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ACRE BASED PROPERTIES (INDUSTRIAL & COMMERCIAL, MULTI-FAMILY & CHURCHES, CEMETARIES & GOLF COURSES, PARKS, SCHOOLS & COMMUNITY CENTERS) Acre based properties will receive a credit based on the targeted rainfall volumes that can be kept on site. The credit will be based on capturing a 10 year (4.2") or 100 year (7.4") Type II rain event from the desired drainage area. Only the drainage area that is treated will be eligible for the credit. This program does not provide credits for practices that are required by a permit. Practices that go above and beyond the permit are eligible for stormwater credits. Property owners that receive cost share funding from a watershed district, state agency, etc., are eligible for the stormwater credit program. Below is a partial list of stormwater BMPs approved for use in the Stormwater Credits Program: Raingardens, pervious pavers, wet ponds, dry wells, sand filters, filter strips, infiltration trenches, green roofs The installed BMP's will be certified by the property owner, or agent of the property owner, to show that the BMP is still functioning as designed. Certification will need to be provided, at a minimum, every 5 years after the city has approved the project. The following credit will be applied to the area treated based on the event captured: STORM WATER UTILITY CREDIT FOR ACRE BASED USES Rainfall Event (inches/24 hr) Credit % 10 Year (4.2") 25% 100 Year (7.4") 75% 10 year, 4.2" event will reduce the annual fee by 25% 100 year, 7.4" event will reduce the annual fee by 75% Acre Based Use Example: In 2014, a 50 acre industrial site is treating rainfall from 17 acres of their site with no discharge to the city storm sewer system. The annual stormwater fee for the 50 acre property is $36,220. Below is the breakdown of the annual reduction in stormwater fees depending on the rainfall that is captured from the 17 acres that is being captured: Stormwater Credit % Reduction $ Reduction 10 year (4.2") 25% $3,078.70 100 year (7.4") 75% $9,236.10 Updated: 25 April 2014 R:\PublicWorks\Engineering\Drainage\StormWaterUtility\Stormwater Credit Program.docx