Friday, March 23, 2012

12th Street Green Alley Project Update

Project Location
The Department of Public Utilities' 12th Street Green Alley project involved retrofitting the existing 12th St. alley surface utilizing low impact development (LID) or “green” technologies. The LID practices implemented in the alley included a permeable paver system and an underground infiltration trench/underdrain system that provides stormwater runoff treatment and storage before being discharged into the city’s combined sewer system.

This new surface work required that all existing underground utilities and infrastructure (water, sewer, gas, city streetlight power, private utilities, etc.) be upgraded and/or replaced as needed. This effort minimized disruption in the alley and prevented future disturbance by performing all necessary work at one time. 

Utilizing LID technologies for municipal
stormwater and surface improvements is a new initiative being undertaken by the city. This project was one of two demonstration projects -- 5th St. Green Alley was the first -- being used to build a case for targeted citywide implementation of “green” development in Richmond and other urban areas in the Chesapeake Bay watershed.

Funding for this project came from the city's Wastewater and Stormwater utilities. The surface retrofit was funded by the city and a matching grant from the National Fish and Wildlife Foundation.

DPU installed new underground systems for water, gas, sanitary sewer, storm sewer and power lines for the city's streetlight system. Verizon installed private utility lines within the alley.

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