Brockton Drive Dam Rehabilitation

We are replacing the structure at the lower dam on Brockton Drive Lake with a roller-compacted concrete structure. The project addresses dam safety concerns, reduces the frequency and severity of flooding, and improves water quality.

Project Details

Type:: Lakes, Streams, and Dams
Budget:: $4.2 million
Project Lead:: Stormwater Management
Contractors:: CDM Smith, Inc. (Design), Thalle Construction (Construction)

Construction to the lower dam started January 6. We've closed Brockton Drive until construction is complete in early 2021. Residents will still have access to their homes.

Thalle Construction is using a drone to gather survey information over the lakebed. You may see a drone periodically flying over the construction area. Footage will be of lake boundaries only; not properties surrounding the lake.

Note: If you live near the construction fence - place garbage cans on the left side of the entrance for pickup during construction.

Detour

The road will be closed to all traffic between Bayliner Drive and Gentilly Place. Detour signs are rerouting traffic around the construction area through Whitehall Avenue, Hoyle Drive, and E. Millbrook Road.

Work Hours

Crews will work Monday - Friday from 7:30 a.m. - 5:30 p.m.
There is no work scheduled on the weekend (unless approved by the City of Raleigh).

The Lake

We've drained the lake since the dam is not functioning right. This will limit the amount of water in the lake and reduce impacts during heavy rainstorms. Crews also have:

Added silt fences to prevent sediment from leaving the construction site; and,
Cleared trees in the construction area.

Next Steps

The contractor will be installing a temporary cofferdam. This will be done before moving forward with the construction at the lake. Right now, they are re-designing the cofferdam using a more practical approach. This change will add some more time to the construction schedule.

Schedule

Date	Activity
Fall 2018	Phase 1 construction complete
Spring 2019	Phase 2 design complete
Summer 2019	Phase 2 construction bid and permitting process
Winter 2020	Phase 2 construction begins
Winter 2021	Phase 2 construction complete

History

The existing spillway for the upper lake at Brockton Drive was in very poor condition. The upper lake collected debris and flooded nearby homes during heavy rainstorms. The lower lake dam spillway is too small and there is severe erosion at the outlet of the pipe.

Phase One

The project included replacing stormwater drainage and sanitary sewers, and transforming the upper lake to a stream channel. The stream channel flows through the newly constructed stormwater infrastructure into the lower lake. These changes will improve the channel's water quality and reduce flooding to nearby homes.