Baker Bay is a shallow body of water about 15 miles square, near the mouth of the Columbia River. The bay is separated from the river by Sand Island, a low-lying sand bar only a few feet above high tide level.
The bay houses wharves, floats, ramps, and berths, for fishing craft, barges and tow-boats. The small-boat basin and protecting breakwater provides moorings for numerous fishing and recreational craft year-round. The facilities are considered adequate for existing commerce.
Project Description
West Channel
Channel is 2,000 feet long, 200 feet wide, 16 feet deep
Thence A Channels is 2.5 miles long, 150 feet wide, 16 feet
East Channel
Channel is 4 miles long, 200 feet wide, 10 feet deep
At Ilwaco, Wash. is a 20-acre mooring basin 10 to 12 feet deep, protected by breakwaters.
The Chetco River flows into the Pacific Ocean at Brookings, Ore., 300 miles south of the mouth of the Columbia River and 345 miles north of San Francisco Bay.
The Chetco River rises in the Siskiyou Mountains of Oregon at an elevation of 4,000 feet, flows about 51 miles in a circuitous route before emptying into the Pacific Ocean.
The jetties, completed in 1957, and authorized dredging provide channel stabilization over the bar at the mouth of the Chetco River. Rock pinnacles and an abandoned bridge were removed in 1959. Modifications authorized in 1965 and completed in 1969 included an entrance channel 14 feet deep and 120 feet wide, increasing the elevation of the north jetty and extending it 450 feet. Construction of a protective dike, turning basin and small boat access channel was completed in 1970.
The Port of Brookings has two large boat basins, one for commercial fishing boats and the other for sport boats, and a public boat launching ramp. There are four fish receiving docks and a sea-going barge dock for lumber loading and storage, as well as a U.S. Coast Guard Station and a privately owned marina.
Navigation channel is 14 feet long and 120 feet deep.
Turning basin is 650 feet long, 250 feet wide, 14 feet deep.
Commercial boat basin access is 200 feet long, 100 feet wide, 12 feet deep.
Project Description
North Jetty is 1,350 feet long
South Jetty is 1,250 feet long
Protective dike is 1,800 feet long and 18 feet high
Nehalem Bay is located 40 miles south of the Columbia River.
USACE constructed two jetties to stabilize the channel across the ocean bar at Nehalem Bay's entrance. The north jetty was built in 1918, to a length of 3,890 feet; the south jetty, built in 1916, was 4,950 feet long.
The structures were rehabilitated in 1981 and 1982 after decades of strong water and wave action removed large boulders and underwater currents displaced smaller stones. Corps contractors placed more than 347,000 tons of rock at the tips of both jetties. The boulders used in the repairs weighed more than 40 tons each – at the time, the largest ever placed on an Oregon jetty.
Project Description
North Jetty is 3,890 feet long.
South Jetty is 4,950 feet long.
Tillamook Bay is on the Oregon coast, 50 miles south of the Columbia River.
The Army Corps of Engineers owns and maintains two jetties at Tillamook Bay’s entrance. The north jetty was constructed first in 1914 with south jetty construction beginning decades later in 1969. The Corps has made repairs to both jetties due to damage from the Pacific Ocean’s powerful waves continually smashing against them.
The north jetty was reconstructed and extended it to its full, authorized 5,700-foot length in 1931. In 2004, The Corps constructed a revetment to help prevent shoreline erosion and protect the vulnerable north jetty root. Corps contractors rebuilt the north jetty head in 2010, stabilizing the jetty at 5,213 feet. The repaired head is broader, higher and more substantial to withstand the powerful waves. The stones used for the repairs weigh between 25 to 50 tons each.
The south jetty was authorized in 1965 with completion of the first segment in 1971. The Corps completed the second segment in 1974 and the third and final segment in 1979. The 1,500-foot third segment brought the south jetty to its full authorized length of 8,000 feet.
USACE maintains an 18-foot-deep channel over the ocean bar at the entrance to Tillamook Bay; an 18-foot-deep, 200-foot-wide, three-mile-long channel to Miami Cove; a turning basin at Miami Cove; and a 12-foot-deep access channel to the Garibaldi small-boat basin. The Corps’ navigation authority includes protection of Bayocean Peninsula to preserve the present entrance channel to the bay. For that purpose, a 1.4-mile-long dike was constructed to close a breach in the peninsula between Pitcher Point and the abandoned town of Bayocean. The channel to Miami Cove was completed in 1927, the Bayocean dike in 1956, and the small-boat basin of Garibaldi in 1958. The 18-foot channel to Miami Cove is inactive due to a mill closure.
Project Description
Entrance:
Channel is 5,000 feet long, 18 feet deep, and has no prescribed width.
North Jetty is 5,213 feet long.
South Jetty is 7,094 feet long.
From deep water in the bay to Miami Cove:
Channel is 3 miles long, 200 feet wide, and 18 feet deep.
Turning basin is 2,500 feet long, 500 feet wide, and 18 feet deep (currently inactive).
Garibaldi:
Small boat basin is 12 feet deep.
Approach and channel is 12 feet deep.
Bay Ocean Peninsula:
A sand- and rock-filled dike extends 1.4 miles between Pitcher Point and the town of Bay Ocean.
Skipanon Channel is a tidal waterway extending south 2.7 miles from deep water in Columbia River. The channel enters the Columbia River about 10 miles above the Columbia River's entrance bar, and 4 miles below Astoria, Ore.
The Skipanon Channel serves the city of Warrenton, Ore., which owns a 300-foot public wharf. A small-boat basin has facilities for numerous fishing and recreation craft.
The channel from the Columbia River to the railroad bridge at Warrenton is 1.8 miles long, 200 feet wide, and 30 feet deep.
The turning basin is 30 feet deep.
The mooring basin is 12 feet deep.
Above the railroad bridge, the channel is 4,500 feet long, 40 feet wide (with increased widths at log dumps and terminals) and 6 feet deep.
The federal navigation channel at the mouth of the Columbia River is six miles long and lies between two jetties. It was first authorized in 1884.
The Corps operates and maintains three jetties and the navigation channel that serves as the border between Washington and Oregon. The north jetty, built from 1913 to 1917, is 2.5 miles long. Jetty “A” was built in 1939 and is 0.3 miles long. The north jetty and jetty “A” are on the Washington side of the mouth. South jetty, built between 1885 and 1895, is 6.6 miles long and on the Oregon side of the mouth.
Many areas of each structure have been severely damaged due to the extreme waves of the Pacific Ocean interacting with the Columbia River. The structures are routinely exposed to ocean waves ranging from 10 to 20 feet high. Increased storm activity and the loss of sand shoal material upon which they are built have taken a toll on the structural integrity of the jetties. The Corps is working to restore the system to acceptable levels of reliability.
Previously interim repairs were completed for the North and South Jetties from fiscal year 2005 to 2007. The North Jetty interim repair was completed in November 2005 with 58,000 tons of stone placed over 3,000 feet. The South Jetty interim repair was completed in September of 2007 with 168,000 tons placed over 5,300 feet. South Jetty Reach A was finished in 2006 with 82,000 tons of stone placed over 2,200 feet and Reach B was completed in 2007 with 86,000 tons placed over 3,100 feet. Jetty A rehabilitation was completed in 2016.
The Corps completed the Columbia River Channel Improvements Project in November 2010. The project deepened the Columbia River by three feet, to 43 feet along a 103-mile stretch of river from the Pacific Ocean to Portland, Ore. The project took 20 years to complete and was a collaborative effort between the Corps and six lower Columbia River ports (Portland, Vancouver, Kalama, St. Helens, Longview and Woodland). The project improved navigation by deepening the channel to accommodate the current fleet of international bulk cargo and container ships and to improve the condition of the Columbia River estuary through the completion of other environmental restoration projects.
The navigation channel is important to the regional and national economy. The Port of Portland estimates more than 40,000 jobs along the lower Columbia River are dependent upon seaport activity. Seaport activity in the regions of the lower Columbia generates $208 million in state and local tax revenue and contributes 10 percent toward the state of Oregon’s gross product. About 1,000 firms export goods via the lower Columbia River and all of these goods must exit the Mouth of the Columbia River.
The Columbia River bar is the second-most treacherous in the world and the most treacherous in the United States. By maintaining the channel to its authorized depth, the work ensures safer passage for commercial and recreational vessels.
The project can only be dredged during the calmer weather between June and early November. Up to 5 feet of allowable over-depth dredging may be accomplished in order to ensure authorized project depth in between dredging cycles. In some locations 1-2 feet of additional depth may be removed or otherwise disturbed during the dredging process.
Project Description
Main Channel
Channel A (north reach) is 6 miles long, 2,000 feet wide and 55 feet deep.
Channel A (south reach) is 6 miles long, 640 feet wide and 48 feet deep.
Jetties
North Jetty is 2.5 miles long.
South Jetty is 6.6 miles long.
Spur Jetty A is 0.3 miles long.
The Old Mouth of the Cowlitz River channel at Longview, Wash. is authorized to 8 feet deep and 150 feet wide, from deep water in the Columbia River through the Old Mouth of the Cowlitz River, to a point about 3,000 feet upstream from the old harbor line.
The navigation channel supports commercial barges shipping 288,000 tons of wood chips per year. Those chips are used to produce 144,000 tons of products worth over $84 million.
The vertical plane of reference is adopted low water. The project is subject to tidal influences and annual river freshets. A large shoal regularly forms at the Old Mouth of the Cowlitz River where it meets the Columbia River. Dredging by a contract clamshell dredge is required every 2-to-3 years to allow adequate depth for commercial barge traffic.
This shoal was last dredged by the Corps in 2002 and the material was placed at an in-water site. Limited advanced maintenance width dredging outside the authorized channel width and up to 2 feet of advanced maintenance dredging below the authorized channel depth is practiced in order to maintain adequate depth for commercial barges between dredging events.
Project Description
The authorized channel is 8 feet deep and 150 feet wide, and spans from deep water in the Columbia River at Columbia River Mile 67.5 through the Old Mouth of the Cowlitz River, to a point about 3,000 feet upstream from the harbor line at the time of authorization.