Swann Street Drainage Improvements Phase I

Last updated Nov. 09, 2018 - 11:50 am
  • Planning
  • Design
  • Construction
  • Completed
  • Storm Drainage System
  • $1.5 million
  • Stormwater Management (Lead)
  • WK Dickson (Design)
  • North State Environmental, Inc. (Construction)

Current Activity

Posted Friday, Nov. 9

Construction for this project started July 25 and will last about six months. This timeframe may vary depending on weather, unanticipated utility needs, and other construction factors. Residents who live directly in the construction area may experience traffic detours as well as temporary disruptions to water, gas, phone, and cable services. 

Work on Varnell Avenue is expected to be complete on Dec. 1. Then, a second construction crew will help complete the work on Swann Street to ensure the project is completed in a timely manner. 

Swann Street may be closed periodically throughout construction. Look for more details over the next month on upcoming closures.

If you have any questions about construction, email David Kiker, PE or call 919-996-4074.


The purpose of this project is to minimize flooding along Swann Street.

This will be done by making improvements to and increasing the size of the stormwater drainage system along the street. The stormwater pipes will increase from 48 to 72 inches in diameter. The new infrastructure also will meet current design standards and will better handle the stormwater runoff in the area.

Storm drains also will be added to Swann Street to capture stormwater runoff from yards and streets.


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.


  • Swann Street Flooding
  • Swann Street Overflow
  • Swann Street Drainage


Project schedule with dates and descriptions
Fall 201670% design plans and finalized easement plans completed
Spring 201790% design plans completed
Summer 2017Drainage easements and environmental permit process complete
Fall 2017Project design complete
Winter 2018Project bid complete
Summer 2018Project construction begins
Winter 2019Project 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.

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