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This publication was prepared for the Associa- <br />tion of State Floodplain Managers by Jun A. <br />Kusler, Attorney at Law, Chester, Vermont, <br />and Rutherford H. Platt, Associate Professor <br />of Geography and Planning Law, University of <br />Massachusetts at Amherst. Case citations and <br />more detailed ch'scussion may be found in a <br />background report: Kusler, Floodplain Regula- <br />tions and the Courts, 1970-1981, available for <br />$5.00 as Special Publication 5, Natural Hazards <br />Research and Applications Information Center, <br />Institute of Behavioral Science, University of <br />Colorado, Boulder (Campus Box 482, Boulder, <br />CO 80309). Readers are also referred for further <br />details to a draft casebook: Kusler and Platt, <br />The Law of Floodplains and Wetlands: Cases <br />and Materials, available from the American <br />Bar Association, Special Committee on Hous- <br />ing and Urban Development, 1800 M Street, <br />NW, Washington, DC 20036. <br /> <br />The opinions expressed in this document are <br />those of the authors and do not necessarily <br />reflect the view of the Association of State <br />Floodplain Managers. <br /> <br />The reader is advised not to rely upon this <br />booklet to resolve specific legal questions. <br />Advice of legal counsel or program officials in <br />the state or community in question should be <br />obtained. <br /> <br /> COMMON LEGAL QUESTIONS <br /> Pertaining to <br />The Use of Floodplains and Wetlands <br /> <br />Q. What roles do the courts play with regard to <br /> the use of floodplains? <br /> <br />A. The Courts play three roles. First, they arbi- <br />trate conflicts and determine liability for damage <br />arising from flooding and drainage problems. <br />Private landowners may sue each other or non- <br />federal governmental bodies to recover damages <br />for flood losses caused by modified drainage or <br />obstructions to flood flowS..Such suits may be <br />based on the common law the6ries of issuance, <br />trespass, negligence, or riparian rights. Plaintiffs <br />usually seek compensation for increased flood <br />losses and/or injunctions requiring removal of fill <br />or other encroachments. In some states, courts <br />have entertained suits by purchasers of flood <br />prone property against sellers under certain cir- <br />cumstances. (See Q. 3.) <br /> Second, courts interpret and enforce federal, <br />state, and local laws and regulations pertaining to <br />floodplains and wetlands. These include such <br />measures as floodplain zoning, building codes, <br />subdivision controls, as well as federal regulations <br />concerning flood insurance and disaster assistance. <br /> Third, courts determine the constitutionality <br /> of statutes, regulations, and other governmental <br /> actions such as the acquisition of property. <br /> Only a small portion of court suits addressing <br /> floodplains and wetlands deal with constitutional <br /> issues although these receive the most publicity. <br /> (See Q. 11.) <br /> <br />Q. Are private property owners liable for causing <br /> increased drainage problems or [looding on <br /> someone else's land? <br /> <br />A. This is a difficult question. Liability depends <br />on the law of the state in which the case arises, <br />as well as the nature and purpose of the defend-' <br />ant's alteration of the previous drainage patterns <br />or stream flow and the type of waters affected. <br />In general, a property owner is liable for causing <br />substantial and damaging increases in flooding. <br /> Traditionally, the issues of liability for drainage <br />or flood flow modification has been decided on <br />the basis of one or the other of two contrasting <br />rules. The "Common Enemy Rule," followed by <br />a dwindling number of states, views storm drain- <br />age and flood waters a "common enemy" against <br />which every property owner has a right to take <br />defensive actions without liability to other parties. <br /> <br /> <br />