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Tryon / Bank Storm Drainage Improvement Project

The Tryon/Bank Storm Drainage Improvement Project reduced the flooding of streets and structures by improving the existing storm water conveyance system from South Tryon Street to the system outlet on the west side of Bank Street. The system was designed and built to accommodate increased storm water runoff due to construction of the CATS bus and rail maintenance facilities in the area between South Tryon Street and South Boulevard, south of Foster Ave., as well as increased runoff due to anticipated development in the vicinity of the proposed New Bern (Light Rail) Station. Construction on this project was completed in December 2004.

Project area map.

Objectives:
- Reduce flooding of South Tryon Street and nearby structures by upgrading the underground storm water conveyance system.
- Accommodate increase in storm water runoff due to construction of the CATS bus and rail maintenance facilities and other development that is expected to take place in the vicinity of the proposed New Bern Station following construction of the light rail system.

Cost: $1,600,000
Note that this figure includes all costs associated with the project such as planning and design, utility relocation, consultant fees, construction, permitting and landscaping.

The Charlotte Storm Water Services (CSWS) project team managed the Tryon/Bank Project. Efforts were made throughout the course of the project to keep affected businesses and residents informed, and to solicit information from the businesses and residents that was helpful to the design process.

Planning Phase (Completed August 2003)
City staff worked with USInfrastructure, Inc. (USI) to plan improvements in the Tryon/Bank project area. Problem areas were identified through a review of citizen calls to 704-336-RAIN and responses to a neighborhood questionnaire. Potential flooding in additional areas was identified through analyses by USI of the drainage system. USI developed alternative solutions to address the problem areas and alleviate flooding.

Design Phase (Completed February 2004)
Detailed construction drawings were prepared for the project as well as easement exhibits for each property owner directly affected by the construction. Numerous details were finalized, including pipe sizes and alignments, inlet sizes and locations, utility relocations, landscape changes, and easement requirements.

Permitting Phase (Concurrent with Design Phase)
During the permitting phase, water quality permits and certifications were obtained from Federal and State agencies. Permit applications were submitted to the North Carolina Department of Environment and Natural Resources and the US Army Corps of Engineers. An erosion and sediment control plan was submitted to the North Carolina Department of Environment and Natural Resources, Division of Land Resources. A right-of-way encroachment application was submitted to the North Carolina Department of Transportation.

Property Easement Acquisition Phase (Completed June 2004)
The City's real estate staff worked directly with affected citizens to acquire temporary and permanent easements for the project. Affected property owners were asked to grant easements to allow the City to access their properties for construction of the improvements and to conduct future maintenance of the drainage system.

Bid Phase (Completed March 2004)
During the bid phase, construction plans were provided to qualified contractors for the preparation of construction bids. The City follows North Carolina regulations governing the bidding process; the lowest responsible bidder was selected to construct the project.

Construction (Completed December 2004)
Construction began in April 2004 and was completed in December 2004. Replacement of the culvert at Tryon Street, originally intended to be part of this project, was eliminated from the project due to permitting issues, and the need to have the remaining system improvements completed in time for occupation of the CATS Bus Maintenance Facility. Because South Tryon Street is a state-maintained roadway, the state is responsible for any improvements to the South Tryon Street culvert. Project objectives were met by construction of the system improvements.

Project Team

William Harris, E.I.
City Project Manager
704-353-1147

Matthew Gustis, P.E.
City Engineering Team Program Manager
704-336-6183