FLOOD01765

• County: Chaffee
• Community: Chaffee County
• Stream Name: Chalk Creek
• Title: Flood Hazard Study, Appendix 2 Theoretical Floodway Computations
• Date: 8/1/1978
• Prepared For: Chaffee County
• Prepared By: USDA Soil Conservation Service
• Floodplain - Doc Type: Floodplain Report/Masterplan

..DWY.:=~:

-

-

-

-

-

-

CHALK CR 'lDDO HAZARD

~f:~TlON UI

Fr.

CHiNNFl RaNKS IT STITrONS IOR2. A~O 1175.

Or!'lCHlRGf'.

FlMnwn STa
SY~A! LfFT R'~HT

*--------____wrOTHs-.O'N-rT .-::-~;~;,;.~;;~.
LEFT CHl~L Rr~T TOTal

----- ----
.0 IOR2.
.. IOR2.
I.D--1.0112.
I.. IOlIl.

----- ----
1<a<a3. O.
ISO". G.
1~9R. n.
I ITS. G. /
SECTION 133 = FD

---~.!!'--- -~"!'~~~---- - ~!'"'---
93. 818. 91i.
3<'9. "21.
.____..___.32" m _ , 126.
o. 93.

-

-

-

-

-

-

-

-

-

-

109G. CFS

OELTA
ElEV IREA V IVII V**2/2G OUTPUT IlfSSlClf
---'!!. -- ---- "!'---- ------- --------------------.-.-
850<'.7 297. 3.6?C
RS03.1" 2118. 3.7<a .01
8503.7 IR9. 5.76 .31
1150".<' 1T9. 6.09 .:1T now IN CNINNf:L
- -~ -- . -

CHANNEL BANKS AT STATIONS 1498. AND 1583. DISCHARGE- 1080. CFS
FLDODWAY STA a------------wIDTHS IN FT.----------a DELTA
STAGE LEFT RIGHT LEFT CHANNEL RIGHT TOTAL ELEI/ AREA 1/ AI/a 1/..2/20 OUTPUT "ESSAOE
------- ------- ------------------------
.0 1498. 1874. O. 85. 291. 376. 8544.8 292. 3.69
.5 1498. 1760. O. 177. 262. 8545.3 253. 4.27 .07 NO KD IN LEFT F.',
1.0 1498. 1653. O. 70. 155. 8545.8 201. 5.36 .24 NO KD IN LEFT F.P.
1.5 1498. 1633. O. SO. 135. 8546.3 199. 5.44 .25 NO KD IN LEFT r.p.
SECTION 135 = FE
CHANNEL BANKS AT STATIONS 1445. AND 1525. DISCHARGE- 1080. CFS
FLOODWAY STA a------------WIDTHS IN F1.----------a DELTA
STAOE LEFT RIGHT LEFT CHANNEL R18HT TOTAL ELEI/ AREA 1/ AI/G l/aU120 OUTPU1 "ESSAOE
------- ------- ------------------------
.0 1445. 1525. O. 80. O. 80. S600.7 142. 7.62C
.5 1445. 1525. O. O. 80. 8601.2 181. 5.96 -.35 FLOW IN CHANNEL
1.0 1445. 1525. O. O. 80. 8601.7 221. 4.88 -.53 FLOW IN CHANNEL
1.5 1445. 1525. O. O. 80. 8602.2 261. 4.13 -.64 FLOW IN CHANNEL
SECTION 137 = FF
CHANNEL BANKS AT STATIONS 351. AND 405. DISCHARGE- 1080. CFS
FLOODlIAY STA a------------WIDTHS rN F1.----------a DELTA
STAGE LEFT RrGHT LEFT CHANNEL RI8NT TOTAL ELEI/ AREA 1/ AI/a 1/..2128 OUTPUT "ESSA8E
------- ------- ------------------------
.0 349. 405. 2. 54. O. 56. 8678.9 120. 8.98C
.5 351. 405. O. O. 54. 8679.4 140. 7.69 -.33 FLOW IN CHANNEL
1.0 351. 405. O. O. 54. 8679.9 163. 6.61 -.51 FLOW IN CHANNEL
1.5 351. 405. O. O. 54. 86S0.4 181. 5.18 -.73 FLOW IN CHANNEL
.