WSPC06199

• File Number: 8541
• Description: San Luis Valley Project
• State: CO
• Basin: Rio Grande
• Water Division: 3
• Date: 7/15/1981
• Author: Robert H Weimer
• Title: San Luis Valley Project Closed Basin Division - 1980-1981 - Revised Fish and Wildlife Mitigation Plan ‎(June 1981)‎, Closed Basin Division, San Luis Valley Project, Colorado
• Water Supply Pro - Doc Type: Report/Study

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Table 1
Duck Prod\lction in San Luis Valley, Colorado
1964-1978!:.../
Ave.l'age nur.lber Estimated' Percent totnl Percent total
Area size Acres of of breeding avertlge unnual wetland in production 1n Ducks produced!
~11 acres 2/ i.'etland 3/ pairs ----P.E..oduc tion San Luis Valley ~I San Luis Valley acre of wetland
(acres)
San Luis/Head Lakes 4,470 2,235 315 945 1.0 1.1 0.42
(180-2,439)
Mlshak Lakes 2,570 1,285 253 759 0.6 0.9 0.59
(540-1,596)
Russell Lakes 3,829 1,915 1,131 3,393 0.8 4.1 1.77
(489-1,845)
Adams Lakes 640 320 38 114 0.1 0.1 0.35
(18-309)
Monte Vista NWR 14,227 6,900 3.861 11,583 3.0 13.8 1.68
-l'- (9,000-13,260)
Total for hlgh-
density breeding
arens 26,345 12,655 5,598 16,794 5.5 20.0 1.33
(11,608-19,575) 1/
Low-density breeding
area 11 805,655 218,345 21.,402 67,206 94.5 80.0 0.31
Total for
San "Luis Valley 832,000 231,000 23,000 84,000 100.0 10.0 0.36
Total "for Closed
Basin projoc.t:
area 2../ 130,000 43,122 /, ,540 13,620 18.6 16.2 0.31

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Breeding pair and area size data taken from Hopper et a1. (197S). Updated by personal communication Ho....ard Funk 1981.
Identific.ation and delineation of 10'....- and high-density breeding areas from Hopper et al. (1975).
Acrenge estimate for high-density areas was bau0.d upon FWS c5th\ate of wetland densities -..;1th Hoppet' et al. (1975) stud)' areas.
AcrcJge for Honte Vista NUR was taken from the t"efuge annual reports which indic.a.ted an averaGe of 6,900 act'es annually
availahle for duck production. ,
Annual production estimat~g assumed SO-percent ncst success and 6 fledglings (class llc-lll) pet brood.
Data supporting these figures came from studies on Monte Vista m;R (Anderson 1967, Pospahala 1969. Schroeder 1972. and Robinson 1971).
Range of production does not include 1964 when San Luis/Head, Mishak. and Adams Lakes were not surveyed by Hopper et a1. (1975).
In 1965 Adams Lllke wus not surveyed~
Includes San Lui:i/Head Lakes from high-density breeding areas; data from Mishak Lakes was not included but an unknown portion
of Mlshak Lakes may be included in w~tlr.nd acrc,lge for" Closed Basin project area.

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