ - --- - - --- - - -----_ _ 2 year ; 0.0000 : 0.6765 f 104.7432 132606.04, 0.7485 � 62.00 - - -- ---- -- - - - - - - - - — -. - __-- -- ------- - l U year ' 0.0000 � I.5461 1 U6.2903 �5 t 545.65 ; 1.1833 j 67.00 � . i ----- -- _ - -- __ _ _ . ------ - -- -- _- 100 year 0.0000 ; 3.5$79 ; 106.9919 ;6Q87827 i 1.3976 j 68.83 � _ _ . .__ , - ------ _.. _. _ __ - -_ _. _ - - --~< _ _. _- -- - �"���'��---�o(u►�� 2 year H�tdrograph Plot '— "-m-�-ea��Ye r� . : : ; ' ; � ' ' � � a 117G6d�:v : . :—- .-� - -..�:. : '_ : . , _,_ : � - --- -- � �.�2:yeer_outf,nal. � � : : ; ' � ; ; ' , . � : ; ; : ; � , , . , , , , . , , . o , : � . ; , � ` , ' I � , , , , . . 0 , O R O M t� O M 1� O M t� O f'7 M1 O M 1� O C'/ !� O C'1 t� O f�7 t� O (`7 1� O C�i , l7 e- V') 00 U? 00 �fl 00 e- �f'1 00 r Ul OD Yl aD tA 0} r V� OD � N'1 aD �!'1 OD .- N (*? � <D f� 00 O N V N (U OD Qt O N Pl 7 t0 fti CD Q N ? tn fD OD � O �- � e- r c- �- N N (`1 C'V N N C`1 l'7 ('7 C7 (h M M (h M@ Time in Ho�s � 10 year Hydrograph P(at 3 : . 1 , , ; , � , � �.11�06dev -.- , : , - � . � - - , (�-�'1J yevrout-fa��l � 2 ; ; ; ' , ' : : � . . , . . . 4 � � ; -'- �L � . ' . _ . . . . , , � . . , .. - . _ , _ 0 � . - . �� . � � i . . , . , . -., ti o M n o r, rti o c�s r� o c, n. o c, ti o ch � o r� n. o r� r� o c+� e� o rs ti o tD O S''i �D O f`'1 t0 O M tA O (`7 f0 O C'') (a O ("Y CO O l`? (O O M fil O M (II O f`i r0 O �7 CV ("i C fD h. OD 4 ^ (V '? V7 r0 0� O? O CV C') C' CD t� 00 O N 7 4l �O aD T O (''1 . � P- r . <- o- r �-- (V C`3 cV C`t C`F :� !"i M M !�'1 C'S G'7 t'T ('') C''! 7 V' Tima in Ha+.�r: .._.�.__.�_.____.:.�__...._� �..____.,_._.,._..._....�._,�._....+,.�.__...�._.__.,.___.____..__.__.r���._..._.__...._._-.----_..._.�___�_____.._.._..._.. , : 100 year Hydrograph Plot f , � : 5 � ; ; ' : ; : ; . : . �- � -- - : - -- . - , •- ;I�i��17fJfirlev;--. - ; 4� • . : ' ; ' � ; ? 1�7 B 1 OQ ye�r aut tinai ; ; , . � , . ; . .__ _._-� �--,-. - �--�- - , -�- - .--� -- - - - - - -- , _ .� , E3 . -. --� ---- , - -- , -- -s- - - - -: - --�- - � � ` . , .J. .t_ _A. .1.� . ..l. .J_ .t.. _1"_l ^S. ' .I _l_ _J. � � � 1 � . ' � � _ , __ _ . � ' i _ � D� ..�., r � - .. . � . .� � . ...� : - I � i ' i 1 � ' � i ' � : o M n. o o c*� r� o r� e� o m M M1 o c+� n. o c, r� r� o co e� o m r� o o c, n. o tfi a6 � N O (r7 fD O M ID O C7 90 r 4i QO .— lfl OD � fD O fr] fD O (�7 (D O 47 OD � 47 _ � O � P"1 ? fD tti a0 O r N � 47 iD 00 � Q N M � (D P- O} O f�'1 � �fi t� OD � [`I � � � � � r r � s— CV N N N N N N P') M C7 C'i M M f''1 C'l �V � � Time in Hours , Running P:1111000s111170611engineering\\stormshedll�nal pond Report.pgm on Wednesday, June 25, 2008 Summary Report of all Detention Pond Data .._ _ ... . - - -- � Event jPrecip (in) ..i. ____. _ .. . i6 month �1.2800 ...._ _ . �2 year ^�2.0000 . � ' !10 year �2.9000 j ".--. . _ _ _ . ;25 year �3.4500 � _. ------. __- - -- ; : `100 year;3.9000 BASLIST2 [11706dev] Using [Userl] As [2 year] [11706dev] Using [Userl] As [10 year] [11706dev� Using [User 1] As [100 year] [l 1706dev] Using [Userl] As [2 year] [11706dev] Using [User 1] As [10 yearJ [11706dev] Using [Userl) As [100 year] LSTEND .. _ _ _ _ . � Event � Peak Q i Peak T i Peak Vol (ac- � Area �MethodlLoss Rain e� � BasinID � i (cfs) � (hrs) ; c� ; (ac) ! �p � ; � _ _ _ _ __.__ ___ _ _. ..._ _. .. __.__.._ _ ___. . 11706dev� 2 year j 1.5802 f 8.67 � 1.7230 � 25.95 j SBUH/SCS ( Userl � ___ ._ _. ,.. . _. .__ ---- .__ _ _._ _.; _ .... _ _ ...-----_. �._ ._._. _ ..------..._ . � ;11706dev� 10 year � 3.0584 ` 8.67 � 3.1026 � 25.95 � SBUH/SCS � Userl�� :_ . _____ .. _ . ___ .. _._._._ �._.__.._ ,_.. .--_.__._. ..._ _.. i i --..� ..__- -- i - -�---._..,.._.___., �11706dev j 100 � 5.0352 ± 8.67 i 4.8234 j 25.95 � SBUH/SCS Userl � � ; year ; I ; i � _ ; - -- ----; ---- _i _. - ----__. . �....-_--- ----._ _ __i____-'- --- --- -----�---__.._--- --...i i11706dev f 2 year � 1.5802 � 8.67 � 1.7230 ! 25.95 � SBUH/SCS � Userl ; `._ - _ ___. .3.__. -; _ . _--- _._.�.._. - .--.._...� -- -._.—..____._....;.__._.___----. .� ;11706dev; 10 year � 3.0584 � 8.67 � 3.1026 ; 25.95 r SBUH/SCS � Userl ( } -- -- -- . . .i-00---I- � -- f _ ... _ ._ ..._. _ . . __,__ __ ------- --- ---. !_ _ _ _. �_.. ..__ _ �_.__ ; ;11706dev� � 5.0352 , 8.67 � 4.8234 r 25.95 SBUH/SCS � Userl � � year � � � ( BASLIST [Userl] AS [2 year] DET:�ILED [11706dev] LSTEND Record Id: 11706d , ._ _ _. .. .. ,.. _ _. __ _._.. _ _ ___._--_ _ .. _._. _._.__ _._.__�_..._ ,. .._....___ _.._.__ � ;Design Method ; SBUH �Rainfall type � Userl � ._. _ _._. _ .._�._ _. _.._._. — --�- ----..__ __� . _ _ _ ._.__ ._. _? ,Hyd Intv � 10.00 min �Peaking Factor �� 484.00 I E .._ _...____ __�__.... .. __�._.__._ __ �._____.__ __- _ _ ___�.. ._ _ .. . I Abstraction Coeff 0.20 � �_.__.._. __ __ � _ . _ .._. _. - ---- . -_._.... �_. . ._ _ _ . _ _ . .__ __ .__ -- - - - �Pervious Area � 18.77 ac �DCIA � 7.18 ac _, _ _ _ . _ .. .. _ , _ ;Pervious CN ; 76.27 �DC CN { 98.00 _ ._. . - -- .._._ . _.._...__ .. ---- -- _. __ ___.... ___ . - .--_ .._ . .�_ - -_ .__.. --- . `Pervious TC 118.40 min �DC TC ; 118.40 min - _ _ Pervious CN Calc ___ _ _ _ _ �i : -- .-- _ _. __. .. .. .. --- - . _ _. . _ _.. ---- _._�. _.. _; Description ; SubArea ! Sub cn '� ._ . .. _ .._.. ----- . . . _ __.__ . _ _ _ -_�_ - --- , Open spaces, lawns,parks (>75% grass) ; 1.27 ac � 80.00 , .. _. -- -- _ _ _ ._�, _� __ _._____ � .__._�_ . . __ .. - --- _---�_ __.__ --- :� Wood/forest land Undisturbedl2nd owth ; 17.50 ac 76.00 ' ----. __,._ ._ ..__ __ ...._.__ .._ ,_ ._ . __ _ ..� __ ___.... ._.__ _. .- ----- � ------ �� Pervious Com osited CN AMC 2 76.27 _ . p ( ) (- - - -- -- f.�-._____._.. _____. _---.___ _ __..-.----. -- _._ __ __ --_ _ .____ -----_ _ - --- - -- . _ _ .____ _._.._..__._. ,� .._ _ __ _-- ._ -- - _ . . _ . _ _._ _ ___ _ ----___ __- ---___- --- . _..__.. :_: �. ;; Pervious TC Calc _._ __ . . .__ _ ._____._.__ . : E �-- -- , _._._ . .. . ---•- .. ___._.. � Descri t�on � Len th Slo e Coeff �YMisc � TT � TYPe , P � S � P � - - ;� - -- - - -------- - - � _ .--- - -- --- -- ---- . __ -----_ _ _ . - -.._�- ---- --- -- , _ ._ i�Fixed � � 4118.40 min ;: - --- - _- . . - ----- _. . _ _ .--�--------__.._..._ i i Pervious TC � 118.40 min ,._.. . . _._ .. ______..__ ....--- ----___..__--_.._ __ __--- ._ _ .._ . _ ._ __ .. --.. . _ . . , _, .._ _ ._._ _-__ ---- .. . _ _ : ._ _ --� - - - _ _.�_ .____ _.. .. . _ _ . _. _ _. . . ---- -_ _.__.� ._ __ ._ ___-- ----`_. _. :� Directly Connected CN Calc ., :._ ... _ __ . ,__. _. __ _ . . -- --- _ _ -- _--- - - ,_ Description � SubArea ! Sub cn �;---- -- - - -. _._-�--�- .. .__._---_ ___. . . _ . ._ -- - - - -�- --. ._._ . . _.__-: - -. _.. ;� Impervious surfaces (pavements, roofs, etc) � 7.18 ac ` 98.00 �... _. _ _._ . . . __.__--- --- - ---_ ___ ._ _ . ._ __ ;.._ . ... _ � ; ; ;; DC Composited CN (AMC 2) ; 98.00 _ . __ _ _ _ _ __ �_ _ .___ ____. __._,_ _ ___..__._ __._ _._._�. __.__..___ ._ ._. I; Directly Connected TC Calc � ...__ . . _ _. ._ ..____. _ . �_ .-- - --- . . �# Type ; Description ! j Length j Slope � Coeff � Misc I TT , _ __. __. __ _ .------. . __ _. __ _.-_- -- ------.__ .__ . .�. __.._. __—___-_ £iFixed j r- --- - -�- -- �118.40min ,� _ _ . _ . ! Directly Connected TC ; 118.40min [2 year out final] [10 year out final) [100 year out final] LSTEND ___ _ ._ ___ . _--- - - - -.-, ___.__ __ _ .-- -_ __------- t H dID jPeak cfs Peak T hrs �Peak Vol ac-ft Cont Area ac Y Q ( )� ( ): ( )�- - -- ( ) '2 year out final j 0.6765 24.50 � 1.7230 ! 25.9500 � ;10 year out final ; 1.5461 17.67 � 3.]026 j 25.9500 � . ._ _ . .. . : _ _ __.. _ . _ . . _. . � _-- - -- -._ . _ � ,100 yeaz out final i 3.5879 ; 12.50 I 4.8233 ; 25.9500 _ .____ - -- - - -- - --- -_ ..- -- - --.--____ _ __._._ ._._._., _ _ ,_ _._ _ ._ .1 STORLIST [final trap] LSTEND Record Id: final trap �Descrip: �final trap �Increment '0.10 ft ; . ° ..__. ...;_.. _ � ____ ... _ _; i Start El. ;101.5000 ft'Max El. �107.0000 ft i �_ . . . � ... ; .... .� _ -� -� :Length �195.7500 ft;Width (44.0000 ft � ;- ---- - ....__ __.- -._ . . , ...- --- -- ._. _ _. _. .: �Length ssl �O.00v:lh ;Length ss2�2.00QOv:Ih ' ------- - --- -... - -- _ _. , ._ .__._... --- � ;Width ssl !2.00v:lh iWidth ss2 !2.00OOv:lh , DISCHLIST [11706comboJ LSTEND Record Id: 11706com6o ---.__ __... _..__. ._._ ___ _ _._ - ��--- - - - - -- fDescrip: ;11706 combo �Increment j0.10 ft � �101.5000 ft �Max El. �108.0000 ft 'Start El. :- -- -. _ ____ ._ ..�___.. --- -,_ .. .__ . .__. � �11706 orifices jList of Discharge Structures: ' 4 �11706 riser Record Id: 11706 orifices :__ --- _,_ . _-- -_..__, . _._. __ ____.: -,-- ... _ ; :Descrip: �11706 orifices�Increment �0.10 ft ' ;_ _ _ --- ..... .� ..._. .._.__ ..._ .'�__'_'-_._.. '- - ._____r---.._.. .._.. _. , �Start El. ,101.5000 ft Max El. f,108.0000 ft i __.. ._ . __ ., _ . _ __., . ... _ _ .._ _ .._.._--- iOrif Coeff �0.62 �Lowest Orif El. j99.50 'Lowest Diam '3.7207 in �Dist to next j3.8700 ft � ': . .. __ . -- - .; . _. - ---__� --_. __ .- .. ___.._ - - - _ i � �D2 ;5.2734 in IDist to next �0.0000 ft Record Id: 11706 riser _. . -- . __.. .--- - ---- -- . ;Descrip: �l 1706 riser IIncrement �0.10 ft ; . ._. . .. _ _; Start El: I 106.7500 ft IMax El. �108.0000 ft� !Riser Dtam �18.00 in � ; -- ._. .---- ..._-� ---___ _._ . . . ._ Weir Coeffj9_7390 �Orif Coeff13.7820 � Licensed to: Barghausen Engineers , � ' _, I I_. � , � I _ ; I , Appended on: 14:37:41 Wednesday,June 25, 2008 Record Id: final trap _ _ _. __ ,. _ ._ _._. _ _._ , ;Descnp: �final trap �Increment �0.10 ft � ._ __.. . jStart El. i 101.5000 ft�Max El. �107.0000 ft i _ _ ._ . _ --. �Length ;195.7500 ft�Width �44.0000 ft � ,._ __ .----- ..__., . _ .. _. _ . __.___..__. .. ;Length ss 1 (O.00v:1 h �Length ss2�2.00OOv:1 h � __.._ ____... ._-- --.__ ___ _--.. _... ._ _._ _ _.. ---- -- .. (Width ssl ?2.00v:lh �Width ss2 �2.00OOv:Ih j _ _ _--- ---.__�_. -- .----_ -.__ __ ._._ _ -- -- . ____ _. � . . - -- - - --- .___ _ --- .._ _._ _ _ ._...__ i Stage Storage ltating Curve � :- _. _-- - __ . , ___-- __ ;101.5000 ft C 0.0000 cf !104.3000 ft�27589.2587 cf! � , _ ___ __ � _ ____ _ '101.6000 ft! 865.6577 cf ;104.4000 ft!28705.2923 cf; _ , _ __ _ _ . ;101.7000 ft� 1740.0413 cf i104.5000 ft�29830.5000 cf; ` _. _; _ _ ... . _ ;101.8000 ft� 2623.1670 cf j 104.6000 ft j30964.8977 cf� , _._ .._ _ _ . _ s 101.9000 ft�3515.0507 cf �104.7000 ft I32108.5013 cf ; _ ----___ ,_----.___.----- __ --- - ;102.0000 ft I 4415.7083 cf �104.8000 ft 33261.3270 cf j - ----._ ...-------_.__._____,_ ___ _---._. _. --- _ _.. ;102.1000 $I 5325.1560 cf �104.9000 ft�4423.3907 cf� __. _ ._ . _...__._.._ ._.____. _. _ . - - - :102.2000 ft 6243.4097 cf =105.0000 ft�35594.7083 cf � _ _ _. ._ _._ ._____ _.----__--- --- - - -�- --------- `102.3000 ft' 7170.4853 cf :';105.1000 ft�36775.2960 cf� : - - - - ---, _ - _______ ; _ _ - - -- , �102.4000 ft j 8106.3990 cf ;105.2000 ft j37965.1697 cf� . _.. __ .--- _- -- ----- ._,__. _ ---- .. .._-- --___� f 102.5000 ft�9051.16b7 cf i 105.3000 ft(39164.3453 cf� ;102.6000 ft(10004.8043 cf�105.4000 ft I403 72.83 9Q cf ` _ i _ � _I ;102.70�0 ft�10967.3280 cf I105.5000 ft�41590.6667 cf I �102.8000 ft�11.938:7537 cf`105.6000 ft j42817.8443 cf i ;102.9000 ft�12919.0973 cf;105.7000 ft�44054.3 880 cf , _ :_ ___ __._ .-. .---;_ _____.._.... _ . _ .___. .__ . �103.0000 ft�13908.3750 cf;105.8000 ft�45300.3137 cf ;103.1000 ft;14906.6027 cf�105.9000 ft�46555.6373 cf; t ; 103.2000 ft�15913.7963 cf�106.0000 ft�47820.3750 cf� 3 ' � '.._.' ... . . ... ._...,_'__.____._�._. ._..'____.... �_.._. �___._.__'_'-_�.___.___.. _..... !103.3000 ft j 16929.9720 cf�106.1000 ft I49094.5427 cf i ` --.. _�, __ ___ , _. ------ __.. j 103.4000 ft�17955.1457 cf�106.2000 ft�50378.1563 cf i _ _ _ �103.5000 ft�18989.3333 cf�106.3000 ftj51671.2320 cf _. . __ _..____..___. _ �103.b000 ft 20032.5510 cf i106.4000 ft�52973 7857 cf ; _ __. _- -..---.._.._._.._ .__._._ . ._-----_._ _ _._ _____ _.---, i 103.7000 ft�21084.8147 cf;146.5000 ft(54285.8333 cf� ---- ----�._____ _.----_,---_.. . __._ __ ;103.8000 ft 22146.1403 cf i 106.6000 ft 55607.3910 cf� :..____ . ..__� __ ..__ _._ -- _..;._._ __.._. -- - -' �.---`- _ __ � � -� `'103.9000 f�;23216.5440 cf;106.7000 ft 5693 8.4747 cf� __.... . _ _ 104.0000 ft 24296.0417 cf;106 8000 ft 58279.1003 cf; _� �. __ _._ ..�. _� .. _ _ . � . __. _ _ _i ;104.1000 ft I25384.6493 cf�106.9000 ft C59629.2840 cf� , __. - _ . _ _. ;104.2000 ft�26482.383Q cf!107.0000 ft�60989.0417 cf i--... _ _. _._.__ _._----...�__. �__ .. ._ _____ . _ ..---- ____..� i i 107.0000 ft�60989.0417 cf Licensed to: Barghausen Engineers � '__ , ,-� ', i _ , i_.� � � I ; � :_ ; Appended on: 14:38:06 Wednesday,June 25, 2008 Record Id: 11706combo ;Descrip: �11706 combo ;Increment;0.10 ft �Start El. �101.5000 ft �Max El. I 108.0000 ft . __ . _.. _.. . ... __._. �List of Discharge Structures: 11706 orifices 11706 riser Record Id: 11706 orifices - - _..- ----- __ __. _._.._. iDescrip: '11706 orifices (Increment ;0.10 ft ; ; _ ,_. .__ . .-- --. _.__...- -._ . .. . _ ..._. . . i Start El. i 101.5000 ft IMax El. j 108.0000 ft i ._ - --- -- _ .__.< ;Orif Coeff �0.62 �Lowest Orif El. F99.50 ; {Lowest Diam�3.7207 in (Dist to next (3.8700 ft � ; _ . _. ;D2 `5.2734 in lDist to next r0.0000 ft � Record Id: 11706 riser _ ._ , . _. . ; . _ . . _I `Descrip: �11706 riser �Increment ;0.10 ft � Start El. 1106.7500 ft jMax El. +108.0000 ft i �Riser Diam I18.00 in � ; _.. ._______ -___ . _ _ __ . _ _____�___ . _, � ;Weir CoeffI9.7390 lOrif Coefff3.7820 _._. ----- ------- _ -----_--- ---._--�I � Stage Discharge Rating Curve � ._-------,--------_., -- .._._.. _ -- �101.5000 ft�0.0000 cfs i 104.8000 ft� 0.6824 cfs :---- ------ -._. . - - �- ;101.6000 ft 0.1188 cfs 104.9000 ft 0.6927 cfs -._. __._-� --- ------- - --- --�- - ---- _.._ . �--_ _ _ _--- �.._ ---- ---_ .._ . _ _ . _ �101.7000 ft;0.1680 cfs i 105.0000 ft� 0.7028 cfs � : . --_ .. _ _ . .._ _._ _ ._ __. _.. , - --- _ _. �101.8000 ft�0.2058 cfs�]05.1000 ft i 0.7128 cfs � ;101.9000 ft�0.2376 cfs j 105.2000 ft; 0.7226 cfs ; ;102.0000 ft�0.2656 cfs�105.3000 ft; 0.7323 cfs ; _ _ __ .._ , ..., -- - --,. _ . _�. __..__._ _. .._, ;102.1000 ft�0.2910 cfs;105.4000 ft j 0.8726 cfs ' . - -. ___ __ . _._- - - �102.2000 ft;0.3143 cfs j 105.5000 ft�1 0234 cfs ,__._ . . _ . _ . ,------- --,- ___ ..__ _ ;102.3000 ft�Q3360 cfs!105.6000 ft j 1.1226 cfs � -----__- -- . . ---- ____._- ____ _---- �102.4400 ft I0.3564 cfs�105.7000 ft i 1.2034 cfs � , _ ._. ..,._. __ __ - - - -- -- � -- i 102.5000 ft 0.3757 cfs 105.8000 ft� 1.2739 cfs � f � __._._. � , � _- ;102.6000 ft�0.3940 cfs;105.9000 ft; 1.3374 cfs _ _ _ __ _ , �102.7000 ft 0.4115 cfs 106.0000 ft� 1.3959 cfs _ _ _ -- �-- -.,.._ _ _._ . __.--------- ' ;102.8000 ft�0.4283 cfs i 106.1000 ft C 1.4505 cfs � ; - ---. ._ _.._.__ ...__ ___.._._-----_r__ _ _ __... ;102.9000 ft�0.4445 cfs;106.2000 ft� 1.5020 cfs ; - - -__._ -----. __ __- .____..._.. ..___.. . __..__. . _.; ;103.0000 ft�0.4601 cfs i 106.3000 ft� 1.5508 cfs � _ .:. __. ... - ;- __ _. .: _ ... _ . ;103.1000 ft;0.4752 cfs�106.4000 ft s 1.5975 cfs � _ _ _ _ � :103.2000 ft;4.4898 cfs E 106.5000 ft j 1.6422 cfs � ° _ . . _.. _ ._. -- . . ;103.3000 ft j0.5040 cfs�106.6000 ft�1.6853 cfs � -_-. __. - - -- . . ._ _. ._. _ f 103.4000 ft�0.5178 cfs;106.7000 ft I 1.7270 cfs � ._ __ _ __ __.___...__ __--r-----_._ _---.--,._______.____ . �103.5000 ft I0.5313 cfs!106.8000 ft� 1.9306 cfs _ . . _ ... . . ---- ----------- �103.6000 ft 0.5444 cfs 106.9000 ft�2.6551 cfs � . . . - - - ( . _ . ;l 03.7000 ft j0.5572'cfs I107.0000 ft� 3.6706 cfs ; .; _. . _. _ __ __...... . __ . �103.8000 ft j0.5697 cfs j 107.1000 ft; 4.9065 cfs ...._ _ _ `_ _ . �103.9000 ft�0 5820 cfs{107 2000 ft� 6 3276 cfs � :104.0000 ft�0.5944 cfs�107.3000 ft� 7.9118 cfs � � _ _ _.. _ __ __.__ _ _. ..__ --E ;]04.1000 ft i0.6058 cfs�107.4000 ft(�8.8483 cfs � 104.2000 ft;0.6173 cfs;107.5000 ft' 9.3910 cfs � �104.3000 ft;0.6286 cfs;107.b000 ft t 9.9002 cfs ; =104.4000 ft;0.6398 cfs f l Q7.7000 ft;10.3814 cfs; - - ___ .._.._____.__�------ - -- --....__;... . ..._._.. , :104.SOOU ft l0.6507 cfs(l 07.8000 ft�10.8390 cfs'. , � , . _ _. _ . . _ . ... _ _ ._. _ � °104.6000 ft;0.6614 cfs�l 07.9000 ft'11.2762 cfs� , .. . ... . . . .. . . .... __ . ._ ._ �. _ _ ,; ;104.7000 ft�0.6720 cfs t 108.0000 ft j 11.6955 cfs i , Licensed to: Barghausen Engineers Appended on: 14:38:28 Wednesday,June 25, 2008 11706pre Event Summary �--- -- __--- - __--- ___- ---- ____.__ . _�----,- - ---. ---. - _-----, , Event �Peak Q (cfs)�Peak T (hrs) �Hyd Vol (acft)iArea (ac)�Method�Raintype� _ . _ _ . _ _ _.. . _ _._ _. _ . .... -- - I �6 month ; 0.2493 � 24.00 ( 4.2688 I 25.9500 ; SBUH ( Userl ! . . . .. _ . . . ._... _ . .... _ ._._.__.. _ ..._.__ _ _..._._. .F.____...__"'._ __... _.._..... i � 2 year = 0.7295 ' 12.83 � 0.9575 ( 25.9500 1 SBUH ( Userl ; ; - ---- - - _.�.--� ---- _ ..... ._ _. _ _. - 10 year ; 1 7236 i 10.83 j 2.1493 ; 25 9500 � SBUH Userl i � . . ...-. . ..__.... ___.._ . _ . . --- .... _. ._.� ._ .. . . . .._. ._,.___..__._ _ ._. -r-_ _._._ .. _ -. .� ;` 25 year � 2.5522 � 8.83 � 2.9918 j 25.9500 ; SBUH � Userl � � _ __. .� ._ ___ ,___ ..__. _ r_ .__ __ _ ._ _ .�__.__ __ . . ; _ ..__. _.... .._ ._ ___.. ;100 year; 3.3778 8.83 � 3.7260 � 25.9500 ; SBUH f Userl Record Id: 11706pre __ . _. _ .__ _ _.___ _ _ _ __ ._._ ... _. . __ __ - -�-- :- �__ � -- -- ; , 'Design Method ' SBUH ;Rainfall type � Userl � � . _.. . ... . _ . _ . .__ ,----- - ...._..__ _ .__ _.. _._- -�--. ;Hyc! Intv 10.00 min :Peaking Factor i 484.00 � , __ _ _ _.. _ . _ . ...._. � _ _.. _ __ _ _ ..__. ._ .. . _. ._ ..__._. . __ _ . _ .. � _. . ._�_---- .; .. _ : � �Abstrachon Coeff ; 0.20 , __. _. _ _ . _. _ _ __._.__-- - ._ _.__. .. .. .�. _._. _._ _--- -. _...i ;Pervious Area ! 25.95 ac �DCIA i 0.00 ac � : - - - _ _ _ ._ _ _ __�. _ _ _ - �Pervious CN ; 7b.85 �DC CN 0.00 i � _ _ _ . _ _ _.. . ._ . ___ _ _. ------ _ _ :-- - --_ _._ _ i �Pervious TC � 122.70 min �DC TC ; 0.00 min I _ _ . .. _ _._ _ � _ --- -_ _. __ _ -._i e=. _ _ - - Pervious CN Calc ,. _ `I j�... ._ _.....�._...� ._......��...�... _. �_..'___._T.�_-_...��.___..._..__� �_._.__.J .�._._...__ '_� ' .__'���.�-__� . .. __.____ �� '1 Descri hon � SubArea Sub cn i� �: p ' , �- - --- �- , __- __- --- ----- -----_--___ ___._ . _ . ___.___ - ----.--_ _ -- ----.__ _ -�� `� ` Wood/forest land Undisturbed/2nd owth j 17.50 ac 76.00 _--_-- -- ; ( � ) � ( ;; _ _________--- -_ _.---.. _________ - - ----_.__ -- --. ---------_._ _ ___ __, E� Pasture or range(good) j �8.45 ac r� 78.60 i� �_._ _ ..- --- - -.. ___. ___. _.._ ___ ___... __ _ ,_ _._ ...... _.. _____ --. _ _ __ ___ ________.._�__ # !E Pervious Com osited CN AMC 2 76.85 ;, P { ) i ,. _ _ _ _ . _ . �` Pervious TC Calc '� �� 'i . . __ - --- . . - -- -- -,. - _ . -� ._ .. _,--... . ;i Type ; Description , Length ; Slope � Coeff : Misc � TT s� ..._ ,._ .. ._-__ - ._ . �_..._ .- - -_ _._.__.. _ --- --- _._ . . .. __ . _.__. - � ..__... _ : i,Fixed �122.70 mm � ; . � . . ._ . _ ._ _ _ _.. . _ . . -- _._ __.__._ ... .. _.... . __..... __.._. __. . ...... ....... ...__. ._. _ a �� Pervious TC � 122.70 min '� ,__ _ __ _ __ __ _ _ . _ ___ __ __ _ ._ � Licensed to: Barghausen Engineers Appended on: 14:38:52 Wednesday,June 25, 2008 11706dev Event Summary . . _ _ -- - _- __.._. ,--. - _ _.. __ _..__ ___ - - --, ' Event IPcak Q (cfs)=Peak T (hrs)IHyd Vol (acft)�Area (ac)�Method�Raintype I _ . _ � - . . _ ._ _ . __. . I 6 month � 0.7854 � 8.33 ! 0.8161 } 25.9500 � SBUH � Userl ' - ; 2 year j 1.5802 � 8.67 f 1.7230 � 25.9500 ; SBUH ( Userl ; . _.._ - - - � - - - -- -�-- - . - --_ ; _- �--- -- --- ------- � 10 year ; 3.0584 f 8.67 � 3.1026 ': 25.9500 ; SBUH I Userl � . ., - - - - - ---- . ..__� . ._ .__.___.---' _ i _._ ; 25 year ; 4.1133 � 8.67 ; 4.0306 25.9500 SBUH Userl ._. _ E _._ ; .. __ ._ _. - - _ _. . .. .. . _..� ._._. .__.... __....__ _. _. .. --. _. . ._ � ;100yeari 5.0352 1 8.67 � 4.8234 � 25.9500 � SBUH I ~Userl � _ .._. _. ._. __._ . ._.. .__._ .... __.__ _ _.._.._, Record Id: 11706dev - _ ... _ _ _.. - --- _ ___- -- � -- .._._.___ -- ----- -.. . . _- ------- - ; �Design Method j SBUH �Rainfall type ( Userl � -__ _ .. _ .__ ._ . . _._. __. _ _ _ -- __ ._-_ _ _ _---- - .._ . - �--- . . ..._ ... _. .. _. ..__._._. .. .._ ;Hyd Intv I 10.00 min !Peaking Factor E _ 484.00 :.------_._ --- - ---- __---- - - --- ---- -- ..- - ----- -- --.__. -- - -_ _ � iAbstraction Coeff � 0.20 =- _ _ _ ---- -- -- ___ .. .. _ ..__... _ - - ----_._.�_.__ .. _._ __._ -- - -�- ------- �-------._._ . ;Pervious Area � 18.77 ac ;DCIA � 7.18 ac _ . , _ , __.. _ _ Pcrvious CN ' 76.27 ;DC CN � 98.00 � !Pcrvious '1'C 118.40 min 'DC TC 118.40 min �� Pervious CN Calc '� :, �� _. ... _. _. ------- ---- - -- --,-,____.._. . ___, � . .....---- -- . .. - --- - -- - �--_� __._. Description j SubArea j Sub cn ;� :: __ __. .. .-- - -.__ � ___.__ ._ --- - _. __ ---. - - ---� ---- -- . Open spaces, lawns,parks (>75% grass) �~ 1.27 ac � 80.00 �; ;� -- _ . . ----- -- --- -. ._. ..._ _ - ----- . ._._ .. --- ------ ---- _ . �; Wood/forest land (Undisturbed/2nd growth) {� 17.50 ac I 76.00 � � . __ -- - _ _ _ . __. __ _._ _ _..._ � Pervious Composited CN (AMC 2) ( 76 27 �._ . .. .. . .._..__ ..__. _. _ _. -- -_- . .. __ _ _. .__ _ - -- - - _� f ._ ._ ......_ _. , _ . _.._ . _. _. .__ __ . _ __... _ .-- -- ---- ._._.-- � . . _ ._ . _ _ . - .. � Pervious TC Calc � � - --_ _ - -- - . . -- - - _ r- --._--- - ---- ��-----------•- - --. ' Type Description ; Length r Slope � Coeff ; Misc ; TT ' ` �� _ _. _ . . . __ _ ___ _._ _ _ __. . __ .__. _ Pixed � � j 118.40 min �� _ . . __. __ .. ... ..._.-- -...___ .- -- - - - - . .. . �. , __�._. _ _.�_._. .._ _ . _._. ._ i� Pervious TC � 118.40 min �. _ _. ... _ _._ _.._...__.._.__... ----.. _ _.__... _ ...._.... .---_ _ ._.__ . .,-- _ _._. _ _- _ _._ _._...._.__ .. .. ,� _ .- - -.-. - -_,_.._ _. __ _--- _ __ _ ____. __ ._ -- ---__ .._ _.. __..---- --- - - . _ � _ __�. --- - -- ----:. Directly Connected CN Calc �� _ _.___ _- --- ------ ------ --- _.__- -- --- _.----- --- : . _ _ . , ; Description I SubArea j Sub cn �! _ ___� ... _ .._. P � > > ..- --.._ __ __ _.__.-_----- _. ____ _---•---_-.__..._ . _. __._..__ __-----._ _ __..._... _. ' Im ervious surfaces avements roofs etc) � 7.18 ac � 98.00 i� ---.. _. _._----.. . _ .. __ . _ _ _. _._. ...I ._____ _...__ .�� ; DC Composited CN (AMC 2) � 98.00 _ _ . _.__.. _ _ . .--- - -- ._ __.._--- _- -- _._ _..__._ .____. _ . --------- --�_.... . _ _._ ._; _ ,. _ __ . . . _ _. _._ . . _ _ _._ .. . -- --- _ _ - _ . . _ __ _ ...__. _ __. _ ._ _ . - --. . ._ _ _ - --- - -- - -- -- - -- -�---- - - ---- ._ . ---- -- -- � Directly Connected TC Calc � 1'ype llescription � Length ; Slope 1 Coeff ; Misc � TT �'� � : __ , � ----- __ _. -- -... __. .�_. _ . -- - . ._._— _ ----__ _._ _-- --- — -- T. _ ----- _._ _ _ _. . _--- �. -- --_ _ _..---- - -- _.. _ _ _ .. ��Fixed � . _ � _ I 118.40 min _._.__.._.__ ----_.. _ —.._ __.._ _--- -----_- ___-----_ _.____. _. —__.__..--- . __.._._.___ � Directly Connected TC 118.40min ,� . : � Licensed to: Barghausen Engineers