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Alternatives and Options for Restoration

Select the letters or scroll down to see explanations of the options for restoration.
For quantatative details, see slide 7 of the Army Corps of Engineers' slide show.

A. Seadrift Lagoon

Four variations:

  1. Open the Seadrift Lagoon to tidal flushing by placing larger culverts at the two existing culvert locations.
  2. Create two 20-foot open channels.
  3. Open only the northwest end of the Seadrift Lagoon to tidal flushing.
  4. No change.

B. South Lagoon Channel

Connect the Main Channel to the eastern culverts of Seadrift lagoon.

C. North Basin

Restore a basin in the northern end of the lagoon to increase intertidal and subtidal habitat. Creation of the basin would also help to maintain the Main Channel.

D. Main Channel

Ensure that sufficient flow reaches the north end of the lagoon. Involves deepening four sections of the existing channel and removing an island.

E. Bolinas Channel

Remove sediment from the channel that runs between Kent Island and the town of Bolinas. Sediment would be removed from the inlet of the Lagoon around Kent Island and up to the Pine Gulch Creek Delta.

F. Highway One Fill Areas

Remove fill in up to ten areas that currently constitute turnouts, fill disposal sites, and excessive shoulder material.

G. Dipsea Road Fill Area

Remove fill along the east side of Dipsea Road.

H. Kent Island

Restore the historic channel system through Kent Island that was last evident in historic photographs from the 1940s. The main portion of the channel would be 200 feet wide, with three sub channels of 75 feet in width. This alternative involves reducing the island's elevation and size.

I. Pine Gulch Creek Delta

Remove sediments at the delta of Pine Gulch Creek that have accumulated over time.

Do Nothing

A no action alternative will also be considered in the environmental review process.

How are the alternative(s) selected?

The U.S. Army Corps of Engineers and the Marin County Open Space District selected a Habitat Evaluation Panel to review various restoration alternatives. The panel comprises scientists and habitat specialists representing a broad spectrum of local and national interests, including the College of Marin, Audubon Canyon Ranch, Pt. Reyes Bird Observatory, Golden Gate Recreational Area, Pt. Reyes National Seashore, the Gulf of the Farallones National Marine Sanctuary, California Dept. of Fish and Game, Regional Water Quality Control Board, U.S Geological Survey, and U.S. Fish and Wildlife Service.

Will an Environmental Impact Report be prepared?

Yes. Elements of a draft environmental impact report and environmental impact statement (DEIR/DEIS) are already underway. The DEIR/DEIS will analyze the preferred alternative(s) and will include mitigation measures to reduce or eliminate impacts resulting from the restoration activities.

The DEIR/DEIS will be available for public review in the Spring of 2001, and numerous public hearings will be held in the Spring and Summer to ensure that all questions and concerns are answered. The Final EIR/EIS must be certified in separate public hearings by the Marin County Parks, Open Space, and Cultural Commission; the County Planning Commission; and the Board of Directors of the Marin County Open Space District. All of these hearings will be open to the public and you are encouraged to attend and contribute to the discussion.