Eureka in Humboldt County, California — The American West (Pacific Coastal)

Humboldt Bay Jetty Dolos

By Cosmos Mariner, June 23, 2016

1. Humboldt Bay Jetty Dolos Marker

Inscription. Click to hear the inscription.

This dolos, weighing 42 tons, the 1,972nd of 4,796 cast by the Umpqua River Navigation Company for the reconstruction of the Humboldt Bay Jetties, is dedicated to the seafaring men of Humboldt — past, present, and future.

Dated December 28, 1972

Topics. This historical marker is listed in this topic list: Waterways & Vessels.

Location. 40° 47.31′ N, 124° 10.825′ W. Marker is in Eureka, California, in Humboldt County. Marker is on Broadway Street (Redwood Highway) (U.S. 101) south of West Hawthorne Street, on the right when traveling south. Marker and subject dolos are located near the sidewalk on the north side of the Harbor Lanes parking lot. Touch for map. Marker is at or near this postal address: 2136 Broadway Street, Eureka CA 95501, United States of America. Touch for directions.

Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies. Fort Humboldt (approx. 0.9 miles away); Saint Innocent of Alaska (approx. one mile away); Eureka Free Public Library (approx. 1.1 miles away); Eureka Inn (approx. 1.1 miles away); Sequoia Hose Company No. 6 (approx.

Humboldt Bay Jetty Dolos image. Click for full size.

By Cosmos Mariner, June 23, 2016

2. Humboldt Bay Jetty Dolos

1.1 miles away); First National Bank/Professional Building (1918) (approx. 1.2 miles away); Eagle House (approx. 1.2 miles away); The former Fairwind (approx. 1.2 miles away). Touch for a list and map of all markers in Eureka.

Regarding Humboldt Bay Jetty Dolos. In 1977 the jetties were named an American Society of Civil Engineers California historical civil engineering landmark. They were designated in 1981 as a national historical civil engineering landmark.

Also see . . .
1. Humboldt Bay (Wikipedia). In 1971 and 1984, 42 ton dolosse were added in two layers to secure the jetties, which are maintained by the U.S. Army Corps of Engineers. In 1972, 4,796 dolosse were manufactured locally; 4,795 of them are on the jetties, and one was installed outside the Eureka Chamber of Commerce. In 1983, 1,000 more dolosse were made at the South Spit yard. In 1985, 450 of the dolosse were shipped 35 miles around the bay to be placed on the North Spit. (Submitted on January 3, 2021, by Cosmos Mariner of Cape Canaveral, Florida.)

2. Treacherous Maw: How two jetties, even a-crumble, shape Humboldt Bay and our lives. Humboldt Bay was

By Cosmos Mariner, June 23, 2016

3. Humboldt Bay Jetty Dolos & Marker

the first place the dolosse were used in America; they were introduced here by engineer Orville Magoon, who designed the latest Humboldt jetties. The Corps of Engineers piled 5,000 42-short-ton dolosse around the jetties' heads, and in 1977 dubbed the two structures a historical civil engineering landmark. In 1985, the Corps dumped another 1,000 dolosse on the jetties. The dolosse-reinforced heads have held steady; combined with annual maintenance dredging of the bar, entrance and inner bay channels, they provide a predictable and relatively safe passage for vessels. (Submitted on January 3, 2021, by Cosmos Mariner of Cape Canaveral, Florida.)

Credits. This page was last revised on January 3, 2021. It was originally submitted on January 1, 2021, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 46 times since then. Photos: 1, 2, 3. submitted on January 3, 2021, by Cosmos Mariner of Cape Canaveral, Florida.