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for many of the remaining rivers which are already <br />subject to a myriad of uses and are subject to a <br />broad range of competing demands. Protection/ <br />development decisions can also not be resolved <br />with a simple decision to "protect in its natural <br />state" or "develop". Instead, more specific goals <br />must be formulated for particular areas reflecting <br />a broad range of factors including, in some <br />instances, restoration of degraded river and <br />adjacent corridor areas. <br />- Many of the most suitable sites for dams and <br />reservoirs and, to a lesser extent, other <br />engineering works have already been utilized. <br />Remaining sites often offer lower cost/benefit <br />ratios or are unsuitable geologically or <br />hydrologically for structural works. Existing <br />residential, commercial, or industrial development <br />has also effectively "preempted" many sites due to <br />the high cost of land acquisition for developed <br />areas. This means that alternative multiobjective <br />approaches to flood loss reduction and erosion <br />control may be particularly attractive. <br />- Interest in rivers has broadened to include <br />mid-size and small rivers, including creeks, and <br />drainageways. Most of the floodplain mapping and <br />river gauging, assessment, planning, and river <br />management efforts in the U.S. in the 1960's- <br />1980's addressed larger rivers and streams and <br />adjacent lands. Most of the protection/development <br />disputes also concerned these highly visible and <br />heavily used water bodies. But, in the last decade <br />interest has broadened to include the mid-size and <br />smaller rivers, streams and creeks for a variety <br />of reasons. First, much of the pollution from <br />nonpoint sources is being carried into the larger <br />rivers from urban runoff, stormwater, agricultural <br />runoff and other sources along smaller rivers, <br />streams and creeks. It is impossible to improve <br />water quality on the larger rivers without <br />addressing problems at their source. Second, many <br />of the prime wetlands, wildlife areas, and habitat <br />areas lie along smaller "feeder" rivers and <br />streams. Third, it has been gradually recognized <br />that much of the flood and "drainage" damage <br />occurring in the U.S. is occurring adjacent to <br />small and midsize rivers and streams which often <br />lack floodplain maps, gauging, or regulations. In <br />addition, increased runoff from small rivers and <br />streams in urbanized areas is, collectively, <br />greatly increasing flood peaks on larger rivers <br />and streams. Fourth, public river-related <br />recreation interests and needs have broadened to <br />include rafting, kayaking, tubing and fishing in <br />small creeks and rivers. In addition, the lands <br />adjacent to small rivers and creeks is used <br />increasingly for walking, hiking, birdwatching, <br />nature watching, jogging, etc. <br />- Interest in river protection and restoration <br />has broadened from primarily a rural orientation <br />to one that includes urban and urbanizing rivers <br />and streams. At one time there was,little interest <br />in urban rivers and streams except for development <br />purposes (warehouses, docks, ports). However, with <br />improved water quality in the nation's rivers and <br />shifting public needs, interest has shifted in <br />cities across the nation to restoration of <br />waterfronts and protection of undeveloped areas, <br />restoration of historic buildings and "heritage" <br />areas, providing parks and walking areas, and <br />enhancing the economic values of riverfront areas <br />for commercial and residential use. In the last <br />twenty years many of the most innovative river and <br />river corridor restoration efforts have been in <br />the cities (Rusler 1982b; NPS, in press; Riley, in <br />press). It is now rare for a large or mid-size <br />city not to have some sort of river and stream <br />waterfront protection, restoration, or management <br />plan. <br />- The constituencies for river corridor protec- <br />tion, restoration, and management have broadened. <br />At one time, the major proponents of river <br />management were navigational interests (barge <br />traffic, etc.), commercial and industrial <br />developers, and boaters, and flood loss reduction <br />planners and engineers. Engineering approaches <br />such as dredging and construction of dams were <br />often favored by these groups. In the 1960's and <br />1970's, the number of fishermen and nonpower boat <br />(canoe, raft, sailboat) river recreational users <br />favoring free-flowing streams and open, vegetated <br />floodplains increased. In the 1980s these groups <br />were joined by many others: birdwatchers; joggers; <br />kayakers; rafters; "tubers"; and owners of stores, <br />motels, hotels, and shops desiring an attractive <br />nearby river or stream environment; residential <br />subdividers and developers also desiring an <br />attractive environment for residents, etc.; and <br />specialists in nonstructural flood and erosion <br />loss measures. Collectively, these groups have <br />substantial political clout at all levels of <br />government. <br />- Legislative and other government management <br />goals for rivers and adjacent lands have <br />broadened. At one time, the legislative goals <br />contained in programs for management of rivers or <br />stretches of river were often a single objective <br />or limited to several objectives. For example, <br />channelization was carried out for tens of <br />thousands of miles of smaller creeks with the <br />legislative objectives of draining land with <br />agricultural potential and reducing flood losses. <br />Dams were often constructed on larger rivers for a <br />single principal legislative objective: flood <br />control, navigation, or hydropower. Due to <br />broadened public interests and concerns, the <br />legislative goals for river and adjacent river <br />corridor management have broadened. <br />- New federal, state, and local regulations <br />have been adopted which codify these goals and <br />provide new, tougher standards for water and <br />shoreland uses. These new objectives have, to a <br />greater or lesser extent, been codified in various <br />regulatory requirements which act as restraints on <br />traditional engineering projects. These regula- <br />tions include federal, state, and local wetlands <br />regulations including the "no net loss standard", <br />state and federal instream flow requirements, <br />state and federal nonpoint source pollution <br />control requirements, state and federal stormwater <br />requirements (e.g. a recent E.P.A. requirement <br />that cities over 100,000 population prepare <br />stormwater management water quality plans), state <br />and local floodplain regulations, state and local <br />special "stream and local" river controls, and <br />various comprehensive zoning and planning <br />regulations with natural resource management <br />components. <br />11