Agenda - 08-27-2012 - C2 - Laserfiche WebLink

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Soil Services,PLLC Proj ect No. 1 ll 6-1 Local Orange County stream buffer regulations will apply. A brief description of these buffers can be found in the Regulations section. The project engineer or planner should provide input of the application of these regulations to the site plan during design and review. Soil Services can provide reference information and feedback to your engineer regarding stream features observed on-site as needed to determine the appropriate buffer widths and locations as mandated by local authorities. REGULATIONS Regulations that apply to this site are listed below. In the instance of overlapping jurisdiction, the most stringent rules apply in most cases. Soil Services would be happy to discuss how these regulations apply to this project. Orange County Buffers A minimum fifty (50) foot vegetative buffer for development activities is required along all perennial and intermittent waters indicated on the most recent versions of U.S.G.S. 1:24,000 (7.5 minute) scale topographic maps, shown as a water feature on the USDA-NRCS Orange County Soil Survey or as determined by local government studies. Method A of the Orange County Unified Development Ordinance determines buffer width by the following: Depending on watershed slope value, an additional 15 or 30 foot buffer will be added to perennial and intermittent streams with less than 7.5% slope or more than 7.5% slope, respectively. Slope value is determined by measuring the average slope across 250-foot perpendicular transects along a 200-foot reach of stream. Method B uses the slope value as well as the groundcover type to determine the required buffer setbacks. This method can be found in the Orange County UDO Table 6.133.D. Wetland Permitting Please note that new Nationwide Permits were issued by the USACE on March 19, 2012. The USACE Wilmington District issued revised Regional Conditions for the 2007 Nationwide Permits on June 5, 2007. Therefore, the USACE may once again review requests for impacts to jurisdictional waters. Due to the complexity of these revisions, we recommend you forward a conceptual site plan to our office for review by one of our permitting specialist, who can best advise you of the specific permitting needs as you progress through the planning process. Generally, wetland impact permits are issued on a per-project basis as determined by the USACE. The USACE has determined that impacts on parcels sub-divided from larger tracts are sometimes considered to be cumulative to existing impacts for the large tract. If this is the case, then thresholds for notification may not apply to your project and impacts to streams/wetlands must be considered in light of existing permits. 3 of 4