Coos Bay is on the Oregon coast 200 miles south of mouth of Columbia River and 445 miles north of San Francisco Bay.

Coos Bay is about 13 miles long and 1 mile wide, with an area at high tide of about 15 square miles. The Corps maintains two jetties at the entrance: the south jetty, completed in 1928, and the north jetty, completed in 1929.

The original authorization allowed the Corps to maintain the entrance channel at 45 feet deep and 700 feet wide. A modification was authorized in the fiscal year 1996 Energy and Water Development Appropriations Act, Public Law 104-46, which provided for deepening the channel by 2 feet to 47 feet from the entrance to Guano Rock at river mile 1, and to 37 feet from river mile 1 to 15. Public Law 104-46 also provided for deepening by two feet and expanding the turning basin at river mile 12 by 100 feet from 800 by 1,000 feet to 900 by 1,000 feet.

The Corps of Engineers does not maintain recreation facilities at this location. Please stay off the jetties as they are hazardous and not intended for recreational use. Nearby and/or adjacent recreational facilities fall under the jurisdiction of private, local or state agencies. Learn more about jetties and why they are unsuitable for recreation at Understanding Coastal Jetties.

The U.S. Army Corps of Engineers (Corps) recognize the North Spit is a valuable resource, jetties are important for safety and repairs will support commerce activities in the area.

The North Jetty has lost a total of 1,121 feet from the jetty’s full authorized length. Since the mid-1990's the beach adjacent to the north jetty has receded landward by hundreds of feet exposing a non-substantial part of the jetty to wave attack and scour.

The Corps plans to repair the North Jetty, to include reconstruction of the head, repair of the trunk and reconstruction of a portion of the root. With reconstruction of a portion of the root, any fill action in Log Spiral Bay (LSB) will be deferred in the short term for monitoring. The effectiveness of the rebuilt jetty root will be monitored to determine if it is managing/reducing erosion on the LSB shoreline. The Corps completed an Environmental Assessment for these repairs and has published a Finding of No Significant Impact to move forward with repairs.