This Supplemental Environmental Assessment (EA) has been prepared for the Cherry Creek Native Fish Introduction Project. This Supplemental EA clarifies the original 1998 EA and proposes that Montana Fish, Wildlife & Parks (FWP) have the latitude to use rotenone in Cherry Lake, should the need arise. Treatments in 2003 and 2004 using antimycin did not result in a complete eradication of Yellowstone Cutthroat Trout in the lake as anticipated in the 1998 EA.
*Note - Hardcopies of Appendix B are avaliable by request at:
1400 S 19th Ave.
Bozeman, MT 59718
*Please note the following correction near the top of page 11 of this EA: "The calculation of the antimycin criteria is as follows: (0.0017 (instead of 0.5) mg/kg-day (RfD) * 70 kg (BW)/(2L/day (DI))
Based on a maximum concentration of 12 ppb that will be used in this project, the maximum concentration that would occur in Cherry Lake is 12 micrograms/L, which is 5 (instead of 1,458) times less than the safe level calculated by DEQ. This is the same concentration that has been used in Cherry Lake in 2003 and 2004." (Species Stocking - 06/30/2005)
The plan, put together by a local advisory committee and Fish, Wildlife & Parks, will guide park operations, educational efforts, recreational opportunities, visitor services, community relations, paleontological and natural resource conservation for the next ten years.
(Management Plans - 06/28/2005)
The construction of a gravel pit on lower Hardy Creek has obliterated the natural stream channel. FWP is exploring the possibility of restoring the channel in the abandoned gravel pit. The restoration of the channel would allow Hardy Creek to function as a spawning and rearing area for rainbow trout. However, it is not clear that Hardy Creek has sufficient stream flow to support its functioning as a spawning and rearing area due at least in part to dewatering caused by one major irrigation diversion. The reduction of water usage from this diversion would allow FWP to evaluate the potential for leasing water rights to provide for adequate stream flow if the gravel pit section of Hardy Creek were restored. (Acquisitions, Trades & Leases - 06/27/2005)