Mainstream Commercial Divers, Inc. Lock, Dam, and Power Plant Services

Lock, Dam, and Power Plant Services

Mainstream Commercial Divers, Inc. has performed numerous diving operations at Locks and Dams and Power Plants all across the United States. Some of these projects have included:

Diving for the Construction of New Locks and Dams
Inspection and Cleaning of Crib Houses, Intakes, etc.
Setting Bulkheads and Stop Logs
Inspection and Cleaning of Draft Tubes
Spillway Gate Inspections
Scour Hole Investigations and Repair Projects
Deep Dives Requiring Decompression Chamber
Mapping the Faces of Dams for Irregularities
Hydrographic Soundings
ROV Inspections

If you have any questions regarding our services, capabilities, or experience, please do not hesitate to call us.

MCDI Performed a Blade Recovery Project at Stockton Dam

CASE STUDY: USACE Kansas City District Draft Tube Inspection and Recovery of a Broken Section of a Turbine Blade

Mainstream Commercial Divers, Inc's first role on this project was to perform the initial inspection that discovered the broken turbine blade. After the inspection, Mainstream was selected by the USACE Kansas City District to recover the broken blade section. This deep water diving job required the use of Mainstream's company owned decompression chamber.

A Few Recent Dam Projects Include:

Arthur V. Ormond Lock and Dam inspection and repair project in 2011-2011which included: measuring and mapping cracks in one of the monoliths of the dam utilizing a diver and underwater video; cleaning of the underwater crack surfaces and beveling the edges of the cracks to expose fresh concrete; sealing the cracks using an underwater epoxy applied by hand by divers; performing a final underwater video for the client and the Little Rock District of the USACE.

MCDI assisted the general contractor by providing a dive crew to perform underwater near term repairs to Lock and Dam No. 10 on the Kentucky River. MCDI’s work on this project included retrieving sections of 4” steel pipe, underwater cutting of #6 rebar, underwater concrete form installation, placing concrete underwater, cutting retainers from the concrete forms underwater, placing sandbags within the forms underwater, and the inspection of the river bottom and existing concrete blocks.

Dam inspection and the recovery of a broken section of a turbine blade at Stockton Dam.

MCDI performed all of the diving work beginning in 1997 and extending through 2004 for the construction of the new Montgomery Point Lock and Dam.

Diving work for the new Kentucky Lock and Dam project, which is one of the largest public works projects recently undertaken in the United States (CJ Mahan and Nashville USACE).

Underwater inspection and repair of two scour holes for Arkansas Electric Cooperative Corporation’s Wilber D. Mills Dam in Dumas, Arkansas.

Mapping the spillway face of the Norfork Dam for irregularities. This was a USACE Little Rock District project.

Diving work for a renovation project at Murray Hydroelectric Dam in North Little Rock, Arkansas in which Mainstream installed twenty Williams Rock Bolts.

Various other projects at numerous other large and small dams.

CASE STUDY: Underwater inspection and repair of two scour holes for Arkansas Electric
Cooperative Corporation

Following an inspection by Mainstream divers, MCDI worked with dam officials to develop a remediation plan to repair two underwater voids. The project consisted of three weeks of daily diving operations water depths greater than 80 feet with near freezing air temperatures and poor visibility in the Arkansas River.

The project required a total of 807 cubic yards of grout to be pumped underwater in order to fill two voids under the power house.

This deep water diving job required the use of Mainstream's company owned decompression chamber.

Extensive Training

In addition to outside training, we have an extensive in-house training program that includes:

Underwater Construction Techniques
Rigging
Inspection Techniques
Underwater Video Inspection Methods
Underwater Cutting Procedures
Documentation of Findings
Safe Working Procedures
Underwater Coatings Application
Contaminated Diving Procedures
First Aid/CPR and O2 Administration Training

CASE STUDY: Montgomery Point Lock and Dam Construction

Mainstream Commercial Divers, Inc. performed all of the diving work beginning in 1997 and extending through 2004 for the construction of the new Montgomery Point Lock and Dam.

Mainstream's work on this project involved many tasks including performing an underwater inspection of the sheet piles of the cofferdam, cutting pilings to grade underwater, tremie pouring of concrete, inspection work at different periods throughout the project, demolition of concrete, survey work, salvage work, and emergency callouts.

This was a USACE Little Rock District project. This deep water diving job required the use of Mainstream's company owned decompression chamber.

Certified Decompression
Chamber Operators

Several of MCDI's Diving Supervisors are certified decompression chamber operators.

MCDI's company-owned decompression chambers are valuable assets when the project requires diving operations at deeper depths.

MCDI has also supplied our decompression chamber and an operator to the USACE Nashville District Dive Team on several occasions.

CASE STUDY: Kentucky Lock and Dam Construction

Mainstream Commercial Divers, Inc. performed all of the diving work for the construction for the new lock at Kentucky Dam and the associated railroad and highway bridges for the USACE Nashville District.