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A. Structures and other development shall be located to avoid flood damage or that adequately mitigates any identified impacts.

1. If a lot has a buildable site out of the Special Flood Hazard Area, all new structures shall be located in that area, when possible.

2. If a lot does not have a buildable site out of the Special Flood Hazard Area, all new structures, pavement, and other development must be sited in the location that has the least impact on habitat by locating the development as far from the water body as possible or by placing the structure on the highest portion of the lot.

3. A minimum setback of 15 feet from the Protected Area shall be required for all structures.

4. If the proposed project does not meet the criteria of this subsection and subsection B of this section, a habitat impact assessment shall be conducted pursuant to ACC 15.68.440 and, if necessary, a habitat mitigation plan shall be prepared and implemented pursuant to ACC 15.68.450.

B. All new development shall be designed and located to minimize the impact on flood flows, flood storage, water quality and habitat.

1. Storm water and drainage features shall incorporate low impact development techniques, if technically feasible, that mimic predevelopment hydrologic conditions, such as storm water infiltration, rain gardens, grass swales, filter strips, disconnected hard surface areas, permeable pavement, vegetative roof systems, etc., per the city’s current SWMM per Chapter 12.04 ACC.

2. If the proposed project will create new hard surfaces so that more than 10 percent of the portion of the lot in the Special Flood Hazard Area is covered by hard surface, the applicant shall demonstrate that there will be no net increase in the rate and volume of the storm water surface runoff per the maximum extent feasible and as required per the city’s current SWMM per Chapter 13.48 ACC that leaves the site or that the adverse impact is mitigated, as provided in ACC 15.68.440 and 15.68.450.

C. The site plan required in ACC 15.68.170 shall account for surface drainage to ensure that:

1. Existing and new buildings on the site will be protected from storm water runoff; and

2. The project will not divert or increase surface water runoff onto neighboring properties. (Ord. 6761 § 1 (Exh. A), 2020.)