Manhattan Levee Project

photo of existing levee

The Manhattan Levee was authorized by the federal government in 1954 and construction was completed in 1963. The levee protects approximately 1,600 acres of land, 7,600 residents, and $1.4 billion of public and private infrastructure, including the post office, water treatment plant, wastewater treatment plant, multiple elementary schools, and the ninth grade center.

However, the levee does not provide the level of flood protection to which it was originally designed. A feasibility study conducted by the The U.S. Army Corps of Engineers (USACE) recommends raising the levee by an average of 1.5 feet, with a maximum raise of 3.3 feet in some sections, in order to protect the community from a 1% (or 100 year) flood event. 

The USACE has entered into a public partnership agreement with the City to raise 4 miles of the levee along Hayes Drive to the Big Blue and Kansas Rivers. The project will also rehabilitate and/or replace the original gate structures and technology as needed. The agreement stipulates the City will pay for 35% of the project costs.

Timeline: Design will be complete in 2020. Construction will occur from 2021-2023.

Total Project Cost: $33 Million

  • Federal match: $19.6 million
  • Local match (0.3% Sales Tax): $13.4 million 
map of levee and area it protects

History

Text courtesy of the Kansas Historical Society Kansapedia 

July 13, 1951 has been called by some Black Friday. It was on this day that one of the most costly floods in Kansas’ history swept down the Kansas River valley into the Missouri River basin. The Kansas River valley had flooded before but not with this magnitude and damage. During the period of July 9-13, some areas in the Kansas River basin received 18.5 inches of rain. The eastern half of the basin averaged 8 inches. 

The flooding started above Manhattan on the Big Blue River. The Manhattan business district was eventually covered with eight feet of water. Downstream flooding continued in Topeka, Lawrence, and Kansas City.  In Topeka alone about 7,000 buildings were damaged or destroyed.  The rising river waters caused transportation throughout the river basin to come to a halt.  Roads were washed away and railroad tracks moved. Communication lines were downed.  Altogether one hundred sixteen cities and towns were affected; 85,000 persons had to be evacuated from their homes; 22,000 residences in the river basin were flooded and nearly 2,500 completely demolished; 336 businesses were destroyed and more than 3000 flooded. The flood didn’t just affect just the towns and cities, 10,000 farms also suffered damage. Topsoil from fertile fields was removed by the flood waters, while heavy deposits of sediment and sand were left in its place. The flood claimed 28 lives as more than 1 million acres were flooded. Total losses in the Kansas River Basin and in Kansas City Missouri and Kansas City Kansas exceeded $725,000,000. 

During the depression of the 1930’s the federal government had proposed building flood control dams along tributaries of major rivers in Kansas.  Part of the New Deal programs, these projects would have provided jobs for unemployed workers and perhaps prevented downstream flooding.  The Flood Control Act of 1938 had authorized construction of Tuttle Creek Reservoir, but no action had been taken.  The Flood Control Act of 1944, known as the Pick-Sloan Plan had authorized the U.S. Army Corps of Engineers and the Bureau of Reclamation to coordinate plans along the entire Missouri River basin.  Lack of funding had delayed action on the building of Tuttle Creek Reservoir.  The Flood of 1951 would change that.  

Business men and residents living downstream along the Kansas River increased the pressure on government officials to protect them from another flood.  On the other hand vigorous opposition was directed at officials from the local to national levels.  Five small Kansas towns were to be inundated (Garrison, Stockdale, Randolph, Cleburne and Bigelow). At least four other towns would lose substantial earning power (Frankfort, Irving, Manhattan, and Marysville). Three thousand residents of the Blue River Valley would be affected by the dam.  Fifteen hundred of these were farm families.  Many of these had cultivated these family farms for more than 85 years.  Transportation facilities, including two railroads would have to be abandoned or moved.  Numerous state highways, county and township roads would need relocated.  Schools, churches, cemeteries, and public utilities were to be moved. Approximately 55,000 acres of the fertile farm land would be inundated.

The people of the valley fought to maintain their existence but in the end Tuttle Creek Dam and reservoir was built. Construction was completed and operation began July 1, 1962. Total cost was $80,051,031. The Army Corps of Engineers estimates that since opening, Tuttle Creek Lake has prevented over three billion dollars in flood damages. However, the building of reservoirs along the drainage area did not bring a stop to the flooding. Again in 1993, the Kansas River and the Missouri River basins flooded. This time however, no lives were lost.The struggle between man and nature continues.

During the peak of the 1993 flood, with approximately 58,800 cubic feet per second (cfs) flow released from Tuttle Creek Lake and approximately 100,000 cfs flowing in the Kansas River, the water surface approached the top of the levee on the Big Blue River segment.  The levee system was originally designed to pass significantly higher flows with a greater margin of safety.  The City and the USACE became very concerned  that the levee may not provide the intended level of protection when it was originally designed.

Over the course of the next 10 years, the USACE completed a fully federally-funded reconnaissance study in 2004 and determined raising the levee and improvements to gate structures were necessary to provide the necessary protection. Since then, it took nearly 15 years for the federal government to conduct a feasibility study and approve funding for the project.