Swann Street Drainage Improvements Phase I
- Storm Drainage System
- $1.5 million
- Stormwater Management (Lead)
- WK Dickson
Posted Monday, Nov. 6
Necessary permits for this project have been received. Design plans were reviewed by the City's Development Services Department in September, which are expected to be finalized by the end of 2017 with a construction bid taking place in December. The City is currently finalizing the easement acquisition process for this project, which is expected to be complete in January 2018. Private utility relocations will take place in January prior to construction beginning in early 2018.
The primary project goals are to eliminate roadway flooding in the 10-year flood event and to minimize any flooding to insurable structures within the project area.
Phase I design plans are intended to make proposed drainage improvements while ensuring that erosion in this area does not get worse. Bank stabilization to minimize erosion and property loss will be addressed in Phase II of this project. Proposed solutions include using several boulder cross vanes to reduce the slope and velocities of the stream channel and adding a large concrete vault with a four foot drop to help reduce the strength of storm flows.
|Fall 2016||70% design plans and finalized easement plans completed|
|Spring 2017||90% design plans completed|
|Summer 2017||Drainage easements and environmental permit process complete|
|Fall 2017||Project design complete|
|Winter 2018||Project bid complete|
|Spring 2018||Project construction begins|
|Fall 2018||Project construction complete|
The Stormwater Management Division completed a drainage basin study in 2013 for the Swann Street area. Recommendations were provided to reduce the frequency of flooding, roadway and driveway overtopping, and complete bank erosion stabilization. Raleigh City Council approved the design phase of the Swann Street Drainage Improvement Project – Phase I in July 2015. This project will be divided into two phases with Phase I focusing on the downstream improvements and Phase II on the upstream improvements.