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<br />PRACTICES IN DETENTION OF <br />URBAN STORMWATER RUNOFF <br /> <br />An Investigation of Concepts, Techniques, Applications, Costs, <br />Problems, Legislation, Legal Aspects and Opinions <br /> <br />Principal Investigator and Contractor: <br /> <br />Herbert G. Poertner <br />Engineering and Research Consultant <br />Bolingbrook, Illinois <br /> <br />The work upon which this publication is based <br />was supported in part by funds provided by the <br />United States Department of the Interior as <br />authorized under the Water Resources Research <br />Act of 1964, Public Law 88-379, as amended. <br /> <br />OWRR Project No. C-3380 <br />OWRR Contract No. 14-31.QOOl-3722 <br /> <br />1974 <br />