Swann Street Drainage Improvements Phase I

Last updated Dec. 20, 2018 - 12:01 pm
  • Planning
  • Design
  • Construction
  • Completed
  • Storm Drainage System
  • $1.5 million
  • Stormwater Management (Lead)
  • WK Dickson (Design)
  • North State Environmental, Inc. (Construction)

Current Activity

Posted Thursday, Dec. 20

Work on Varnell Avenue is almost finished. New curb and gutter will be put along Varnell Avenue in early January and asphalt for the road (which is temporarily covered with gravel) will be installed when weather permits. The contractor also is replacing large culverts/pipes along Swann Street. 

Although we expected to finish this project in the winter, there is a slight delay in construction due to weather conditions and site challenges. Thank you for your continued patience. We expect to finish the project in the spring. 

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

Summary

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.

Sustainability

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.

Images

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

Schedule

Project schedule with dates and descriptions
DateDescription
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
Spring 2019Project construction complete

History

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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