By JOHN FLESHER
AP Environmental Writer
TRAVERSE CITY, Mich. (AP) — Building an “engineered channel” and taking other steps to prevent invasive carp from using an Illinois waterway to get into Lake Michigan could cost nearly three times as much as federal planners had previously thought, according to a recent report.
The U.S. Army Corps of Engineers this week released a final plan for work to the Brandon Road Lock and Dam near Joliet, Illinois, which experts consider a good location to block the upstream movement of the sort of Asian carp that have infested the Mississippi and Illinois rivers.
Scientists warn that if the voracious carp become established in the Great Lakes, they could out-compete native species and harm the region’s $7 billion fishing industry.
The Corps’ new plan is similar to a draft from August 2017, but the estimated price tag has jumped from $275 million to nearly $778 million.
“Basically during the past year, some additional engineering and design work changed the scope to bring it up to that current cost,” Allen Marshall, spokesman for the Corps’ district office in Rock Island, Illinois, said on Wednesday.
The biggest increase is for building an “engineered channel” at Brandon Road. The lock-and-dam complex is on the Des Plaines River, which forms part of the waterway link between Lake Michigan and the Illinois River, a tributary of the Mississippi.
The plan calls for he channel to use an electric barrier, noisemakers, an air-bubble curtain and other devices both to deter fish from swimming upstream and remove those that don’t turn back. The adjacent lock would be overhauled so it could flush away unwanted species floating on the water.
The draft had proposed using water jets to dislodge fish that might be stunned or caught in gaps between barges. But the new version says a better method would be to generate a continuous, dense curtain of air bubbles in the channel.
The Army Corps is accepting public comments through Dec. 24 and expects to submit its plan to Congress in February. Its timetable envisions that congressional authorization and initial funding will be received next year, building contracts signed by July 2020 and the work completed by March 2027.
Several states that border the lakes, including Michigan and Illinois, had agreed previously to discuss sharing the costs. The escalating price could complicate those negotiations.
“Now that the cost has nearly tripled to $778 million, we need to have a better understanding of how this project, with all the proposed components, actually reduces the risk of Asian carp and other invasive species getting into our Great Lakes in a fiscally responsible manner,” said Ed Cross, spokesman for the Illinois Department of Natural Resources.
Tammy Newcomb, water-policy adviser for the Michigan DNR, acknowledged feeling “sticker shock” but said the revised cost estimate shouldn’t derail the project.
“Given the costs of Asian carp invading our Great Lakes, inaction is not an option,” said Sen. Debbie Stabenow, a Michigan Democrat and chairwoman of the Senate Great Lakes Task Force.
Illinois officials and business groups have questioned the need to drastically re-engineer the lock and dam — particularly if doing so would slow barge traffic on the busy commercial waterway.
Lynn Muench, a senior vice president of the American Waterways Operators, which represents barge companies, said the Army Corps’ report sidesteps the question of whether Asian carp are likely to reach Lake Michigan in sufficient numbers to thrive. The Corps also has no cost-benefit analysis for the deterrents it’s proposing, she said.
Meanwhile, environmentalists were concerned that the Army Corps budget for next year includes no money for he pre-construction engineering and design work needed to get things moving.
“How serious is the Trump administration about getting this project constructed if they haven’t put the necessary funding in to keep it moving on schedule?” said Molly Flanagan, a vice president of the Alliance for the Great Lakes.