Two other alternatives would use barriers to cut off some of the aquatic pathways while deploying additional electric barriers, screened gates, locks and water treatment plants.
and take 25 years to complete. Army Corps of Engineers declined to endorse a single plan after studying the matter since 2009, disappointing sponsors of legislation that ordered the agency to move faster. Instead, the Corps provided a 232 page analysis with eight possible approaches.
American Waterways Operators, a group representing barges and tugboats in the Chicago area, said the report makes clear that physical separation neither economically feasible nor will it be effective at eliminating all identified pathways for the spread of invasive species, including Asian carp.
TRAVERSE CITY, Mich. A federal agency sent Congress a list of alternatives Monday for shielding the Great Lakes from an invasion by Asian carp that could devastate native fish, including construction projects in Chicago waterways that could cost more than $18 billion Nike Shoes Women 2018
The options achieving the greatest degrees of physical separation tend to be most expensive and time consuming, with costs reaching $15 billion to $18.4 billion and a 25 year timetable. That because they would require extensive reworking of Chicago flood control and sewage treatment systems in addition to building the dams, Wethington said.
FILE In this June 13, 2012 photo an Asian carp, jolted by an electric current from a research boat, jumps from the Illinois River near Havana, Ill., during a study on the fish population. Army Corps of Engineers released a report on Monday, Jan. 6, 2014, years in the making, about options for keeping Asian carp from invading the Great Lakes. The report focuses on the Chicago Area Waterway System and its network of rivers and canals that provide a direct link between Lake Michigan and the Mississippi River. (AP Photo/John Flesher, File)
One could be carried out in 10 years and cost $7.8 billion, a relative bargain. It would create a zone with a series of control technologies.
providing this information to the decision makers, Wethington said in a phone conference. are standing by to move forward to the next step. Great Lakes and Mississippi watersheds share a boundary nearly 1,500 miles long. But the study focused on a network of rivers and canals in and near Chicago with five direct links between the two giant drainage basins, considered the likeliest route by which Asian carp could reach the lakes.
Aside from doing nothing new, the cheapest approach would step up use of existing measures such as netting carp and treating the water with chemicals, at a cost of $68 million a year.
The report also offers two middle of the road alternatives that would maintain Nike Shoes Childrens
They escaped during floods and have migrated up the Mississippi and Ohio rivers and tributaries in more than two dozen states. Scientists say they can destabilize ecosystems by devouring plankton, a vital link in aquatic food chains. Sen. Debbie Stabenow, a Michigan Democrat, and Rep. Dave Camp, a Michigan Republican, said the Corps should have picked one approach and developed it more thoroughly. They favour separating the two watersheds and sponsored a bill that would do that.
Other proposals would use different mixtures of equipment and technology, including construction of additional electric fish barriers and a new type of navigational lock that would treat water to remove floating plants and fish as vessels move through the system.
The Corps said the measures in its report could shut down pathways for 13 potential animal and plant attackers, from the bloody red shrimp to reed sweetgrass and a deadly fish virus. But public and congressional interest is riveted on bighead and silver carp voracious Asian fish imported in the early 1970s to gobble algae Nike Shoes Canvas Casual in Deep South fish ponds and sewage plants.
Dave Wethington of the Corps Chicago district office, project manager for the study, said battling invasive species is shared responsibility that will require support from Congress and state governments, which would have to settle on a strategy and provide the money.
Army Corps report offers 8 alternatives to keep Asian carp out of Great Lakes
Two would place dams in the Chicago waterway system to seal off Lake Michigan from the carp infested Mississippi River watershed. Environmentalists and five states that unsuccessfully sued the Corps in federal court favour that approach, while Illinois, Indiana and local shipping interests oppose it.
Bighead and silver carp are a big concern for the Great Lakes because they could threaten a fishing industry valued at $7 billion a year. Also, silver carp are notorious for springing from the water when disturbed by motorboats and colliding with their occupants, posing a risk to outdoor recreation.
The Chicago waterways are connected to the Illinois River, where a large carp population has advanced to within 55 miles of Lake Michigan. The Corps says an electric barrier 37 miles from the lake is preventing any individuals from slipping through. Scientists have detected Asian carp DNA in dozens of water samples past the barrier, although whether they came from live fish remains in dispute.
the waterway system current shipping operations. Nike Shoes Gold Tick
only real solution that will truly protect the Great Lakes is the complete separation of the Great Lakes and Mississippi River, said Rep. Candice Miller, a Michigan Republican.
Two options in the Corps report would achieve that by placing barriers along the Lake Michigan waterfront or farther inland. Both would severely disrupt commercial shipping and pollute the lake by preventing Chicago sewer discharges from flowing downstream as they do now, the report said.
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