A log house on six riverfront acres went for just under $185,000 after four months on the market.

Nine riverfront acres facing the Manhattan skyline, between two grand bridges and including historic structures that could be recycled, it offers urgently needed green space to relieve the density of downtown Brooklyn.

"I learned this past week that I'm a dinosaur," Mr. Rednour said yesterday, taking a final drag during his final cigarette break outside the complex of brick and concrete buildings that stretches across more than 11 riverfront acres just north of the Williamsburg Bridge.

His company recently bought a four-building, 240,000-square-foot office complex on 20 riverfront acres next to the stadium.

In Sleepy Hollow, General Motors has not yet announced plans for its 97 riverfront acres, the site of a plant that closed in 1996.

The plan calls for the National Park Service to acquire about 1,000 riverfront acres here, with bluff-top vistas of the broad twists and curls of the Mississippi to the north and the flat plantation land of Louisiana to the west.

In April 2009, members of Cowlitz County Deserves Better launched a broad, 6-month investigation into the operational and environmental practices of Chinook Ventures, a private company operating on several hundred riverfront acres owned by Pennsylvania-based aluminum multinational corporation Alcoa, Inc.

A 20-unit town house community and marina has been approved for construction on two riverfront acres previously reserved for industrial uses on South Water Street.

Specific development plans include the renovation of the building itself for a museum and the adjacent 17.5 riverfront acres into a public park.

The move by the city's Police Department to the building from its current site along the Raritan River will free 18 prime riverfront acres to development, said Glenn S. Patterson, director of New Brunswick's Department of Policy, Planning and Economic Development.