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Agenda - 10-15-2013 - 5f
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Agenda - 10-15-2013 - 5f
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6/12/2015 10:43:02 AM
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10/14/2013 9:11:08 AM
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BOCC
Date
10/15/2013
Meeting Type
Regular Meeting
Document Type
Agenda
Agenda Item
5f
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Minutes 10-15-2013
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\Board of County Commissioners\Minutes - Approved\2010's\2013
ORD-2013-036 Ordinance approving Budget Amendment #2-A and Upper Neuse River Basin Assoc. Funding Request
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\Board of County Commissioners\Ordinances\Ordinance 2010-2019\2013
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0 <br />Attachment A. Instructions for Preliminary, Screening -Level Cost Estimates and <br />Schedules <br />The information you should use to develop your preliminary, screening -level cost estimates and schedules are provided <br />below. The UNRBA technical steering committee does not expect those firms invited to provide qualifications to conduct <br />an extensive project planning analysis as part of the qualifications package. The committee is requesting the development <br />of preliminary, screening -level estimates using a minimum level of effort. However, these estimates should have some <br />basis in how the firm will approach the task. That basis should be included as a 1- paragraph description with each upper <br />and lower level estimate. Estimated costs may be presented with a ±10% contingency to reflect a higher level of <br />confidence, and a f15% contingency to reflect a lower level of confidence. Using the list of the 5 submittal components, <br />information under item 5 should address the following: <br />5.a. Credit Development <br />Low end estimate: Develop nutrient credits for sixteen (16) nutrient reduction measures as listed in Table A -1. The <br />credits will be developed using data from existing studies and located in existing publically available databases. A <br />measure of central tendency will be the basis of the removal credit recommendation assigned to each BMP. A project <br />database will be created for this task. Sources of data and information may include but not limited to the International <br />Stormwater BMP Database, the National Stormwater Best Management Practices Database, NC State University BMP <br />Databases, Chesapeake Stormwater Network, the USEPA Green Infrastructure Case Studies, and other appropriate <br />organizations or credit development processes. <br />Table A -1. Practices for the Low -End Credit Development Estimates <br />Over/Under -Sized <br />Level Spreader/Filter <br />Check Dam Grass Swale <br />Green Roof (revision <br />Bioretention <br />Strip combined with <br />(Diversified) basins: permeable <br />requested to existing <br />Swale <br />walkways, planters, <br />nutrient credit values) <br />Soil Amendments <br />Volume -based Pond <br />Infiltration Practices <br />Street Sweeping <br />/Restoration <br />Retrofits <br />(Refine) <br />Urban Tree Canopy <br />Permeable Pavement <br />Pond Retrofits/Upflow <br />Check Dam Grassed <br />Filter Strips with <br />(Diversified) <br />Filter <br />Swales <br />Bio- Swales <br />Filter Strips with Toe <br />Leaf Litter Recovery <br />Improved Rainwater <br />Riparian buffer <br />Trenches <br />Blue Roof <br />Harvesting <br />High end estimate: Similar to the low end estimate, develop recommended nutrient credits for fifty -five (55) nutrient <br />reduction measures as listed in Table A -2. Credits will be developed using data from existing studies and located in <br />publically available databases. Instead of a measure of central tendency as the basis for assigning credit, the service <br />provider would be expected to use an analysis of the distribution of reported removal efficiencies to incorporate <br />uncertainty and variability into the removal efficiencies. <br />Table A -2. Practices for the High -End Credit Development Estimates <br />Over/Under -Sized <br />Level Spreader /filter <br />Permeable Pavement Infiltration devices/ <br />Flood plain <br />Bioretention <br />Strip combined with <br />(Diversified) basins: permeable <br />restoration <br />Swale <br />walkways, planters, <br />infiltration trenches <br />(Refine) <br />Soil Amendments <br />Pond Retrofits/ <br />Check Dam Grassed <br />Bio - Swales <br />Filter Strips with <br />/Restoration <br />Upflow Filter <br />Swales <br />Toe Trenches <br />Leaf Litter Recovery <br />Urban stream <br />Riparian buffer <br />Catch basin inserts <br />Blue Roof <br />restoration <br />restoration (50 -feet <br />and vortex <br />wide buffers) <br />separators <br />Constructed Sand filters <br />Peak flow control Proprietary devices <br />Impoundment of <br />wetlands with <br />for water quality <br />urban, degraded <br />various designs <br />credits <br />streams <br />Enhancing or Land or forest Riparian buffer Increase tree canopy <br />Cattle exclusion, <br />repairing existing protection restoration with <br />with and without <br />riparian buffers varying width <br />buffers <br />Page 2 of 3 <br />
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