1	Storm Water Management and Development Site Planning Planning Partnership of the Hamilton County Regional Planning Commission: Storm Water Education Task Force
2	Why we are here:
3	Storm Water Education Task Force Purpose: To develop an educational program for all planning commissions and zoning boards within Hamilton County on storm water issues related to the NPDES* Phase II permit requirements.
4	Storm Water Education Task Force Subcommittee of the Planning Partnership of the Hamilton County Planning Commission Task Force Member Affiliations: Planning Partnership of the Hamilton County Regional Planning Commission Hamilton County Soil & Water Conservation District Hamilton County Wet Weather Initiative Mill Creek Restoration Project Mill Creek Watershed Council FMSM Engineers Inc. CDS Associates Inc.
5	NPDES Phase II Storm Water Permit Program Results from the 1972 Clean Water Act Purpose is to protect and improve the quality of rivers, streams and lakes from “non-point” sources Chemicals washed off streets, parking lots and lawns by rainfall Sediment and waste from construction sites or stream bank erosion Runoff from agricultural activities Illicit discharges to storm drains Failing septic systems
6	NPDES* Phase II Storm Water Permit Program Facilitates and promotes regional watershed planning Regulates construction activities for sites greater than one acre Affects most urbanized areas in the State of Ohio * National Pollutant Discharge Elimination System
7	Phase II Storm Water Regulations: Six Minimum Control Measures Public education and outreach Public involvement/participation Illicit discharge detection and elimination Construction site storm water runoff control Post-construction management Pollution prevention/good housekeeping
8	How will it affect my community? Local governments must submit permit application and implementation plan to Ohio EPA by March 10, 2003. Requires improved ordinances for erosion & sediment control and illicit discharges. Requires implementation of storm water best management practices (BMP’s). Requires improving site development and watershed protection techniques.
9	Basic Definitions Storm water – Precipitation or rainfall that does not infiltrate into the ground or evaporate into the air. Runoff - Storm water, and associated substances, discharged into streams, lakes, sewers or storm drains. Watershed - Land area from which water drains toward a common surface water body in a natural basin.
10	Basic Definitions - Continued Imperviousness – Portion of a watershed that is covered by surfaces (parking lots, roads, roof tops) that will not absorb rainfall. Best management practices (BMPs) - Any means, practice or technique to significantly reduce or eliminate storm water pollution.
11	General Site Development Principles A developed area should behave hydrologically as it did before the site was developed. (The amount of storm water leaving site should not increase after development.) The developer should seek to use the site’s natural features, protect sensitive areas and limit imperviousness.
12	Twelve Principles for Responsible Site Development*
13	Principle One Each parcel of land is part of a much larger watershed.
14	Principle Two Storm water is an important natural resource that should be used to replenish our rivers, streams and lakes.
15	Principle Three It is generally more efficient and cost-effective to prevent problems rather than attempt to correct them after the fact.
16	Principle Four The final design of a storm water management system should attempt to mimic and use the natural drainage features of the site.
17	Principle Five Post-development runoff characteristics (volume, rate, timing and pollutant load) for a given site should closely resemble predevelopment conditions.
18	Principle Six
19	Storm Water BMP: On-Site Infiltration Trench Designed to encourage reduction of runoff pollutant load and groundwater recharge.
20	Storm Water BMP: On-Site Sand Filter Designed to address pollutant load in runoff and encourage ground water recharge.
21	Principle Seven When possible, avoid discharging storm water directly to a surface water body such as a stream.
22	Storm Water BMP: Vegetated Island Vegetated parking lot islands are designed to allow infiltration of parking lot runoff.
23	Storm Water BMP: Wetland On-site wetland constructed to slow down storm water runoff and reduce pollutant load.
24	Principle Eight Storm water management systems (particularly methods that use vegetation as a key component) should be designed, constructed and stabilized before the facilities that discharge to them are built.
25	Principle Nine Begin at the “end of the pipe,” the receiving stream.
26	Principle Ten Design and construct, to the extent possible, the storm water management system along natural site contours.
27	Principle Eleven Vegetated buffer strips (riparian corridors) should be retained or created along banks of streams or lakes.
28	Principle Twelve Regular inspection and maintenance is a key component of a storm water management system!
29	Site Development and Storm Water Management Case Studies
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33	Stormwater BMPs Perforated stormwater conduit to encourage groundwater recharge
34	Stormwater BMPs Sediment trapping catch basins
35	Stormwater BMPs Construction road stabilization
36	Stormwater BMPs Slow release device detail
37	Stormwater BMPs Roof drain cisterns for landscape irrigation
38	Stormwater BMPs Enlarged vegetated parking lot islands to encourage infiltration of runoff
39	Residential Case Study: Standard Practice
40	Residential Case Study – Revised Plan
41	Implemented Stormwater BMPs Principles 3 & 8: Constructed stormwater management features (detention basins) before building
42	Residential Example: Landscape Plan
43	Implemented Stormwater BMPs Principle 10: Preserved natural site contours
44	Remember, storm water is a resource!
45	This presentation has been developed as an educational tool on stormwater management. The presentation is a compilation and adaptation from works from different authors, including "Basic Principles of Site Planning and Stormwater Management" created on July 27, 1999 by James L. Smoot at University of Tennessee, College of Engineering.
46	References and Citations “Basic Principles of Site Planning and Stormwater Management” created on July 27, 1999 by James L. Smoot at University of Tennessee, College of Engineering James L. Smoot, PhD, PE Assistant Regional Hydrologist - NAWQA U.S. Geological Survey 3850 Holcomb Bridge Road, Suite 160 Norcross, Georgia 30092-5223 Office Phone: 770-409-7724 Cell Phone: 404-452-9220 FAX: 770-409-7725 Office E-Mail: jlsmoot@usgs.gov Watershed Boundaries, ODNR, OEPA, NRCS, USGS, 2000 Photos from website of Marten son and Eisele, Inc. Metzig Hills subdivision Federal Interagency Stream Restoration Working Group, 1998 Soil & Water Conservation Districts of Southwest Ohio Ohio Department of Natural Resources, 1996 Lo Gioco Landscaping, Inc., no date Invisible Structures, no date University of Maryland, 2000 http://www.raingardens.org/ “Stormwater and Your Community,” Fact Sheet AEX-442, The Ohio State University - Extension “Impacts of Development on Waterways”, Nemo Project Fact Sheet 3 - University of Connecticut Cooperative Extension System, College of Agriculture and Natural Resources Stormwater Fact Sheet No. 8, Land-Of-Sky Regional Council, Asheville, NC 28806 “Non Point Source Water Pollution,” Fact Sheet AEX-441-00, The Ohio State University – Extension “Multi-Functional Landscaping: Putting Your Parking Lot Design Requirements to Work for Water Quality,” Fact Sheet CL-1000-01, The Ohio State University - Extension “Hamilton County Storm Water Study”, Metropolitan Sewer District of Greater Cincinnati, Feb. 6, 2002