Liquid Engineering Corporation (LEC) traces its roots back to 1972 when its predecessor, Montana Logging and Salvage, was organized to undertake underwater logging and salvage activities in the Pacific Northwest.  LEC evolved into a potable water diving contractor with the development of this specialized field.  As a result of the company’s rapid expansion, innovation and track record, our 25,000 clients have increasingly requested a broader array of services and support.

LEC provides creative, efficient solutions and cutting-edge technology to meet each client’s unique water tank maintenance requirements. We are the largest in-service water tank inspection firm in the United States.

Our Services

In-service water tank


Clearwell and reservoir cleaning

Inspection, maintenance

Full range of collaborative engineering services.


Our Team

Maintain a top secret security clearance

Routine vetting by FBI for various Federal contracts

Referral resource for security consulting services and support

USDOT and DOD drug testing program

Identity, drug and criminal background checks of all field employees

Extensive experience with the Department of Defense, DOE, NRC, USEPA, TSA, USACE, and Department of Interior

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