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        "lengthOfLocks":600,
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        "projectDescription":"The construction of Marseilles Lock and Dam was begun by the State of Illinois in 1920 but was completed and placed into service by the U.S. Army Corps of Engineers (USACE) in 1933 for the purpose of navigation. Marseilles Lock and Dam is located on the Illinois River at Marseilles, Illinois. The project consists of a lock chamber, a dam, two headrace dams, and an earth dike. The lock chamber is used to raise or lower river traffic between the upstream and downstream pools to navigate past the dam. The lock chamber can raise or lower river traffic a maximum of 27 feet, depending on the river conditions. The dam has an overall length of 582 feet and consists of a movable Tainter gate section 582 feet in length with 8 Tainter gates and a 30 feet long concrete ice chute ogee spillway. The north headrace dam has a length of 233.1 feet and consists of a concrete fixed dam with a length of 89.1 feet and 2 Tainter gates. The south headrace dam has a length of 138.2 feet and consists of a concrete fixed dam with a length of 70.2 feet and a single Tainter gate. The earth dike extends from the north headrace dam upstream for 3,813 feet to Gum Creek. During flood events on the Illinois River, the Tainter gates at the dam are raised out of the water to produce an open river condition.",
        "riskCharSummary":"USACE completed a risk assessment in April 2024 and classified the risk associated with Marseilles Lock and Dam as low. The assessment investigated the risks to the project from a Tainter gate trunnion anchorage failure due to a barge impact, failure or inoperability of the Tainter gates due to a barge impact, and barges in the dam result in an overtopping of the dike. Although unlikely, a dam failure would impact river navigation upstream of the dam only. An overtopping of the dike will flood the residential area behind the dike and cause substantial property damages, but depths are do not result estimated life loss.",
        "riskManagementMeasures":"USACE works to reduce the risks posed to the community by Marseilles Lock and Dam. USACE operations and engineering staff routinely conduct detailed inspections of the project to ensure the integrity of the lock and dam, identify new deficiencies, and monitor known deficiencies. The dam is well maintained through continuous operations and regular maintenance activities. The dam has a robust instrumentation and monitoring program that allows USACE staff to regularly monitor the dam\u2019s performance under changing river conditions. The dam\u2019s Emergency Action Plan is updated regularly, and the emergency notification charts are updated annually. This plan has been coordinated with state and local Emergency Management Agencies to help improve their dam incident response planning and preparedness responsibilities. Emergency exercises are routinely held with local and state emergency responders and stakeholders to enhance the local communities\u2019 emergency response plans.",
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        "yearCompleted":1933,
        "congDist":"Congressional District 16, Illinois",
        "city":"OTTAWA",
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        "ownerNames":"USACE - Rock Island District",
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