Sec. 70-441 to 70-451

Other

• Stormwater BMPs to achieve no net increase in phosphorus

  For new development, the post-development nonpoint source pollution runoff load shall not exceed the predevelopment load, based on the CBLAD default average watershed load of 0.45 pound of phosphorus per acre per year.

• Redevelopment shall not increase imperviousImpervious coverageThe share of a lot covered by anything water cannot soak through — roofs, drives, patios. cover

  Redevelopment shall be permitted only if there is not an increase in the amount of impervious cover and no further encroachment within the RPA.

• Plan of development required for land disturbance >2,500 sq ftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  All development and redevelopment exceeding 2,500 square feet of land disturbance shall be subject to a plan of development process.

• Preserve trees over 4 inches DBH outside construction footprint4 inch

  Existing trees over four inches in diameter at breast height (DBH) shall be preserved outside the construction footprint.

• Resource Protection Area buffer width100 ft

  A 100-foot vegetated buffer area located adjacent to and landward of the components listed in subsections (a)(1)a—(a)(1)c of this section, and along both sides of any water body with perennial flow.

• Water quality impact assessment required for certain developments

  A water quality impact assessment shall be required for any proposed development or redevelopment within RPAs and any development within the RMA that results inland disturbance in excess of 50,000 square feet, or that results in 60 percent or more impervious cover on the lot or parcel being developed.