Brentwood Today Stream Stabilization
- Stream Stabilization
- Stormwater Management (Lead)
- HDR Engineering, Inc. of the Carolinas
Posted Thursday, Dec. 14
Completed design plans were submitted and approved by the City's Development Service Department in October 2017. The project is currently being bid for construction. Once the construction bid and contract have been approved, construction is anticipated to begin in Winter 2018.
Brentwood Today Lake is classified as a small, high-hazard dam with the North Carolina Dam Safety Division. The last remaining portion of the Brentwood Today Lake spillway failed the weekend of March 3, 2012. This resulted in an existing lake bed forming a main stream channel section and an area of natural vegetation. Due to that change, the downstream channel invert has undercut significantly and has very steep, unstable channel banks in some areas.
The City of Raleigh, along with HDR Engineering Inc. of the Carolinas, will analyze the existing conditions of the breached dam and the downstream channel. A grade control feature will likely be necessary at the old dam location to address the difference in elevation caused by stream undercutting over the years.
|Winter 2016||Project planning completed|
|Fall 2017||Project design finalized and easement negotiations, permitting, and coordination of private utility relocations complete|
|Winter 2018||Project construction begins|
|Spring 2018||Project construction complete|
Brentwood Today Lake has a failing spillway and over the years, the concrete spillway sections have failed and fallen off. The spillway is significantly shorter with only approximately 10 feet of spillway left. So, a floodplain study was completed of the New Hope Tributary in order to determine the extent of flooding that takes place along the tributary.