During that time, native salt marshes were drained and freshwater allowed to irrigate the site's grasslands.

Hinsdale Interpretive Center was built at a cost of $85,000 and was named after a Reedsport-area community leader.

The pasture (with some wetlands) covers about 440 acres (180 ha) of the area and is generally visible from the road.

The remaining 600 acres (240 ha) of the wildlife area comprise mainly conifer trees and other hardwoods.

In addition to the elk, beaver, muskrat, and Canada geese all spend some time at Dean Creek, as do coyotes, red-legged frogs, and the great blue heron.