brentwood today stream

Water and Sewer

Brentwood Today Stream Stabilization

We repaired 350 feet of the stream to improve water quality and limit future erosion at a stream on Greywood Drive.

Project Details

 
Type:
Lakes, Streams, and Dams
Budget:
$850,000
Project Lead:
Stormwater Management
Contractors:
HDR Engineering, Inc. of the Carolinas, Credence Inc.

Contact

 

Veronica High, PE
Stormwater Administrator
919-996-4018

Lead Department:
Engineering Services
Service Unit:
Stormwater

Subscribe

 

Planning

This phase is complete.

Phase Contacts

 

Veronica High, PE
Stormwater Administrator
919-996-4018

Lead Department:
Engineering Services

Design

This phase is complete.

Phase Contacts

 

Veronica High, PE
Stormwater Administrator
919-996-4018

Lead Department:
Engineering Services

Construction

This phase is complete.

Phase Contacts

 

Veronica High, PE
Stormwater Administrator
919-996-4018

Lead Department:
Engineering Services

Complete

Construction for this project is complete. Work started upstream to make improvements to the stream channel that runs along Greywood Drive. 

  • The stream channel was reshaped and soil was leveled to gradually raise the stream bed to a more natural, functional point while reducing the amount of sediment (sand and gravel) downstream.
  • This also transforms the energy of the stream and limits future stream erosion.
  • Vegetation was planted in the stream to help stabilize it and provide habitat for wildlife. 

Next Steps

 

The project is under warranty until early 2020. Residents are responsible for maintaining their yard as they did prior to the project. The City will be maintaining portions of the stream that were repaired. 

Phase Contacts

 

Veronica High, PE
Stormwater Administrator
919-996-4018

Lead Department:
Engineering Services

Background

Brentwood Today Lake has a failing spillway, and over the years the concrete spillway sections along the stream have failed and fallen off. The spillway is significantly shorter with only approximately 10 feet of the channel left. A floodplain study of the New Hope Tributary was completed in order to determine the extent of flooding that takes place along the stream. Following the study, the City determined that a stream stabilization would help reduce some of the impacts from the failing infrastructure. 

 

Brentwood Today Lake is classified as a small, high-hazard dam with North Carolina Dam Safety and the remaining portion of the dam is no longer working. This resulted in an existing lake bed forming a main stream channel and an area of natural plants downstream of the lake. Due to that change, the channel has weakened significantly and has very steep, unstable channel banks in some areas.

Schedule

Date Activity
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
Late Fall 2018 Project construction complete (Planting to take place in winter 2019; warranty period ends fall 2019)