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Carterville FWCO participates in annual on-the-river planning event
Midwest Region, June 11, 2009
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A chevron dike used to create island and side channel habitat in the Mississippi River. Photo credit: U.S. Army Corps of Engineers St. Louis District
A chevron dike used to create island and side channel habitat in the Mississippi River. Photo credit: U.S. Army Corps of Engineers St. Louis District - Photo Credit: n/a

Biologist Nate Caswell recently participated in the U.S. Army Corps of Engineers (USACE) St. Louis District’s annual River Resources Action Team (RRAT) Trip down the Mississippi River.  The RRAT Trip is a floating meeting that alternates between the impounded and unimpounded portions of the St. Louis District.  This year the participants got a chance to see and discuss projects taking place on the unimpounded portion between the Missouri and Ohio Rivers, otherwise known as the Middle Mississippi River (MMR).  This annual event gives river managers and stakeholders an opportunity to discuss USACE channel maintenance and ecosystem restoration issues while actually being on the river to see the projects first hand.  Caswell gave the group a brief update on the status of fish sampling for the Stone Dike Alterations Project, one of the habitat restoration projects planned for the MMR.  Carterville FWCO recently completed three years of pre-project baseline data collection, and is currently waiting for construction to take place. The USACE will use a series of wing dike notches and chevron dikes to create island and side channel habitat in a reach of the MMR where there currently is none.  Chevron dikes are upstream-facing horseshoe-shaped rock structures that create slack water, island, and side channel habitat. Caswell also gave a presentation on some of the lessons learned during this project to the Navigation and Ecosystem Sustainability Program Science Panel.  Lessons learned from this and other projects will allow river resource managers to build on past experiences and improve biological monitoring of future ecosystem restoration projects.


Contact Info: Nathan Caswell, 618-997-6869, Nate_Caswell@fws.gov



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