USACE: Rock Removal at Lock 15

The U.S. Army Corps of Engineers, Rock Island District, which oversees operations and maintenance of Locks and Dam 15, mobilized a maintenance crew to address structural concerns on the downstream guidewall.

According to Aaron Dunlop, Operations Project Manager for the Rock Island District’s Mississippi River Project, four monoliths making up a portion of the guidewall are being demolished as the failing concrete is creating risk to the navigation system.

The demolition work, which should not affect barge traffic, began Saturday and will continue for approximately two weeks.

“The lower 120 feet of the guidewall is structurally failing, which could result in it falling into the navigation channel,” Dunlop said. “If it were to fall into the channel, this would block navigation for nearly a month as crews would need to respond to remove the broken concrete blocking access to the lock chamber.” 

Dunlop also said that his crew has been working with a team of Rock Island District engineering and operations staff. After close monitoring of the guidewall section, the team determined the best course of action was to proactively remove the concrete to prevent it from falling in an uncontrolled manner. He added that the demolition is the temporary fix. A contract for permanent repairs will likely be awarded later this summer.

The section of guidewall that is being demolished is original to the project. Locks and Dam 15 was the first lock completed on the Upper Mississippi River as part of the 9-foot navigation system. Construction at Locks and Dam 15 finished in 1934, and the intended design life of the lock was about 50 years.

According to Mike Cox, Chief of the Rock Island District’s Operations Division, locks like those at Locks and Dam 15 have outlived their design life due in most part to adaptive maintenance and periodic major rehabilitation.

Share this article

Follow Dredging Today


<< Oct 2019 >>
30 1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31 1 2 3

3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews ( holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee:

read more >


Dredging jobs in Abu Dhabi at NMDC

National Marine Dredging Company “NMDC” aims to be the largest dredging player in the Arab’s Gulf region...


Looking to fill a job opening?

By advertising your job here, on the homepage of, you'll reach countless professionals in the sector. For more information, click below....


Looking to fill a job opening?

By advertising your job here, on the homepage of, you'll reach countless professionals in the sector. For more information, click below...