PROGRAMS AND PLANS--Opportunities in Urban Hydrology In Reply Refer To: WGS-Mail Stop 415 June 29, 1990 OFFICE OF SURFACE WATER TECHNICAL MEMORANDUM NO. 90.13 SUBJECT: PROGRAMS AND PLANS--Opportunities in Urban Hydrology The long awaited stormwater permitting regulations by the Environmental Protection Agency (EPA) are expected to become law about the third week of July 1990. The regulations will cause cities with urban populations of 100,000 or more to apply for a National Pollutant Discharge Elimination System (NPDES) stormwater permit. Cities with populations over 250,000 will have about 2 years to comply while cities less than 250,000 but more than 100,000 will have about 1 year to prepare their permit. Preparation of the NPDES stormwater permit may require various kinds of hydrologic information and data collection, both for the initial permit and as a part of compliance monitoring. We believe you should be aware of the implementation of new regulations and of the possible opportunities for U.S. Geological Survey (USGS) urban hydrology programs. Discussions have taken place in various parts of the Nation between USGS and municipalities or their consultants. In fact, private consultants frequently advise their clients to seek out USGS for monitoring and analysis needs. A program already exists with the city of Nashville, for example. For a copy of the project proposal and other information, contact Marshall Jennings, Office of Surface Water (OSW), at 512-832-5791. Marshall is in contact with EPA, has served on various EPA task groups, and can give you guidance in formulating new programs with local cities. In some Districts, cooperative funding might be used for urban stormwater-quality projects; in other Districts, unmatched funding may be a more appropriate mechanism. Most studies will involve measuring stormwater flow and sampling water quality on small urban catch-ments or in receiving waters. Because the regulations will require interpretation, close association with OSW and EPA Regional Office is advised when preparing a project proposal. After implementation Marshall will have available a summary of the regulations. As a matter of interest, Marshall has organized a National Urban Hydrology and Drainage Issues Symposium as part of the American Water Resources Association Meeting, November 4-9, 1990, in Denver, Colorado. The preliminary program will be available soon and includes about 25 USGS authored papers and posters. It may be advisable to send one or more of your District staff to this meet- ing to gain information and contacts about urban hydrology stormwater-quality projects. It is expected that representatives from many of the 170 cities affected by the regulations will be in attendance. State, EPA, and local city officials, as well as private consultants, will discuss aspects of the EPA municipal stormwater permitting legislation. Charles W. Boning Chief, Office of Surface Water WRD DISTRIBUTION: A, B, FO, PO