FLOOD10207

• Designation Number: 503
• County: Jefferson
• Community: Unincorporated Jefferson County
• Stream Name: Woman Creek, Walnut, Upper Big Dry and Rock Creek
• Basin: South Platte
• Title: Drainage & Flood Control Master Plan - Rocky Flats Plant
• Date: 4/1/1992
• Designation Date: 9/1/1999
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABLE IV-8

Table IV-8 (Continued)

SUMMARY OF PEAK FLOW AND RUNOFF VOLUME FOR SWMM ELEMENTS'
FUTURE nEVELOPMENT CONOITIONS (6-Hour Storm)

SWMM Location Drainage :Z.Year Eveat s.Year Emtt to-Year Event Z5-Year EYent SO-YearEwnt llXl-YearEvenl
Elemmt (Plan Basla Ar<a
I NumW Designation) (acres) Q V Q V Q V Q V Q V Q V
(ds) (AF) (dol (AF) (dol (AF) (ds) (AF) (do) (AF) (ds) (AP) I
137 WADIV 2 160 2 1 2 1 3 1 4 2 10 4 25 8
138 WADIV 3 160 2 1 3 1 4 1 , 2 13 4 32 8
139 WALt 154 2 1 3 1 4 1 5 2 11 4 29 8
140 WA3 1,120 3W 52 570 74 790 105 1,300 149 1,500 178 1,900 2119
141 WA6 269 10 2 41 7 80 13 150 22 190 28 250 36
142 WAS 26 0 0 0 0 0 0 1 0 3 1 7 1
143 WA3 371 140 19 240 27 3W 38 500 53 600 63 730 73
147 WA12 237 170 17 26() 22 3211 29 4W 39 540 45 640 52
148 WA13 70 9 2 14 2 22 3 57 6 74 8 99 10
149 WA14 26 1 0 1 0 4 0 211 1 28 2 39 3
150 WA3 480 180 28 310 38 430 54 670 71 790 84 960 98
151 SWA1 346 190 n 290 35 380 47 560 liIl 650 69 780 80
157 SWAt 141 85 14 1211 17 150 22 2211 26 250 30 300 34
158 SWA2 141 85 14 1211 17 150 22 220 26 250 30 300 35
159 WA7 38 1 0 3 0 11 1 3I 3 41 4 56 5
1li1l CSWAA 115 92 14 130 17 lli1l 22 230 26 26() 30 310 33
161 CSWA B 1119 1211 13 170 16 2110 211 280 25 3W 28 370 32
162 CWAB 11 21 1 29 2 35 2 44 2 50 3 58 3
163 CWAA 15 27 2 38 2 46 3 57 3 65 4 74 4
164 CWAC 117 150 14 210 17 250 22 330 26 380 30 44Q 33
165 CWADlV 2 29 44 4 liIl 5 73 6 95 7 110 8 130 9
166 CWADIV 1 W 27 2 37 3 46 3 liIl 4 69 5 78 5
167 WADlV 2 11 17 1 25 2 30 2 39 2 45 3 52 3
168 WADIV 2 326 64 8 90 9 110 12 150 15 190 19 270 18
169 WAll 371 140 19 240 27 3211 38 500 53 600 63 730 73
170 SWA3 173 110 I3 180 17 230 24 350 30 410 35 480 40
348 WADIV 2 486 64 8 90 10 110 I3 150 16 190 23 270 35
356 WA1 2,131 330 65 6W 92 890 132 1,5lXl 192 1,800 :m 2,21Xl 297
359 WA2 953 40 12 72 16 1211 24 220 38 310 52 4W 80
362 WAS 698 39 9 58 11 74 14 110 17 150 27 260 48
369 WAll 250 180 18 280 23 350 3I 500 41 590 48 690 55
372 WAl2 198 170 17 240 21 290 27 400 35 470 41 560 47
374 WA12 128 160 15 230 19 280 24 370 29 430 33 490 37
375 SWAl 314 190 n 280 34 360 45 530 57 620 65 740 75
ROCK CREEK BASIN
185 RCl 1,862 140 I 30 190 I 38 400 75 93() 138 1,2110 17811 1,600 236
186 Re2 224 91 I 121 2 14 2 19 3 52 511 110 11

I SWMM !
Location I Drainage 2-Year Event S-Year Event to-Year Event 2S-Year Event SO-Yeu.rEvent tOD-YearEvent
Element (Plan Basin I Area
Number Designation) (acres) Q V Q V Q V Q V Q V Q V
(ds) (AF) (cis) (AF) (ds) (AF) (ds) (AF) (ds) (AF) (ds) (AF)
STANDLEY lAKE BASIN
105 SL4 2,995 54 23 270 81 570 150 1,000 243 1,300 313 1,700 395
1116 SL5 1,261 42 12 140 33 270 57 4W 88 610 115 8211 149
107 SL6 877 58 11 210 31 350 54 6W 85 770 107 970 132
108 WI 2,880 64 25 190 48 430 103 900 188 1,2110 248 1,700 328
109 SWI 986 29 10 58 17 150 40 3W 76 430 99 570 126
110 SW2 813 32 10 46 12 1W ~, 270 60 370 79 490 102
III SW3 64 58 6 79 7 95 9 130 11 150 12 180 14
112 WI 1,702 27 10 100 24 230 51 470 93 650 125 910 173
ILl W2 1,414 211 7 72 15 150 34 360 66 510 91 730 131
114 W3 1,370 20 7 60 14 140 3I 330 62 480 86 700 124
115 W' 154 3 1 5 1 25 5 66 10 90 14 1211 18
116 W5 1,113 17 5 35 10 86 19 2211 39 330 59 5W 89
117 W7 230 4 1 7 2 8 2 62 111 98 15 150 21
118 W6 749 12 4 17 5 44 10 92 18 150 29 280 49
119 WOMl 570 10 3 14 4 18 5 24 6 62 13 160 28
1211 DlVl 192 11 3 47 7 87 12 170 19 210 23 270 29
121 DIV2 173 10 2 41 6 76 10 150 17 180 21 240 26
I22 DIV3 % 9 2 28 4 '7 7 82 10 100 13 130
16
123 W9 83 12 1 36 3 57 5 100 8 1211 10 150
13
124 WIO 186 12 2 38 7 67 12 120 18 150 23 190
28
180 WI 519 8 2 35 6 70 12 130 18 170 2W
23 29
181 SL4A 192 61 7 190 19 300 32 520 51 640 64
KOO 7R
312 W3 1,267 W 6 40 11 110 24 290 50 4W 73
640 107
315 W5 979 16 5 23 7 52 12 150 28 250
44 4W 70
GREAT WESTERN RESERVOm BASIN
126 WAlO 134 3 1 26 4 50 7 9. 12 IW
15 150 19
127 WA9 64 3 0 17 2 30 3 55
6 69 7 88 9
129 WA1 2,374 310 67 630 100 960 146 1,600
215 2,000 266 2,500 333
I30 WA2 1,011 39 13 75 18 130 27 240 43
340 59 500 88
131 WA4 160 3 1 . I 21 4 6'
10 90 14 130 18
132 WAS 794 37 11 68 15 100 W 160
28 220 38 340 62
133 WA 15 147 2 1 3 I 4 I 5
I 11 3 29 7
I34 WADIV 4 550 38 8 56 10 72 13 100
16 150 24 230 41
135 WADIVl 538 48 8 69 10 87 13 1211
16 170 23 250 40
136 WADlV 2 294 33 4 46 5 57 6 75
7 110 11 180 19

The values listed are the peak flow and volume of runoff occurring at the downstream end of the SWMM element.

See Figure IV-2 for location of design point and r.gmc 1V-l for SWMM model schematic.