WSP02963

• File Number: 8443.400
• Description: Narrows Unit - Reports
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 6/1/1976
• Author: US DoI BoR
• Title: Addendum to Definite Plan Report
• Water Supply Pro - Doc Type: Definite Plan Report

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Of that amount, 12,245 acres would have been acquired for the project
and 3,520 acres would have been acquired specifically for wildlife
purposes. Mitigation requirements were based on anticipated annual
losses of 24,800 man-days for upland game hunting, 500 man-days of
other sport hunting, production of 1,000 waterfowl, and 1,lOO pelts.
The provision of the wildlife management area would have fully mitigated
those losses and also provided substantial enhancement benefits. The
associated costs would be proportionately divided, 47.3 percent for
mitigation and 52.7 percent for enhancement. Annual operation,
maintenance, and replacement costs of $37;OOO'would ,be divided, $18,000
for mitigation and $19,000 for enhancement.

The current plan recommended by the Fish and Wildlife Service
includes approximately 27,820 acres of land and appropriate development
to be made available to the Colorado Division of Wildlife for a wildlife
management area. Of that amount, approximately 20,650 acres will be
acquired for the project and 7,170 acres will be acquired specifically
for wildlife purposes. Mitigation requirements were based on the Fish
and Wildlife Service's new habitat evaluation procedures developed for
use in implementing the Water Resources Council's "Principles and
Standards for Planning Water and Related Land Re~ource ~evell?pment."
On that basis, it was determined that 71,924 habltat unlts wlll be lost
as a result of development of'the Narrows Unit.

The recommended wildlife area of approximately 27,820 acres will
mitigate approximately 70 percent of the wildlife habitat units lost.
Consequently, all of the wildlife management area costs will be for
miti gati on.

The Fish and Wildlife Service has concluded that even though all of
the habitat units lost will not be fully mitigated, there will be an
increase in hunting of waterfowl, big game, and other speCies of wildlife.
In addition, there will be an increase in waterfowl use, geese production,
and wildlife oriented recreation. For those categories, the Fish and
Wildlife Service has provided benefits.

Based upon anticipated land acquisition the total lands that will
be available for fish and wildlife and recreation management purposes
will be 25,375 acres. This total includes 7,170 acres to be acquired
specifically as a part of the wildlife management area, 970 acres to
be acquired specifically for recreation purposes, and 17,235 acres to
be acquired for the dam and reservoir. The balance of the lands acquired
will be reserved for operational purposes (1,800 acres) and for the
relocation of roads and railroad (450 acres). Habitat management on
these remaining lands will be permitted to the maximum extent possible.
It is assumed that the resulting wildlife habitat mitigation will not
be significantly different than those estimated in the Fish and Wildlife
Service's November 4, 1975 memorandum.

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