Reusing Dredge Materials for Habitat

Partner agencies are implementing a Long-Term Management Strategy (LTMS) for the Placement of Dredged Materials in the San Francisco Bay Region focused on reusing dredged materials in a beneficial way—for example, to restore wetlands.

The LTMS was developed in the 1990s by Bay Area regulatory agencies, resource agencies, and others, with the goal of reducing in-Bay disposal to encourage beneficial reuse of dredged material whenever possible. Participants in the LTMS effort  worked with the U.S. Environmental Protection Agency to establish the federally authorized Deep Ocean Disposal Site as another alternative to in-Bay disposal.  Many millions of cubic yards of dredge material are now being reused:

  • Sonoma Baylands: 322 acres, reused over 2.5 million cubic yards.
  • Carneros River Ranch (agricultural reuse): 540 acres, reused 0.7 million cubic yards to date, 2 million cubic yard capacity for ongoing reuse.
  • Middle Harbor Habitat Area (subtidal habitat, including eelgrass): 180 acres, reused 6 million cubic yards.
  • Montezuma Wetlands: 1,800 acres, capacity 12 million cubic yards; has already reused over 3 million cubic yards.
  • Hamilton Wetlands: 700+ acres, capacity over 8 million cubic yards, will have reused over 3 million cubic yards by the time the Oakland -50 foot Deepening Project is completed in 2008. “Unit V” will expand Hamilton to 2,000+ acres, 25 million cubic yards capacity.
  • San Francisco Ocean Beach: ~1 million cubic yards sand placed near shore for beach nourishment.
  • South Bay Salt Ponds represent a potential for additional reuse opportunities in the future.

Partner agencies are implementing a Long-Term Management Strategy (LTMS) for the Placement of Dredged Materials in the San Francisco Bay Region focused on reusing dredged materials in a beneficial way—for example, to restore wetlands.

The LTMS was developed in the 1990s by Bay Area regulatory agencies, resource agencies, and others, with the goal of reducing in-Bay disposal to encourage beneficial reuse of dredged material whenever possible. Participants in the LTMS effort  worked with the U.S. Environmental Protection Agency to establish the federally authorized Deep Ocean Disposal Site as another alternative to in-Bay disposal.  Many millions of cubic yards of dredge material are now being reused:

  • Sonoma Baylands: 322 acres, reused over 2.5 million cubic yards.
  • Carneros River Ranch (agricultural reuse): 540 acres, reused 0.7 million cubic yards to date, 2 million cubic yard capacity for ongoing reuse.
  • Middle Harbor Habitat Area (subtidal habitat, including eelgrass): 180 acres, reused 6 million cubic yards.
  • Montezuma Wetlands: 1,800 acres, capacity 12 million cubic yards; has already reused over 3 million cubic yards.
  • Hamilton Wetlands: 700+ acres, capacity over 8 million cubic yards, will have reused over 3 million cubic yards by the time the Oakland -50 foot Deepening Project is completed in 2008. “Unit V” will expand Hamilton to 2,000+ acres, 25 million cubic yards capacity.
  • San Francisco Ocean Beach: ~1 million cubic yards sand placed near shore for beach nourishment.
  • South Bay Salt Ponds represent a potential for additional reuse opportunities in the future.