Imperial Reservoir and Martinez Lake, Imperial National Wildlife Refuge (NWR)

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Grebe Survey Summary

Max Adults: presence
Year: 2006 or prior
Most Recent Adults: presence
Year: 2006 or prior
Survey Type: N/A
Most Common Threats Reported: N/A

Lake name:: Imperial Reservoir and Martinez Lake, Imperial National Wildlife Refuge (NWR)
Location:: Arizona
Latitude:: 32.911508
Longitude:: -114.472287
Surface area (km2):: 14.3
Basin type:: reservoir
Dam completion date:: 1938
Management agency:: U.S. Fish and Wildlife Service; Bureau of Reclamation; Imperial Irrigation District
Lake use:: desilting water supply
Region associations:: Colorado River; Southwest Arizona NWR Complex; Cibola NWR
Designations:: National Wildlife Refuge
Comments:: 30 miles along the lower Colorado River. Part of the Southwest Arizona National Wildlife Refuge Complex along with Cibola NWR. Wetlands created with creation of the Imperial Dam in 1938. Imperial NWR includes various lakes and wetlands along the Colorado River so the refuge as a whole is entered seperately from Imperial Reservoir and Martinez Lake.

Surveys (1)

Survey Citation:
Manning, A. 2006. Colony list, unpublished data.

Time period
2006 or prior
Source
Summary
Both Western and Clarks?
Y

Count Type	Range	Max	Year
Max Adults	1 to 100	presence	2006 or prior
Most Recent Adults	1 to 100	presence	2006 or prior
Max Nests	1 to 100	presence	2006 or prior
Most Recent Nests	1 to 100	presence	2006 or prior
Max Chicks	N/A	N/A	N/A
Most Recent Chicks	N/A	N/A	N/A

Comments:

Unpublished data from Ann Manning with the Utah Division of Wildlife, forwarded by Gary Ivey. Ivey said year saved was 2006 but otherwise unknown when this list was determined by Manning, hence year noted as 2006 or prior. This is on a list of known colonies of Western and Clark's grebes. No year nor other info provided.

Sources of Information

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