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Programs & DataConservation and ManagementCentral Valley MonitoringSacramento Valley Tributary MonitoringMokelumne River Fish Hatchery
Hatchery Pages

CDFW Fish Hatcheries

Mokelumne-River Fish Hatchery


Mokelumne River Fish Hatchery

Mokelumne River Hatchery
  • About
  • Operations Plans
  • Fish Releases
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Background

The Mokelumne River supports Central Valley fall-run Chinook salmon (Oncorhynchus tshawytscha) (fall-run), which is the only salmon run known to naturally occur in this waterway (Clark 1929). Fall-run are listed as a Species of Concern under the federal Endangered Species Act (NMFS 2004).The Mokelumne River Hatchery (MOK) conducts artificial propagation of fall-run to enhance economically important commercial fisheries and popular sport fisheries in the ocean and rivers of California.

Camanche Dam, which impounds Camanche Reservoir is the upper limit of anadromous fish migration in the Mokelumne River. East Bay Municipal Utility District (EBMUD) initiated construction of Camanche Reservoir in 1963. As mitigation for blocking access to spawning grounds for salmonids, EBMUD provided funding for the original construction of the MOK in 1964.The MOK is located on the south bank of the Mokelumne River at the base of Camanche Dam. While EBMUD provides funding for fall-run production, the California Department of Fish and Wildlife (CDFW) administers and operates the hatchery. The Commercial Salmon Stamp Fund provided funding for an additional MOK building built in 2002 and continues to financially support the MOK. On an annual basis the MOK produces fall-run for mitigation (Mitigation Element) and for ocean salmon enhancement (Ocean Enhancement Element). The annual MOK production goal is 6,400,000 fall-run smolts (3,400,000 for Mitigation Element and 3,000,000 for Ocean Enhancement Element). The MOK receives requests from researchers to produce small numbers of fall-run smolts for special studies (Special Studies Element). Special Studies Element production is separate from Mitigation and Ocean Enhancement elements and varies in quantity annually or may not occur.

References
Clark, G. H. 1929. Sacramento-San Joaquin Salmon (Oncorhynchus tschawytscha) Fishery of California. Division of Fish and Game of California, Bureau of Commercial Fisheries, Fish Bulletin No. 17. 73 pp., 32 figs.

NMFS (National Marine Fisheries Service). 2004. Endangered and Threatened Species; Establishment of Species of Concern List, Addition of Species to Species of Concern List, Description of Factors for Identifying Species of Concern, and Revision of Candidate Species List Under the Endangered Species Act. Federal Register / Vol. 69, No. 73 / Thursday, April 15, 2004
Spawning and Release Protocols

2018/2019 Mokelumne River Hatchery Chinook Salmon Spawning and Release Protocol

2018/2019 Mokelumne River Hatchery Steelhead Salmon Spawning and Release Protocol

These documents describe the following for Mokelumne River Hatchery:
  • Prioritized production goals for the 2018-2019 spawning season for fall-run Chinook salmon and steelhead trout.
  • Broodstock Collection and Spawning Plans
  • Release Strategy

Mokelumne River Hatchery Release Notifications
Select the "Mokelumne River Fish Hatchery" category and year to filter the data listing.
Hatchery Data
View by Category
 
 
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    File Date Size  
FRH - Spring-run Chinook Salmon Release Notification 03-16-2023 03/15/2023 10:36 120 K DOWNLOAD
NIM- Steelhead Release Notification 1-18-2023 02/06/2023 08:31 110 K DOWNLOAD
FRH - Steelhead Release Notification 02-06-2023 02/06/2023 08:30 827 K DOWNLOAD
MOK - Steelhead Release Notification January 23, 2023 02/06/2023 08:30 383 K DOWNLOAD
FRH - Fall-run Chinook salmon release notification May 19, 2022 05/25/2022 08:48 382 K DOWNLOAD
FRH - Fall-run Chinook salmon release notification May 22, 2022 05/25/2022 08:48 382 K DOWNLOAD
FRH - Fall-run Chinook salmon release notification May 25, 2022 05/25/2022 08:46 383 K DOWNLOAD
NIM - Fall-run Chinook Salmon Release Notification May 26, 2022 05/25/2022 08:45 382 K DOWNLOAD
MOK - Fall-run Chinook Salmon Release Notification May 25, 2022 05/25/2022 08:44 384 K DOWNLOAD
MOK - Fall-run Chinook Salmon Release Notification May 24, 2022 05/25/2022 08:44 383 K DOWNLOAD
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Fish Trapped Summary By Week

MOK Fish Trapped Summary By Week - 2016/2017.pdf

Contact Information

25800 North McIntire Road, Clements, CA 95227
(209) 759-3383
Mokelumne River Hatchery
2018 by CalFish
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