WSP01365

• File Number: 8443.100
• Description: Narrows Unit - Project Description
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/1/1966
• Title: Report on the Narrows Unit Colorado South Platte Division Missouri River Basin Project part 2
• Water Supply Pro - Doc Type: Report/Study

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CONCLUSIONS

As planned, Narr0W5 .Reservolr would Inundate 15.5 miles of the South
Platte River but would Improve fishing In about 5.5 miles of the
river downstream from the dam. The downstream reach would support
about 1,000 man-days of fishIng annually while the reservoir could be
expected to support about 100,000 man-days annually. The project would
produce a net gain of 101,000 man-days of fishing for an annual
benefit of $151,500.

WIth a50-second~footrelease from Narrows Reservoir and with adequate
fishIng access to the South Platte River below Narrows Dam, which
would be provided by the National Park Service's Riverside PublIc Use
Area, an additional 4,000 man-days of fishing for a benefit of $6,000
annually would be realized.

Maintaining Jackson Reservoir and rehabilitating Jackson Reservoir
Dam would provide an additional 10,000 man-days of fishing for a
benefit of $15,000 annually.

Narrows Reservoir would Inundate about 14,963 acres of wildlife habitat,
resulting In a loss of 24,800 man-days of upland-game hunting and the
. product Ion loss of 1,000 ducks annually. A loss of 800 man-days of
sport hunting for other wildlife and 1,100 fur-animal pelts would oc.
cur also. Waterfowl hunting would Increase by 5,600 man-days annually
for a benefit of $25,200. Waterfowl use for wintering and migration
would Increase by.3,OOO,OOO use-days for an. annual benefit of $20,400.
An added benefit of $1,000 from an expected annual 2,000 man-days of
wildlife-oriented recreation also would be realized.

The acquisition and development of lands for a State wildlife manage-
ment area would mitigate the losses stated above and, In addItIon,
would produce 1,500 man-days of upland-game huntIng for a benefit of
$4,500, 6,000 man-days of waterfowl hunting for a benefIt of $27,000,
the production of 3,000 ducks and geese and Increased waterfowl use
amounting to 4,500,000 waterfowl-days annually for an annual benefIt
of $30,600, and 23,000 man-days of wlldllfe-orlented recreatIon for
a benefit of $11,500 annually,

Annual fish and wildlife benefIts attributable to the Narrows Unit
with Inclusion of the proposals as outlined In this report would
amount to $172,500 for fIsh and $120,200 for wildlIfe, for a total
annual benefit of $292,700.