WSPC04984

• File Number: 8541
• Description: San Luis Valley Project
• State: CO
• Basin: Rio Grande
• Water Division: 3
• Date: 3/30/1981
• Author: Robert H Weimer
• Title: San Luis Valley Project Closed Basin Division - 1980-1981 - Results of Mitigation Meeting of March 10, 1981 and proposed Mitigation Plan for the Closed Basin Division
• Water Supply Pro - Doc Type: Report/Study

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000981

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Basic Elements of B,S Mitigation Presentation for the
Closed Basin Division, San Luis Valley Project, Colorado,
Excluding Blanca Wildlife Habitat Area
(March 10, 1981, Denver, Colorado)

PREDICTED IMPACTS

Adverse effects to wetlands:

Total

4,920 acres channel interference
100 acres construction
3,258 acres drawdol.1fi in high infiltration areas
8,258 acres wetlands

Adverse effects to vegetation:

Total

8,534 acres in 0-5 ft. water table, 25% factor
2,154 acres in 5-10 ft. water table, 5% factor
10,685 acres vegetation

Losses of waterfowl production:

e.g., 2,560 ducks per season

Losses of other bird use:

330,320 use-days per season (approximately 30% sandhill cranes)

MITIGATION

Wetlands: (a) Improve I, 500 acres on northern portion of Alamosa NWR with
2,300 acre-feet per year of project division water (channel
turnout);

(b) .Improve 2,874 acres on middle and southern portions of Alamosa
NWR with 3,000 acre-feet per year of project division water
(channel turnout);

(c) Improve 1,590 acres in the Head/San Luis Lakes area with
7,240 acre-feet per year of project division water (borrowed
water from wellfield - not all consumptively used); and

(d) Improve 2,294 acres in the Russell Lakes area with acquisition
of 3,120 acres of private lands and appurtenant water rights.

Vegetation: (a) Improve 3,485 acres on northern portion of Alamosa NWR
(peripheral areas, 4,646 acres with 75% factor);