DPWES Letters to Industry

Land Development Services
12055 Government Center Parkway
Fairfax, Virginia 22035
703-324-1720, TTY 711

March 2004

Porous Pavement and Other Alternative Pavements

This serves as a reminder that porous asphalt pavement is permitted for use in Fairfax County. Porous pavement is best suited to parking areas that are not subject to frequent heavy loads and muddy conditions. Examples of suitable locations are parking areas for parks, churches, schools, office buildings and shopping centers. When considering porous asphalt for a specific site, the design engineer should pay special attention to address its long term viability and maintenance requirements. Refer to Section 6-1304 of Fairfax County's Public Facilities Manual (PFM) for more information.

The County will also consider the use of other alternate paving surfaces, such as grasscrete and geoblocks. Requests for the use of any grass reinforcement system are evaluated on a case by case basis and would be subject to certain design conditions. Please refer to Section 7-0504.3 of the PFM for information on the use of these alternatives. Also, refer to the Interlocking Concrete Pavement Institute to obtain more information on these systems.

As a related matter, regarding the use of innovative practices for storm water quality purposes, please refer to Section 6-0402.4 of the PFM. To facilitate the use of innovative Best Management Practices (BMP's), the County issued a Letter to Industry #01-11 (PDF) on October 2, 2001 which details the procedures to follow if you want to submit a request to use innovative BMP's. The letter also refers to a document entitled Guidelines for the Use of Innovative BMP's (PDF). You are encouraged to review these documents as you design your next project. If you have any questions, you may contact the Code Analysis Division at 703-324-1720, TTY 711.

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