Article XIII, Sec. 13-105 and 13-107
Dimensional standards
Servicing
- Geographic extent
- All land within the corporate limits of the city is designated as a Chesapeake Bay Preservation Area (CBPA). The CBPA is divided into resource protection areas (RPAs) and resource management areas (RMAs).
Uses
Permitted by right3
- conservation or preservation of soil, water, vegetation, fish, shellfish, and other wildlife
- passive recreational activities (fishing, bird watching, hiking, boating, horseback riding, swimming, canoeing)
- educational activities and scientific research
Conditional / special use7
- repair and maintenance of existing piers, walkways, observation decks, wildlife management shelters, boathouses, and similar water-related structures
- boardwalks, trails, and pathways
- historic preservation and archeological activities
- repair and maintenance of existing flood control and stormwater management facilities
- new or expanded water-dependent facilities
- redevelopment
- public flood control and stormwater management facilities
Extracted standards
5 individual requirements pulled out of this section’s prose, each with the sentence it came from.
Other
- Land disturbance threshold for exemption2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
Land-disturbing activities less than 2,500 square feet not part of a larger common plan of development or sale, except as may be required in section 13-107 for CPBA;
- No increase in imperviousImpervious coverageThe share of a lot covered by anything water cannot soak through — roofs, drives, patios. cover for redevelopment0 pct
There is no increase in impervious surface cover;
- RPA buffer width100 ft
A buffer area of 100 feet (measured from top of bank) located adjacent to and landward of the components listed in subsections (1) through (3) above and along both sides of any water body with perennial flow.
- Single-unit residence exemption1 acresacre43,560 square feet — about the size of an American football field without the end zones.
Single-unit residences separately built and disturbing less than one acre and not part of a larger common plan of development or sale, including additions or modifications to existing single-unit detached residential structures are exempt from the water quality requirements of sections 109(E)(3) and (E)(4) except the Alexandria water quality volume default requirement in section 13-109(E)(5) still applies.
- Alexandria water quality volume default0.5 inches
The volume equal to the first 0.5 inch of runoff multiplied by the total impervious area of the site as defined herein.
From the ordinance
All land within the corporate limits of the city is designated as a Chesapeake Bay Preservation Area (CBPA). The CBPA is divided into resource protection areas and resource management areas. The regulations set forth in this Article XIII shall apply as an overlay district...