BRATTLEBORO - It will take more than a life jacket and paddle to navigate through the choppy waters ahead for local whitewater groups and the Vermont Agency of Natural Resources.

Boating and rafting organizations have gone after the agency and the U.S. Army Corps of Engineers for curtailing the local economy by lessening the water releases from the Ball Mountain Dam in Jamaica. But the corps and ANR are on the defensive, saying the goal is to minimize any adverse effects to aquatic habitats downstream, not to make the waters inaccessible to recreational users.

Every year, the Corps schedules two separate flow releases - one in April and the other in September - on the West River for hundreds of rafters, kayakers, canoeists and other whitewater zealots. The events generate hundreds of thousands of dollars in the region, according to an economic impact study sponsored by American Whitewater and other advocacy groups.

Kevin Colburn, national stewardship director with American Whitewater, said altering the release schedule will have a negative impact on local restaurants, inns and rafting ventures during an already difficult economic span.

"We have heard that tourism in Vermont has been affected by higher fuel costs and reduced spending," he said. "These are not the economic times for local businesses to get hit with the withdrawal of a huge stimulus from such a large event."

Colburn and other groups authored a media release Monday morning to review the local financial repercussions by the "closure of scheduled releases." The release does not include a rebuttal from the ACOE or the ANR.

Whitewater enthusiasts cried foul after the engineers announced changes to the spring release times in October 2008, sparking outrage in the kayaking and rafting blogs.

For almost three decades, the engineers have released the water on the last weekend in April, but pushed it ahead of schedule two weeks to assist in the survival of the salmon smolt migration. The decision was made jointly by both the state and federal Fish and Wildlife Services, as well as the Connecticut River Atlantic Salmon Commission to set the winter conservation pool requirement at 25 feet to allow an appropriate level for traveling downstream.

In a letter to whitewater organizations, ACOE Construction/Operations chief Richard C. Carlson said the decision was based on studies demonstrating the water temperature changes indicate that delaying the release would have unfavorable effects on the smolt migration.

Brian Fitzgerald, an ANR ecologist based in Waterbury, said the move "created quite a lot of excitement in the whitewater rafting community last spring." Severe miscommunication prevented the agency and the advocacy groups from properly scheduling a date suitable for everyone, but the Corps put out a notice at least two years ago that the releases were being shifted two weeks ahead of time, he said.

Bruce Williams, the Corps' district natural resource manager, said the groups were offered three scenarios, but were not satisfied with any of the options.

Colburn told the Reformer last November the issue is more about the mechanics of the dam, noting the primary factor for controlling the timing of the spring release is to elevate levels for migration rather than the flows of the river from the Ball Mountain Dam.

Both sides have also butted heads over the autumn release for years.

The September release was decreased to one day in 2003 to reduce the environmental impact by setting new ramping standards. Before that time, the fall release consisted of two days and a flurry of recreational activity in the region.

Those changes, according to Fitzgerald, are the result of a lengthy conversation with the ACOE, the agency and fish and wildlife services about the dam operations' effect on aquatic life and habitat.

"There's a good body of information of scientific literature about the sudden unnatural changes in flow, both sudden increases and sudden decreases," said Fitzgerald. Boaters would have to produce some creditable data to accommodate their desires, he added.

But Charles Still of Friends of the West River said the ANR has not completed studies on the occasional scheduled releases for the river in question. Pressured to cite examples, the agency shared studies done on similar rivers with daily variation in flow, he said.

Still, a member of both Friends and American Whitewater, requested the ACOE studies that aided in the release changes, but said the groups have not received a response.

"Nobody wants to do anything that will hurt the environment in any way, especially the kayakers," Still said in a previous interview, but the spring release does bring thousands of people to the West River for the big event.

Paddlers typically enjoy the water pressure at 1,500 cubic feet per second, but Williams said that is too much for a release any longer than a single day. To potentially move back to a two-day event, ACOE could have smaller releases over a lengthier duration.

"The only way it could be pushed into a longer event is to reduce the outflow throughout the entire event," said Williams. "I think that would allow for a longer race event."

Still said the fall release, which once hosted the Olympic kayaking trials, is based on weather, because a heavy rain or flood could cause the ACOE to make a similar size release during the groups' preferred times. "This past weekend, Oct. 25, saw a huge rain event where the flow rapidly ramped on the river, periodic cycle of increased flow down any river basin is a normal event."

According to the Friends of the West River, even Gov. James Douglas has thrown in his two cents.

The governor said in a Sept. 30 letter to the organization, "although it can be difficult to satisfy the various interests who care deeply about an issue such as this, I will continue to ask the professionals at the Agency of Natural Resources to carefully examine the science and thoughtfully consider the inputs of all interested parties."

Advocate groups are working to restore the scheduled flows, but stated clearly in an Oct. 26 release that their attempts are ignored, but the ACOE usually meets annually with members to hear concerns about the whitewater releases.

"Hopefully we can meet with them and find a time that's suitable for everybody," said Williams. The Corps is not looking to stop anybody from using the river recreationally, but to find a compromise that works for both sides, he added.

Chris Garofolo can be reached at cgarofolo@reformer.com or 802-254-2311 ext. 275.