Location
Mississippi River & Illinois Waterway Locks and Dams
Description
The Major Rehabilitation and Major Maintenance Program for the Locks and Dams on the Mississippi River and Illinois Waterway has been ongoing since 1975. Major rehabilitation consists of reliability or efficiency improvements. Reliability improvements are considered when they significantly extend the physical life of a component, have direct consequences to navigation and ecosystem, and can be economically justified by benefit-to-cost analysis. The region focuses on this method of major rehabilitation. Efficiency improvements are considered if they enhance the operational efficiency of the component.
Major maintenance is categorized as major repairs or improvements that don't qualify for major rehabilitation and must be funded out of the regular O&M Budget. The remainder of the regular O&M Budget dollars are used for baseline (routine) operation and maintenance. Through use of Asset Management tools, O&M funding is being targeted from a corporate posture to the structures with the highest risk and probability of failure in alignment with impact costs to navigation. Through this focused funding model, local funding is increasing within Rock Island District due to the overall need and risk of Lock and Dam Structures. These funds support component life extensions and focus on reliability vice significant facility life extensions.
Although targeted funding for component replacement increases near term reliability, facility life extensions are critical for system long term durability.
Major Maintenance of Mississippi River and Illinois Waterway Locks and Dams
L&D Components not justified for Major Rehabilitation and consequence of not doing work:
- Lock Miter Gates: Miter gate failure would cause closure of locks to all navigation and shipments.
- Auxiliary Miter Gates: Continued deterioration and potential loss of pools for navigation and ecosystem sustainability.
- Lock and Dam Electrical Systems: Electrical failures cause temporary power outages to lock and dam operating machinery. Such failures would impact lock operation as well as pool regulation for navigation and ecosystem sustainability.
- Repair Dam Roller and Tainter Gates: Deterioration of gate structures is occurring with possible failure and inability to regulate pool for navigation and ecosystem management.
- Lock and Dam Concrete: Concrete supports and protects lock and dam operating machinery and gates. Concrete is deteriorating exponentially. Concrete failures are now more frequent creating a greater probability of damage to miter gates by transiting tows. Increasing potential for inability to manage pools for navigation and ecosystem sustainability.
Status
Operations and Maintenance and Major Rehabilitation Programs are unable to adequately fund maintenance activities to ensure the navigation system operates at an acceptable level of performance. The Mississippi Valley Division created a Product Delivery Team in early 2006 to address this problem regionally for the entire Mississippi River and Illinois Waterway Locks and Dams systems. Prior to creating the regional Project Delivery Team (PDT), the amount of maintenance being deferred was increasing for some locks and dams in some districts while other districts were awarding contract improvements annually. The regional approach improved this inequity. The PDT meets regularly, at least quarterly or more often as necessary.
Rock Island District is focused and committed to component replacement, which provides site and system reliability. The District’s Backlog of Maintenance for navigation on both waterways is valued at over $1.5 billion (FY24 value). Some of the highest-ranking Rock Island District maintenance projects include the following:
- Mississippi River (L/D 19) and Illinois Waterway (Marseilles, Starved Rock) Major Rehabilitation / Major Maintenance
- Systemic Dam (Tainter) Gate Replacement at Multiple L/D Sites on the Mississippi River and the Illinois Waterway
- Systemic Lock and Dam Concrete/Steel Repairs at Multiple L/D Sites on the Mississippi River and the Illinois Waterway
Additional Information
Authority
OM - Operations and Maintenance
River and Harbor Act of 1930
Major Work Item Current Year
FY 2024: Resources will be used to operate and maintain existing Lock and Dam infrastructure as well as focus on critical backlog of maintenance items, some of which are listed below:
- Dam 22 Tainter Gate Replacement Stage 1 (ongoing)
- Dam 22, 21, 20, and 18 Bulkhead Lifter Replacement
- L/D 16, 18 and 20 Traveling Kevel Replacement
- L/D 21 Concrete Replacement Phase 2
- Brandon Road Lock Upper Miter Gate Installation and Machinery Replacement
- Marseilles Electrical System Replacement
- Starved Rock and Marseilles Miter Gate Machinery Replacement
- Starved Lock Rock Concrete Repairs