Change Order Notice AML 2304 CO #2 Wee Ma Tuk Dam

The Illinois Department of Natural Resources, through the Chief Procurement Office for General Services, is posting a change order notice (AML 2304 CO #2) for contract P-94821 involving dam remediation at Wee Ma Tuk, with a 14-day notification period ending October 12, 2026. The change order is funded by the Abandoned Mined Lands Reclamation Division using federal dollars from the U.S. Department of the Interior, Office of Surface Mining.

The scope addresses damage to the Long Lake outlet structure caused by a significant precipitation event on August 14–15, 2026 that deposited approximately 11 inches of rainfall over two days. The change order requires installation of larger riprap at the Long Lake outlet structure and mandates revisions to the McCamey Lake outlet structure to incorporate larger riprap. The underlying contract covers remediation and construction services for four dams within the Lake Wee-Ma-Tuk residential subdivision located northeast of Cuba, Illinois.

The change order increases the contract cost by more than $25,000. The modification is justified on grounds that the precipitation event and resulting structural damage were not reasonably foreseeable at the time the original contract was signed.