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56 



3. Kashingtcn. 



a. U.S. Fish and Wildlife Service 

 Turnbull Naticxial Wildlife Refuge 

 Cheney, WA 99004 



b. U.S. Fish and Wildlife Service 

 Ridgefield Natiavil Wildlife Refuge 

 Ridgefield, WA 98642 



c. Ihe Nature OcMTservancy 

 Washington Field Office 

 1601 Second Ave. , Suite 910 

 SeatUe, WA 98101 



d. Private landowners. 



C. Management respGnsibility: As outlined under specific 

 landowners. 



D. Easements, ocnservaticn restricticns, etc.: In Mcxitana, Ihe 

 Nature Conservancy has recently purchased land containing a 

 majority of the Swan River Oxbow (005) site in Lake County, and 

 will manage it as a preserve. TVro pojxilaticMTS on private land in 

 the Lindber^ lake area (041, 042) in Missoula Ccxinty have been 

 designated as registry (voluntary protection) sites in 

 cooperatican with The Nature Conservancy. In Idaho, the 

 occurrence in Latah County is cai property which hcis been willed 

 to the Audubon Society for eventual designatic»n as a wildlife 

 sanctu2iry. In Weishington, the occurrence on the Ridgefield 

 National Wildlife Refuge in Clark County is proposed for 

 inclusion in the Blackwater Islands Research Natural Area. Ihe 

 Dishman Hills site in Spokane County has been acquired by Ihe 

 Nature Conservancy, and will be transferred to the D^sartJtient of 

 Natural Resources. It will be within the Dishman Hills 

 Conservation Area. One additicx^l site in Washington has been 

 prcposed for inclusic»i within the Washington Register of Natural 

 Areas, a voluntary landowner protection program (J. Garoon, pers. 

 cdinii. ) . 



10. Manctgemi^it practices axvl experieroe. 



A. Habitat management. 



1. Review of past management emd lauid-use experiences: Nc»>e 

 known. 



2. Performance under changed conditions: No detailed data 

 available. Despite the fact that H. acfuatilis occurs over a 

 large geographic eirea, it is ecologically restricted to a 

 narrowly defined aquatic habitat. Thus, any direct ijopacts 

 on its habitat are more likely to cause the extirpation of 

 disturbed peculations. The species does not appecu: to be 

 capable of colcmizing disturbed habitats. 



