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Brennan’s Wave – Missoula, MT
In March 2006, Envirocon completed work on Brennan’s Wave, a whitewater kayak park in downtown
Missoula, Montana, on the Clark Fork River. The whitewater park was developed in honor of Brennan Guth,
a world-class Missoula kayaker who died in a boating accident in Chile in 2001.
The Missoula Whitewater Association led the Brennan’s Wave project, with support and donations from
various government and private agencies. The Dennis and Phyllis Washington Foundation donated
$20,000 to the project, while Envirocon and its sister company Modern Machinery donated services and
equipment valued at $100,000.
The Brennan’s Wave project was designed to replace an existing irrigation diversion in the Clark Fork River
that was failing. To complete the project, Envirocon crews first demolished the broken-down concrete diversion dam.
Coffer dams were then constructed to divert water from the in-river construction site, and large boulders were placed
and grouted to form a new weir. Envirocon constructed a new diversion that maintained flows to the irrigation channel,
thus creating several play waves that would function at various water flows while maintaining fish passage in the river.
The whitewater kayak structure was in use the first day the coffer dams were removed, and has seen a steady stream of
kayakers since.
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