Committee considers mapping and buffer rules for gulches and drainage ways
The committee reviewed draft policies to preserve mapped gulches and drainage ways and to prohibit permanent structures within 100 feet of identified banks; Corporation Counsel warned that blanket open-space redesignations can raise takings issues and that alignment corrections generally require a community-plan amendment or ordinance.
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Planning staff explained that the updated gulch and drainage-way mapping (Figure 3.18) was developed using LIDAR and flow-line analysis to better align open-space designations with actual drainage features. The draft policy would preserve mapped gulches and generally prohibit new permanent structures within a 100-foot top-of-bank buffer; two gulches (Kulani Hakaui and a gulch in an industrial parcel) were discussed as candidates for a 100-foot buffer in the packet.
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