The details spell out the considerable scope of moving the national Boy Scouts of America Jamboree to Rockbridge County.

An island to be built in Lake Merriweather.

A need of 2.5 million gallons of water a day during the event.

An estimated 1,200 seasonal jobs.

Construction of 13 gravel access roads.

An initial capital investment of $100 million to $250 million.

It's no secret the Boy Scouts of America has its eyes on the county's Goshen area to become the next home for its national jamboree. That announcement came in February.

But what's been kept relatively quiet until now are the specifics on the BSA's plan to develop the 4,200-acre site to accommodate 40,000 Scouts and the accompanying leaders, volunteers and other guests every four years for the 10-day jamboree.

But a consultant's description of "Project Arrow" -- obtained by The Roanoke Times under the Virginia Freedom of Information Act -- reveals a list of specifics, the most significant of which includes the construction of a 100,000-capacity amphitheater or arena.

Only four college football stadiums in the country have more seating: Michigan, Penn State, Tennessee and Ohio State. FedEx Field, home to the NFL's Washington Redskins, seats about 92,000.

But the amphitheater plan has been scrapped, said Isaac Manning of Trinity Works, the site selection consultant for the project. Instead, developers are considering utilizing a floating barge as a stage. Until the Boy Scouts determine where on the lake a barge might be placed it is unknown how big it may be or how many people it may hold.

"The venue really doesn't matter," Manning said Wednesday evening at a community forum at Rockbridge County High School in Lexington. "It is about getting people together."

It is also about creating community, he said. But the community around Goshen has voiced opposition to the project -- and the amphitheater -- since the February announcement.

Manning said the Boy Scouts recognize an amphitheater may better suit the bowl-like geography at Fort A.P. Hill, where the jamboree currently is held, instead of the Goshen site with Lake Merriweather and the surrounding mountains.

Few, if any, events in Western Virginia have brought 100,000 people to one spot at one time. The jamboree is expected to bring in 250,000 people over the 10 days.

And that raises the excitement of those supportive of the project, and the concerns of those who worry about its potentially damaging effects.

An amphitheater or arena "doesn't fit with the type of sustainable project they have been touting this to be," said Jay Gilliam of Raphine, an opponent of the project. "I don't know why they would plan to build something like that and plan to use it only once every four years."

The Goshen site was chosen from 80 proposals in 28 states. Dinwiddie and Prince George counties in Virginia also submitted proposals.

Mark Sweeney of the Greenville, S.C.-based firm McCallum Sweeney Consulting -- the company that prepared the request for proposals to potential Virginia bidders -- said Wednesday the project's primary focuses are on a separate high adventure base in West Virginia as well as the jamboree site.

Plans for a 20,000-square-foot Boy Scout conference center, 10,000-square-foot museum and 6,000-square-foot visitors center on the Goshen site are on hold for now.

Four dining halls and 45 casitas, or small cabins, also are planned. An island "for programming activities" on Lake Merriweather, included in the site, is proposed, too, as well as a harbor, ferry service and a bridge spanning the lake.

At least one significant thing has changed since McCallum Sweeney issued the request for proposals in November: If the Goshen site is purchased from the National Capital Area Council, which has used it as a Boy Scout camp for more than four decades, the developers will not seek more land.

"Expanding the site size, that had been abandoned," Sweeney said.

While it could be an economic boon to the county, Gilliam and several others in opposition said they fear development will compromise the natural beauty of the area and pose environmental risks to the Maury River.