Administrative Manual January 2025

Part 4. Appendices 4.5 Checklists

Construction Plan Approval for a Preliminary Subdivision Plat Approval (Type 1 or Type 2) Checklist (use this checklist for concurrent review applications) For each listed item, check (√) if provided, write “n/a” if the feature does not exist or is not proposed, and write “w” if a waiver from the requirement is justified because it is unnecessary in the particular case to determine compliance with applicable regulations. Staff Use Only √, n/a, or w Application Submittal Requirement √, n/a, or w 9 Location of screen wall for ground level mechanical equipment including shadow (height and width) of the equipment 10 Detail of commercial container enclosure(s), including the opaque gate 11 Location of all utilities attached to the building

Add the following tables for each structure (fill in blanks)

Area of Façade Walls Area of Window and Doors Net Total Façade Wall Area1

______________ sf ______________ sf

______________ sf [1] Net Total Façade Wall Area is the Area of Façade Walls minus Area of Window and Doors

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Area of predominant net façade material ____________ sf ____________% Area of non-predominant net façade material ____________ sf ____________%

13 Location and dimensions of proposed dumpster, recycling container, and/or trash compactor(s) Q Stormwater Report 1 Runoff Calculations report for all proposed storm drainage structures including, but not limited to culverts, storm drain systems, inlets, ditches, open channels, BMPs, outlet protection, etc. The report shall be sealed and signed by a registered North Carolina Professional Engineer. 2 Narrative description of Existing Conditions, Natural Resource Inventory, Stormwater Management Plan, calculations (methods, variables, assumptions, etc.) and results. 3 Hardcopy & .xls file of completed Storm-EZ form 4 Maps

• Pre- and Post-Development Drainage Area Maps (on full-size plan sheet) • BMP drainage area map (include area of BMP itself) (on full-size plan sheet) • Inlet drainage area map (on full-size plan sheet) • USGS Quad map (identify site) • FIRM map (identify site) • Wake County Soil Survey (1970) map (identify site) 5 Runoff coefficient calculations

• Rational Formula (up to 5 acres) • SCS Method (discrete CN method)

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Time of concentration for pre/post development conditions

7 Analyze pre-development and post-development runoff conditions for each discharge point from the site 8 No net increase from pre-development peak flow for 1-yr, 2-yr, & 10-yr, 24-hr storm events 9 Roof drain & leader calculations (designed per the NC Plumbing Code) 10 Storm Drain System Design Calculations • Pipe material – RCP, minimum pipe diameter of 15 inches, minimum slope of 0.5% • Pipes carry the 2-yr storm at a velocity of at least 2 • 10-yr (contained in pipe) & 25-yr (contained in structures) HGL calculations & profiles • Swale calculations showing non-erosive flow for 10-yr storm • Gutter spread calculations for 4 in/hr storm (8ft max spread) • Culvert calculations (energy equation & nomographs) • Rip rap apron calculations/nomographs 12 Stormwater Quality (85% TSS removal)/Quantity Best Management Practices (BMPs)

Morrisville, NC

May 29, 2020

Administrative Manual

Page 39