Decades ago, developer James W. Rouse looked at a rundown industrial waterfront in downtown Baltimore and saw the makings of an attraction called Harborplace at the Inner Harbor.

Now a former Rouse employee looks at an expanse of woods in downtown Columbia and sees the possibility of an "Inner Arbor."

That's the name Michael McCall has given his proposal to turn 34 acres of woods surrounding Merriweather Post Pavilion into a place meant to celebrate both the arts and nature, a combination performing arts center, sculpture garden and elevated arboreal walkway.

"I was just talking to my wife, and I heard those words come out of my mouth," says McCall, recalling how the name Inner Arbor came to be. "And I thought, 'That's it, that captures the import of the place,' " said McCall, who hopes the new Symphony Woods will stand some day as the sort of regional visitor magnet that the Inner Harbor has become.

McCall's is the latest proposal to emerge over the past 20 years for an area often described as "Columbia's Central Park," a natural refuge set amid what planners have envisioned as an urban downtown. The park and downtown were part of Columbia founder Rouse's aspiration to transcend suburbia and build what he called a "real city."

About 45 years after Columbia's first residents moved in, construction on a long-range plan to create that city has recently begun, and with it comes greater focus on Symphony Woods. Until now, the undeveloped enclave has served chiefly as a place for people to stroll among the trees, perhaps have a picnic, and, since the early 1990s, attend Wine in the Woods in the spring and Symphony of Lights at Christmastime.

"This is where we can differentiate Columbia the most," said McCall. "The idea of an escape in the heart of the city."

At the moment, McCall's notion of supplanting the Central Park comparison with the Inner Harbor exists only on a map drawn up at no expense to the Columbia Association by McCall's firm, Strategic Leisure. Two public comment sessions have been held on the plan, yielding mixed opinion, and views range from enthusiasm to caution on the Columbia Association board, which has to approve the plan for it to go anywhere.

The CA is expected to discuss the subject at its meeting Feb. 14. One member said it could be voted on then, but others urge more time to answer questions from the public and board members. In any case, McCall acknowledges it would take years to complete what he's sketched out.

Howard County Executive Ken Ulman supports it, has said the county would back it financially, and mentioned in his State of the County message this past week the work on a plan to "turn Symphony Woods into the world-class cultural and arts space that Columbia and Howard County deserve."

But so far, nothing has been submitted for approval to county agencies and there's no formal estimate of the cost or a detailed plan to pay for it.

Evolving vision

The Inner Arbor plan adapts a few notions that have been floated over the years, and adds new ideas. The biggest structure inside the bounds of Symphony Woods would be built into a hillside slope with three levels, housing Toby's Dinner Theatre, a children's theater, a space for events, Columbia Association offices and a few restaurants.

An elevated walkway would lead to this "arts village" from a six-deck parking garage and transit center just to the east of Symphony Woods, where Toby's now stands.

Swinging over the pedestrian garage bridge, past the arts center and curving a few hundred feet to the north would be an element that has not been proposed before: a walkway raised into the trees, perhaps 40 feet off the ground. Braced along the way by seven "treehouses," the structure would amount to a smaller, woodland version of the High Line, a milelong "linear park" built on a portion of an old elevated train track in lower Manhattan.

An amphitheater with seating under the trees would be next to the elevated tree walk. At the southern end of the woods, a sculpture garden and walking paths would be developed along the existing man-made lake and natural stream.

This plan encompasses a bigger portion of Symphony Woods than several proposals offered since 1994, only one of which made it even halfway through the 16-step process for downtown Columbia development.

That plan, focused only on the northernmost 10 acres of the woods, called for three entrances at Little Patuxent Parkway: one in the center and in the northwest and northeast corners.

The central entrance — part of a cruciform paved walkway — led to a fountain plaza and eventually to the edge of the Merriweather pavilion.

Last July, the Planning Board approved this design as a Final Development Plan — a misleading term, as it's only Step 8 of 16 — and suggested a few changes.