Corps: No new dams for James RiverProposal would not be cost-effective, water district board told.
By: JEFF NATALIE-LEES, Aberdeen American News
ABERDEEN — New elevation data shows building dams in the James River watershed to regulate flooding would be less cost-effective than originally thought, said a project manager for the Army Corps of Engineering.
Steve Rothe reviewed some preliminary findings from a Light Detection and Ranging study at the James River Water Development District meeting in Aberdeen on Tuesday. The data shows that hypothetical dams at different sites would hold less water than estimates using older technology.
A possible dam near Westport along the Elm River, which feeds into the James River, would hold only 29,000 acre feet of water compared to a previous estimate of 45,000 acre feet, Rothe said.
Similar drops in acre feet were noted for other possible dams such as one at Maple River, 11,000 acre feet instead of 17,000, and Dry Branch, 7,600 acre feet instead of 11,000.
The dams would be expensive for the amount of water they would hold and how much land they would protect, he said.
Federal funding for these types of projects would be unlikely because they are basically protecting farmland, Rothe said.
“It is not the best news,” he said. “It is all negative from a proposal point of view, but it is informative.”
The land next to the James River and its tributaries is too flat to make dams that trap water into deep reservoirs, he said. The lakes created would be shallow.
“It is not really news to us,” said Dave Bartel, James River Water Development District manager. “It is like when I talk to a community group about the James River. It is like pouring a glass of water on a table. The water just spreads out.”
Bartel said bigger dam projects aren’t the answer, but there are a lot of smaller projects, such as small dams and shore stabilization, that help protect land and improve water quality.
“There are a lot of little things we can do to help,” he said.
Rothe, who works out of the Army Corps of Engineering office in Omaha, Neb., said the study showed that channel impediments and obstructions in the James River were not a major source of flooding.
The final report will be forwarded to the development district after it is completed. Some of the data in the report will be helpful for projects, he said.
The board approved its 2013 budget at the meeting. Of the $965,438 annual budget approved, $617,438 will go to project assistance.
Bartel reported that the new website, www.jrwdd.com, has been well received. The website lists all project requests and budget information.
The website, which included an option to download the same meeting packet as the directors receive, is an attempt to increase transparency in the organization, Bartel said.
Projects approved at the meeting included:
• $15,600, Hutchinson County, bank and bridge pillar stabilization. The Hutchinson County Highway Department had requested $17,707, but about $2,100 was subtracted for county labor and equipment.
• $37,825, Maxwell Hutterite Colony, bank stabilization. Large rocks called riprap will be placed along the banks of the river which will protect the shoreline and a hog manure lagoon located near the river.
• $80,000, Beadle County bridge repairs. The amount pays for half the repair costs for two bridges.
• $16,000, Yankton County, Harold Klimisch wood pile cleanup.