Continental Divide Cooperative Weed Management Area

The mission of the Continental Divide Cooperative Weed Management Area  (CDCWMA) that covers land in Clark, Lemhi,  Butte, and Jefferson Counties is to bring  together all those responsible for weed control within the boundaries of the CWMA to develop common weed control  management objectives and to coordinate efforts along  logical geographic boundaries based on similar land types and use patterns; also to prevent the introduction, reproduction and spread of designated noxious weeds and  invasive exotic plants into and within the entire CWMA; and to educate land managers and the general public about invasive noxious weeds and the efforts to control them. The  partners of the CWMA will:

  • Foster cooperation, communication, and teamwork
  • Increase the general awareness of  the weed problems in the CWMA
  • Develop and maintain a map data base of weed infestations
  • Prevent the establishment of noxious/invasive plants not currently in the CWMA
  • Contain, control, and/or eradicate  noxious weeds already in the CWMA
  • Establish noxious weed-free corridors along right of ways and riparian areas
  • Rehabilitate areas of former infestations
  • Assist partners and cooperators in using Best Management Practices in an  integrated approach to weed control

The CDCWMA’s approximately 1,902,500  acres include all of Cl ark County, a portion of  Lemhi County and Butte County in the Birch  Creek drainage, and the Mud Lake area of  Jefferson County. It is bordered on the north by  the state line and continental divide and Gilmore Summit, the east by the Fremont County line, the  south roughly by state highway 33, and the west roughly by state highway 33 and the top of the Lemhi Mountain Range. Thirty-one percent is private land, 25% is forest, 31% is BLM,  6% is state lands, and 7% is other federal  lands, including the Camas National Wildlife  Refuge, the US Sheep Experiment  Station, and a portion of INL.

Weed Superintendents

  • Lemhi County
    • Jeremey Varley, Webmaster  
    • 200 Fulton St.
    • Suite 201     
    • Salmon, Idaho 83467
    • Office Phone: 208-756-2815 ext. 282         
    • Fax: 208-756-6915     
    • Cell: 208-993-0950
  • Butte County
    • Brad Gamett, Executive Board       
    • PO Box 832         
    • Arco, Idaho 83213
    • Office Phone: 208-527-8595     
    • Fax: 208-527-3469     
    • Cell: 208-589-0656
  • Jefferson County
    • Mitch Whitmill   
    • PO Box 268       
    • Roberts, Idaho 83444
    • Office Phone: 208-745-9221     
    • Fax: 208-228-6055     
    • Cell: 208-390-3125  

County Contact Information

  • Clark County Extension Office
    • Address: P.O. Box 65 
    • 420 W. Main - Clark County Annex Building
    • Dubois, ID  83423-0065
    • Phone:(208) 374-5405
    • Email:
    • Web Address:
  • Lemhi County Extension Office
    • Address: 200 Fulton Street 
    • Suite 202
    • Salmon, ID 83467
    • Phone: (208) 756-2815 ext. 284
    • Fax: (208) 756-6915
    • Email:
    • Web Address:
  • Butte County Extension Office
    • Address: P.O. Box 832 
    • 159 N. Idaho St.
    • Arco, ID 83213-0832
    • Phone: (208) 527-8587
    • Fax: (208) 527-3036
    • Email:
    • Web Address:
  • Jefferson County Extension Office

Contact Continental Divide Cooperative Weed Management Area

Bo Billman
Clark County Weed Superintendent
PO Box 65
DuBois, Idaho  83423
Phone: 208-374-5121
Cell Phone: 208-709-6706
Fax: 208-374-5705


Service Area

Services provided in:
  • Butte County, Idaho
  • Clark County, Idaho
  • Jefferson County, Idaho
  • Lemhi County, Idaho

To request additions or corrections to this entry email the Administrator