Walnut Creek Gravel Wetland

We installed a gravel wetland at Walnut Creek Wetland Park. The wetland includes:

An underground gravel reservoir that'll hold and filter stormwater runoff;
Plant roots that will soak up and clean the water; and,
Slowing down the flow of stormwater before it reaches Walnut Creek.

GSI Address: 1005 Peterson St, Raleigh, NC 27610

Project Details

Type:: Stormwater
Budget:: $350,000 (design & construction)
Project Lead:: Stormwater Management
Contractors:: Hazen and Sawyer (Design); Lanier Construction Company (Contractor)

Contact

Heather Dutra
Water Quality Supervisor
heather.dutra@raleighnc.gov
919-996-4012

Lead Department:: Engineering Services

Participating Department:: Parks, Recreation and Cultural Resources

Gravel Wetland Educational Display

Schedule

Date	Activity
Fall 2018	Project design began
Winter 2020	Project design complete
Spring - Fall 2020	Construction bid process
Winter 2021	Project construction phase begins
Fall 2021	Project construction complete

Background

The 5,300-square-foot wetland will capture stormwater runoff coming from Peterson Street and other nearby streets, sidewalks, and buildings (about one acre of impervious surface). Wetlands are a very effective way to treat stormwater runoff. The area is expected to prevent approximately 8 pounds of excess nitrogen and 135 pounds of suspended solids from polluting waterways each year.

Learn more about green stormwater infrastructure.

This project was partly funded by a grant from the NC Department of Environmental Quality. The grant covered some construction costs and educational art at the gravel wetland.