7963

• UCREFRP Catalog Number: 7963
• Author: U.S. Fish and Wildlife Service.
• Title: Streamflow Needs of Rare and Endangered Fishes
• USFW Year: 1990.
• USFW - Doc Type: Yampa River Interim Flow Recommendations - Final Report.
• Copyright Material: NO

Table 2. Historic, environmental baseline, and rare fish recovery flows for
the Yampa River at Deerlodge Park, CO (RM 32). Units = cfs

Month

25%3 Historicl

50%

75% Environmental baseline2

25% 50% 75% Flows needed for
aquatic resource
recovery and
maintenance.
APR 4,882 3,583 2,278 4,531 3,139 1,976 Environmental
baseline flows;
MAY 10,484 9,089 6,189 9,680 7,856 5,604 percentile which
occurs naturally
JUN 9,316 7,247 5,143 8,585 6,198 4,416 in any given
year.
JUL 2,295 1,427 789 1,908 1,161 598 .
AUG 627 370 278 514 364 251 364 (50% exc.)
SEP 384 231 148 323 254 177 254 (50% exc.)
OCT 604 386 244 439 339 245 339 (50% exc.)
NOV 588 424 310 474 385 326 385 (50% exc.)
DEC 480 373 267 437 327 278 327 (50% exc.)
JAN 419 338 275 404 327 276 327 (50% exc.)
FEB 512 390 337 450 373 333 373 (50% exc.)
MAR 1,168 860 705 913 659 554 659 (50% exc.)
1 Historic flow (cfs) is actual flow record from 1922-86.
2 Environmental baseline simulates conditions with existing water projects
(1930-82) and projects which have received favorable biological
opinions.
3 Values given as % exceedence flow.
10