UNL Post-Construction Stormwater Control Review Form

UNL requires that the Architect/Engineer prepare and submit relevant stormwater calculations and narratives relative to Post-Construction Stormwater Controls (PCSWCs) for all new development or significant redevelopment projects on the UNL City and East Campuses that disturb land in excess of one half (1/2) acre in size. Calculations and narrative shall be provided to FPC and EHS at the beginning stages of the design process.

Fill out the appropriate sections of this document and attach any applicable information (e.g. site plans, drainage area summaries) regarding any Low Impact Development (LID) or Best Management Practices (BMPs) being used. PCSWCs must provide water quality to no less than the first one half inch of runoff from the site and water quantity control to the maximum extent practicable. Refer to the Storm Water Drainage Systems – UNL Lincoln Campus design guidelines for stormwater standards and details to the requirements. BMPs and calculations shall conform to the City of Lincoln Drainage Criteria Manual, Chapter 8, Stormwater Best Management Practices.

Today's Date UNL Project Number Campus Project Name Address Submitted by Company Email Phone Number Estimated Project Start

Site Area Detail

Total Site Area (acres) Disturbed Area (acres) Undisturbed Area (acres)

Pre-Construction

Impervious Area Pervious Area

Post-Construction

Please send any related waiver requests to mnalwala@nebraska.edu.

Impervious Area Pervious Area Is a design guideline waiver required? Yes No If YES is selected above please explain

Water Quality

Prepare and submit calculations and narrative of the amount of water captured and treated on-site by the specifically selected PCSWC(s). The site is required to capture and treat the first one half (1/2) inch of stormwater runoff from the site. Use the WQCV equation described in City of Lincoln Drainage Criteria Manual, Chapter 8, Stormwater Best Management Practices to determine the required storage volume.

Required Storage Volume Storage Volume Provided Is the water quality storage volume provided by the PCSWC greater than the required storage volume? Yes No Provide the water quality narrative below:

Water Quantity

Prepare and submit a narrative describing the key elements for post-development flow control. Consideration should be given to the 2-, 10- and 100-year storm events.

Please submit any relevant stormwater quantity calculations that support the narrative and any relevant data or calculations that compare and contrast pre- and post-development site hydrology characteristics to stormwater@unl.edu.

Plan Review

Narrative description and use of each proposed post-construction structural stormwater controls, and if applicable, a description of any site constraints that prohibit achievement of UNL鈥檚 Design Guideline standards for water quality and/or quantity. Description of design standards relating each proposed post-construction storm water control to the City of Lincoln Drainage Criteria Manual, Chapter 8, Stormwater Best Management Practices City of Lincoln. Estimates of post-construction structural stormwater controls lifespan and operation and maintenance costs. Identify any specialized equipment that is necessary or that would need access to maintain the PCSWC in perpetuity.

Please send relevant PCSWC and site information (e.g. site plans, drainage area summaries, hydrograph models, manuals, etc.) to stormwater@unl.edu.

Reference the website for more information regarding PCSWCs at UNL’s City and East Campuses. Questions about the form can be directed to the UNL EHS Stormwater Specialist at stormwater@unl.edu or 402-472-2212.

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