US Army Corps of Engineers
Nashville District

Chickamauga Lock Replacement Project

FACT SHEET (As of February 2019)

Published Feb. 1, 2019
The Chickamauga Lock Replacement Project includes design and construction of a replacement 110-foot by 600-foot navigation lock to be located downstream of Chickamauga Dam on the Tennessee River in Chattanooga, Tenn., and riverward of the existing lock. (USACE Photo by Lee Roberts)

The Chickamauga Lock Replacement Project includes design and construction of a replacement 110-foot by 600-foot navigation lock to be located downstream of Chickamauga Dam on the Tennessee River in Chattanooga, Tenn., and riverward of the existing lock.

 Chickamauga Lock Replacement Project

US ARMY CORPS OF ENGINEERS BUILDING STRONG®

AUTHORIZATION:  Energy and Water Appropriations Act of 2003 (P.L. 108-7); reauthorized for the current total project cost in the America’s Water Infrastructure Act of 2018. 

TYPE OF PROJECT: Navigation Lock Project

LOCATION: The Chickamauga Lock Replacement Project is located at Mile 471 of the Tennessee River in eastern Tennessee.

CONGRESSIONAL INTEREST: Fleischmann, R-TN03; Alexander, R-TN, Blackburn, R-TN

NON-FEDERAL SPONSOR:

·   Inland Waterways Trust Fund (Inland Waterways User Board)

·   Tennessee Valley Authority (TVA) is the owner of locks and dams on the Tennessee River.  Navigation is managed by the U.S. Army Corps of Engineers.

BACKGROUND: The project includes design and construction of a replacement 110-foot by 600-foot navigation lock to be located downstream of the dam and riverward of the existing lock. Replacement lock construction began in 2004 with highway and utility relocations and continued through 2012 with the completion of the cofferdam structure and prefabricated components that are currently being stored at other Tennessee Valley Authority (TVA) facilities until needed.  After a temporary suspension of construction activities due to funding constraints with the Inland Waterways Trust Fund (IWTF), construction resumed after funding returned to the project in FY15.

IMPORTANCE: A new lock is required at Chickamauga Dam because of structural deficiencies of the existing lock resulting from physical expansion of the concrete structure.  This phenomenon of concrete growth was observed soon after initial construction in 1940 and is caused by a reaction between the alkali in the cement and the aggregate.  Even with significant maintenance efforts, this expansion threatens the structural integrity of the existing lock and limits its life. 

STATUS:

·   The $240 million Lock Chamber contract includes 13 total options; four options have been exercised through FY18 valued at approximately $95.7 million (exercised options are 22 percent complete). 

BUDGET ($): Estimated project costs are shown below.

Total Estimated Cost

$757,666,000

Funding Data

 

Allocation thru FY 2018 (Federal-General Appropriations)

$192,249,000

Allocation thru FY 2018 (IWTF)

$142,940,000

Allocation for FY 2019 (Federal-General Appropriations)

$ 76,245,000

Allocation thru FY 2019 (IWTF)

$13,455,000

Balance to Complete

$332,777,000

 

President’s Budget for FY 2020 TBD

 

SCHEDULE:

Completed Work: Highway relocations, steel lock gates and valves fabrication, concrete approach wall beam fabrications, and cofferdam construction are complete.

FY2019 Scheduled Work: Complete Lock Excavation and continue work on the Lock Chamber construction contract.

Completion: If funded efficiently, the lock construction is estimated to be completed in Dec 2024; however, funding delays will lengthen the project end date.

For more information regarding the Chickamauga Lock Replacement Project, contact Adam Walker, CELRN-PM, phone: (615) 736-5666 or email adam.c.walker@usace.army.mil