Rock cross vanes (during construction)
Log cross vane structures
Wetland Restoration (1 year post construction)
NIXON FARM STREAM & MITIGATION
(HOWARD COUNTY, MD)
Maryland State Highway Administration
Construction: September 2010
Planting: October 2010
Estimated Project Cost
In September 2010, Ecotone served as the prime ecological contractor for Maryland State Highway Administration’s Nixon Farm Wetland Mitigation site. The project consisted of restoring approximately 10 acres of nontidal forested and emergent wetland, 800 linear feet of intermittent stream channel, and 9 acres of hardwood forest. Located in Howard County, Maryland, the site serves as mitigation for unavoidable impacts to wetland, stream and forest resources associated with upgrades to MD Route 32.
Prior to restoration, Nixon Farm consisted of a pond with an open pasture and an unnamed tributary to the Little Patuxent River. Ecotone installed highly specialized design items, including log and rock cross vanes, cobble weirs within the wetland cell, earthen plugs, inverted root wads and standing snags. The log and rock cross vanes were installed in the intermittent stream channel to decrease water velocities and dissipate sediment.
Cobble weirs were installed within the existing stream channel to slow velocities and saturate created wetland areas. The inverted root wads and standing snags were set in place to enhance natural habitat for wildlife. In addition, a system of interlocking wooden mats was created to transport materials and equipment to the project area while protecting fragile wetland areas in the process.
- 10 ac of wetland restoration
- 800 lf of stream restoration
- 9 ac of reforestation
- Fine Grading