The Fox River watershed, a tributary of the Illinois River, is located in southeastern Wisconsin and northeastern Illinois. The basin has an area of 2,600 square miles. The land within the watershed is undergoing a rapid transition from rural to urban use. Flood peaks may be expected to increase as urbanization continues. Floods of varying magnitude occur at relatively frequent intervals. The most damaging flood occurred in April, 1960 causing urban damage amounting to $2,200,000. Pollution of ground water is a potential problem in many areas. Boating, camping, fishing and picnic sites make the Fox River watershed a highly attractive area for recreation. The study cost estimate has been increased from $75,000 (April, 1960) to $214,000 to reflect: added environmental studies, $8,000; added recreation planning, $11,000; increased public coordination, engineering studies and economic analyses, $41,000; and salary and administrative cost increases, $79,000.

The Kickapoo Creek Basin is located in central Illinois and is tributary to the Illinois River. The basin covers 319 square miles, almost entirely within Peoria County, and contains both rural and urban areas. About 5,640 acres in the basin are subject to flooding. Past flooding has been relatively frequent and has caused damages to crops, railroads, highways, and urban areas. This study will investigate the feasibility of meeting needs of the basin by constructing a multiple-purpose reservoir or reservoirs and other improvements. Particular emphasis will be given to meeting needs in flood damage control, water supply, water quality, recreational development, and fish and wildlife enhanceThe study cost estimate has been increased from $100,000 (July, 1966) to $176,000 to provide for: added environmental studies, $12,000; increased recreation planning, $15,000; and salary and administrative cost increases, $49,000. 324,000

ment.

La Moine River

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354,000

5,000

10,000

15,000

The La Moine River is located in west central Illinois and is a tributary of the Illinois River. The river basin includes about 1,360 square miles of primarily agricultural lands and extends over portions of seven counties. About 19,000 acres within the basin are subject to periodic flooding. Frequent flooding has caused damages to crops, buildings, transportation systems, and levees, and has also produced soil erosion and sedimentation problems. This study will investigate the feasibility of meeting needs of the basin by constructing a multiple-purpose reservoir and other Particular emphasis will be placed on meeting needs in flood damage control, water supply, water quality, improvements. recreational development and fish and wildlife enhancement. The study cost estimate was increased from $240,000 (August, 1967) to $354,000 to provide for: added environmental studies, $32,000; increased recreational planning, $39,000; and public coordination, together with salary and administrative cost increases, $43,000.

The

The Little Calumet River rises in the northwestern part of La Porte County, Indiana and flows westerly through Indiana into Illinois to its junction with the Cal-Sag Channel, draining an area of 587 square miles. Much of the flood plain along the main stem and tributaries is urban and a number of severly damaging floods have occurred in recent years. Results of a detailed damage survey, conducted in 1969, show that a recurrence of the 1947 flood with present development would cause an estimated $22,500,000 in damages, in 1969 dollars. A preliminary study of flood control needs, completed in 1962, found that the project costs were more than the estimated savings. Local interests requested that the study be deferred so they could make a land appraisal study and review all potential benefits. results of their study did not affect the preliminary economics. In 1965 Congress expanded the study scope to include recreational navigation and subsequently a plan was prepared for a project which would control flooding and develop the recreation potential of the river. Coordination with the two states and several communities involved has taken more time and money than anticipated. Illinois has several objections to the plan, but Indiana favors the main concept and has requested that funding be resumed in order to complete the report as soon as possible. It is felt that any objections can be resolved in the near future. The study cost estimate has been increased from $115,000 (September, 1965) to $165,000 to provide for: added environmental studies, $10,000; increased recreation planning, $10,000; added engineering and economic studies to prepare a final plan and report, $20,000; and extra public coordination together with salary and administrative cost increases, $10,000.

The study will determine the feasibility of modifications of the existing flood control projects to provide increased flood protection for 15 agricultural levee and drainage districts containing 330,000 acres, and 3 urban areas containing some 1,000 acres. Local interests state that substantial industrial, commercial, and residential developments have taken place in the areas protected by the recently completed projects. The total value of these developments, although not statistically determined, is estimated to be in the range of 150 to 200 million dollars. Additionally, the thousands of acres of agricultural lands have materially increased in usage and in value because of the reduction of flood risk. The existing projects were designed and constructed to protect against floods having a recurrence interval of 50 years for agricultural areas, and 100 years for urban areas. Upper Mississippi River flow-frequency studies made during the period 1943-1945 were the basis for the selection of levee heights. These flow-frequency data

This study will consider improvements for flood control and allied water and related land resources in that part of the Rock River basin upstream from Rockton, Illinois, including the Pecatonica River, Sugar River, and Turtle Creek. Major flooding on the Rock River and its tributaries in Wisconsin occurred in the early spring months of both 1959 and 1960. During these floods 20 urbanized areas were affected and the damage totalled about $650,000 in each flood. Communities suffering the heaviest damage were Janesville, Beloit, Watertown, Fort Atkinson, Jefferson, Mayville, and Columbus. Other floods occurred in June, 1963 on the Rock River and in July, 1969 on the Pecatonica River. Other water-related problems in the area involve stream pollution, severe eutrophication, and sedimentation. Local interests also desire improvement of the recreational potential on the river and lakes in the area. The increase of $225,000 in the study cost estimate includes $45,000 for increase in salaries and administrative costs, $80,000 for the additional effort to involve the people of the basin and the State agencies in the planning and selection of water resources improvements, and $100,000 for added study effort for environmental impact considerations and alternative studies of stream, lake, and cultural and aesthetic enhancement.

The Fox River flows generally southeast for about 105 miles and discharges into the Mississippi River about 11 miles downstream from Keokuk, Iowa. It drains a long, narrow basin of about 502 square miles in southeastern Iowa and northeastern Missouri. About 27,600 acres of land in the basin are subject to inundation, including 10,700 acres in the Mississippi-Fox River Drainage District, which occupies the Mississippi River flood plain. Floods usually occur during the crop-growing season and most of the flood damage is to crops. The most recent damaging flood in the basin occurred in June, 1960, resulting in damages estimated at $700,000, of which about $250,000 in damages occurred in the Mississippi-Fox River Drainage District area. The Mississippi River floods of 1965 and 1969 caused damages in this drainage district estimated at $126,000 and $100,000, respectively. Studies for the basin, completed in 1965,

indicated flood control improvements were economically justified for the Mississippi-Fox River area at the mouth, but the area was not organized for local cooperation support. The Mississippi-Fox River Drainage District No. 2 and the Lone Star Levee District were organized in 1968 and comprise all of the area of the formerly unorganized Mississippi and Fox River Drainage District. They now provide organizations for the necessary support. The increase in the study cost estimate from $77,000 (July, 1968) to $118,000 includes $2,000 for pay raises, $6,000 for environmental impact studies, and $33,000 to reflect the complexity in analysis of the existing damage potential from the several streams and the consideration of alternative solutions and interior drainage requirements.

This study will consider the serious flood problems at a number of urban and rural areas that have been damaged by the major floods of 1960, 1961, 1962, 1965, and 1969. A record flood occurred in 1969 on the Iowa River at Marshalltown, Iowa. Damage in Marshalltown and to crops and property downstream amounted to $3,500,000. The March, 1965 flood caused an estimated $2,500,000 in damages in the basin. Other needs to be considered include water supply, water quality control, recreation, fish and wildlife, agricultural drainage improvements, and major drainage problems. Larger communities to be studied include Mason City, Cedar Falls, Cedar Rapids, Charles City, Waverly, and Greene. The increase of $230,000 in the study cost estimate includes $10,000 for salary increases; $35,000 for additional effort to involve the people of the basin and State agencies in the planning and selection of water resources improvements; $30,000 for environmental impact studies; and $155,000 to investigate the numerous flood control problems, solutions, and alternatives, and basin system analysis to evaluate water quality control needs and the allied water and related land resources needs.

The Turkey River basin comprises a total drainage area of 1,696 square miles in parts of 7 counties located in northeastern Iowa. The Turkey River with principal tributaries, the Volga River and the Little Turkey River, joins the Mississippi River near Guttenberg, Iowa. The study will consider the feasibility of providing improvements for flood control and related purposes for agricultural areas and for several urban communities in the basin. The larger communities (1960 populations) are: Clermont, 570; Elgin, 644; Elkader, 1,526; Fayette, 1,597; Fort Atkinson, 353; Volga, 361; and Wadena, 275. The study cost estimate has increased $15,000, which includes $6,000 for pay raises, $6,500 for environmental impact studies, and $2,500 for non-structural alternative studies.