Fifteenth annual Gros Ventre River cooperative spray days held last week


The Jackson Hole Weed Management Association hosted their 15th annual cooperative noxious weed spray days on July 22-24, with the Refuge participating as a cooperator.

July 31, 2014 (NER 14-22)

The Jackson Hole Weed Management Association (JHWMA) hosted their 15
th annual cooperative noxious weed spray days on July 22-24, with the National Elk Refuge participating as a cooperator. Fifty volunteers came from throughout Teton County to team up for invasive weed control along the Gros Ventre River. Organized by Travis Ziehl, Assistant Supervisor at Teton County Weed and Pest District, the group targeted spotted knapweed, Dalmatian toadflax and perennial pepperweed. The invasive weeds treated compete with native vegetation, adversely impacting wildlife habitat and transforming ecosystem function. 

“This was a great opportunity to team up with partner organizations and highlight the importance of managing invasive species across the Greater Yellowstone Area,” said Rachel Daluge, JHWMA President. “Working across jurisdictional boundaries for the betterment of the entire ecosystem is what the JHWMA is all about”.

Crews treated roughly 72 acres of invasive species in a 1,200 acre project area. The project started along Gros Ventre River in the Bridger-Teton National Forest on Lower Slide Lake and continued 16.5 miles downstream on both public and private lands to the confluence of the Gros Ventre and Snake rivers.  

Agencies, organizations and landowners that assisted with the project included Grand Teton National Park, National Elk Refuge, Bridger-Teton National Forest, Teton Conservation District, Teton County Weed and Pest District, Bureau of Land Management, Wyoming Department of State Lands, Jackson Hole Land Trust, Hanna Outfitting, Gros Ventre River Ranch, Fife Property, Serenity Ranch, Bar BC, Gros Ventre Warm Springs LLC, Biolochini Property and Jackson Hole Golf and Tennis. 

“We were so pleased with the large turnout and all of the hard work contributed by everyone. JHWMA members have committed a tremendous amount of time and effort to this project over the last 15 years, and we are seeing some really great progress,” Ziehl said. “This is a prime example of federal, state and county agencies, as well as private stakeholders, teaming up, helping one another, and collectively reducing the spread of noxious weeds in Teton County,”. 

The JHWMA was formed in 1998 to establish common long and short-term management policies, goals, and objectives necessary for cooperatively managing and funding noxious weed activities across all jurisdictional boundaries. 

To learn more about the JHWMA, visit