WSP01589

• File Number: 8240.200.10.H
• Description: UCRBRIP Stocking
• Basin: Colorado Mainstem
• Date: 4/11/1994
• Author: UCRBRIP
• Title: Interim Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin
• Water Supply Pro - Doc Type: Publication

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Table 1.

Locations/situations where nonnative fish species can be stocked
on a routine basis. Appendix A discusses the rationale for
concluding that stocking these species/locations/situations are
consistent with recovery of the endangered Colorado River fishes.
Appendix A also provides a map delineating critical habitat and
the 6,500 foot mean sea level contour line.

Species

all salmonids currently in
the basin (family Salmonidae)

triploid grass carp
(Ctenooharvnaodon idella)

Location/Situation
all waters in the upper basin.

redside shiner
(Richardsonius balteatus)

threadfin shad
(Dorosoma oetenense)

triploid fish (certificate of triploidy
required prior to stocking).
isolated2 ponds and reservoirs within
critical habitat above the 40 year
floodplain3;
ponds which are screened4 to prevent
escapement;
isolated ponds or reservoirs or screened
connected ponds or reservoirs at or below
6,500 feet mean sea level located at least
5 vertical feet above the ordinary high
water lines of waters that are not
designated as critical habitat.
isolated ponds or reservoirs located above
6,500 feet mean sea level.

lakes and ponds above Flaming Gorge Dam.

Lake Powell.

2 isolated refers to waters with no surface connection to other waters.

3 The 40 and 100 year floodplains related to critical habitat will be
mapped and made available to interested parties by October 1994.

4 Screened based on State requirements.

5 5 feet above OHW approximates an elevation of 50 to 100 year flood
events based on the professional opinion of FWS hydrologists. This value will
be adjusted during the next 6 months based on the results of site-specific
hydraulic and hydrologic investigations.

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