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Brewery Flats Sediment Plug Removal Draft EA

Restoration & Rehabilitation

Tue Nov 15 13:30:00 MST 2011

The proposed project is located on Big Spring Creek about 1 mile south of Lewistown, MT at the Brewery Flats Fishing Access Site (FAS) The project would involve removal of sediment (gravel and silt) deposited at the interface between a new re-meandered channel constructed in 2000 and a channel straightened in 1912. Due to the deposition, the channel lost about 2 feet of depth for a 100 yard linear distance. As a result, Big Spring Creek is spreading out and flooding the Brewery Flats FAS at base flow. Water is also flooding a downstream outhouse, sections of trail and vegetation. To prevent channel migration and limit further impacts to infrastructure, Montana Fish, Wildlife and Parks (FWP) proposes to dredge the 100 yards of Big Spring Creek to the approximate depth of 2 ft that was present in 2005. FWP proposes to hire a contractor to excavate the approximately 700 cubic yards of silt and gravel with a dump truck and excavator using best management practices. Excavated material would be removed off-site and deposited in an area away from wetlands. Equipment would access the site via the trail and road system. Failure to perform remediation work may result in a channel change at the location, which would have significant adverse impacts to nearby infrastructure, including a road, waterline, trails, FAS parking and a vault latrine. Project Type – Fisheries, Document Type – Environmental Assessment, Agency – Montana FWP, Location: Fergus County

Contact Information

Anne Tews Brewery Flats Sediment Plug EA Montana Fish, Wildlife & Parks PO Box 938 Lewistown, MT 59457

Public Comment

The public comment period for this public notice ended on Thu Dec 15 17:00:00 MST 2011.