BOARD00175

• Board Meeting Date: 9/21/1998
• Description: ISF Section - New Appropriations - Notice to Appropriate Instream Flow Water Rights in Water Division 2
• Board Meetings - Doc Type: Memo

9/21198 - Final RSR

NATURAL ENVIRONMENT SURVEY

Survey Date: 9/23/92

Survey Location:
. Survey Summary:
Basis for ISF:

At mile marker 20
165 feet electrofished. Sample included: 92 rainbow trout (6" - 24").
rainbow trout fIShery

FIELD SURVEY

Survey Date: 9/22/95

Method Used: RlX I Grassline Width (ft):
Measured Flow (cfs): 1.09 PHOTOS:
Survey Location: At bridge in NE SW S4 T16S R69W 6PM
Notes:

9.5
3

WATER AVAILABILITY
Method: The Eightmile Creek #1 hydrograph was derived as per the USGS WRI Report 85-4086
(Mountain Region), See hydrograph below, The summer and winter instream flow
recommendations were reduced to LI cfs (7/15 - 10/14) and 0,65 cfs (10/15-3/31) based on the
water availability analysis, As per the Division 2 Engineer, senior water rights do not present a
water availability problem within this reach of stream.

OCT NOV DEC
1.2 .96 .74

MEAN MONTHLY FLOWS (cfs)
IAN FEB MAR APR MAY JUN
.63 .65 1.0 2.5 10. 18.

JUL
3.2

AUG SEP
1.5 1.1

.

Eightmile Creek u/s of East Fk Eightmile Creek
SYNTHETIC HYDROGRAPH

5

Iii
LL. 4
o
-.;

;:
o
i 3
>-
...J
I
!Z 2
o
::;:
~ 1
W
::;:

----

----

o

OCT NOV DEC JAN FEB MAR APR MAY JUN
MONTH

I - CWCS ISF AMOUNT I

JUL AUG SEP OCT

. I Eight_#1.wk4 I

C:IMARKINEW _RECSIDIV_2119981WPlDiv2 Reo Sum Rpt B,doc