Rock Creek Green Infrastructure Project C

Alley Permeable Pavement


We want your input! Rock Creek Project C Public Comment Period is open!
Public Comment Period: April 5 - May 10, 2024. Click here for the Project Description Document.
Virtual Public Meetings:  April 8 & May 6, 2024 (Links to join meetings below)

Rock Creek GI Project C

DC Water is excited to announce the next green infrastructure (GI) project in the Rock Creek sewershed, Rock Creek Project C!  DC Water’s Rock Creek Project C is currently in the planning/design phase. A draft project description document is available for public comment through May 10, 2024.  Comments should be submitted to

Click below for document for public comment:

Rock Creek Project C Description

Virtual Public Meetings

During the public comment period, DC Water will host two virtual public meetings: April 8 and May 6 at 6:30 pm. Meeting information is below.

April 8, 6:30 PM

Join meeting at: Rock Creek Project C Public Meeting #1 
Meeting Presentation - PDF

OR Call In (audio only):  202-753-6714 / Phone ID: 957 378 52#

May 6, 6:30 PM

Join meeting at: Rock Creek Project C Public Meeting #2

OR Call In (audio only):  202-753-6714 / Phone ID: 540 013 310#


Rock Creek Project C is part of DC Water's Clean Rivers GI Projects. It is the third green infrastructure (GI) project constructed in the Rock Creek sewershed. The first and second green infrastructure projects, Rock Creek Project A and Rock Creek Project B, were completed in 2018 and 2023, respectively. DC Water’s Clean Rivers Projects will significantly reduce the level of pollution to the District’s waterways produced by the discharge of stormwater runoff and sanitary sewer flows, known as combined sewer overflows (CSOs).

Rock Creek Project C is designed to meet a requirement to manage 1.2” of stormwater runoff from at least 25 impervious acres. This requirement will be achieved through the construction and implementation of permeable pavement within alleyways. Rock Creek Project C GI facilities will be located in the public right-of-way in eight project areas throughout the Rock Creek sewershed of Ward 4 (see image below showing the project areas and the corresponding factsheets that provide additional information regarding the proposed sites). Project areas were selected for their feasibility of design and construction, cost-effective implementation, and ability to meet the required stormwater volume capture. GI facilities in this project will not be located on Federal properties or sensitive historical or archeological sites.

Rock Creek Project C includes the construction of alley permeable pavement sites. The main image above shows an example of previously constructed alley permeable pavement. Permeable pavement allows stormwater runoff to infiltrate through the pavement and into the ground and slowly releases any excess stormwater runoff into the combined sewer system. 

Rock Creek Project C Project Areas 



Rock Creek Project C Factsheets

RCC Factsheet Area 4E-2.pdf
RCC Factsheet Area 4E-1.pdf
RCC Factsheet Area 4D-1.pdf
RCC Factsheet Area 4C-1.pdf
RCC Factsheet Area 4B-4.pdf
RCC Factsheet Area 4B-3.pdf
RCC Factsheet Area 4B-2.pdf
RCC Factsheet Area 4B-1.pdf



Activity Date
Construction Begins Early 2025
Rock Creek Project C Completion December 2027


To ensure continued performance of GI and the associated reduction of combined sewer overflows, the GI facilities will be maintained regularly.  DC Water is responsible for maintenance of GI facilities. Facility IDs will be placed at each GI facility that DC Water constructs in your neighborhood and you can contact DC Water if you notice trash or other issues in the facilities.

Discover More

Click here to learn more about DC Water's green infrastructure projects.

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

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Upcoming Meeting
April 23, 2024
Tuesday, 1:30 PM