By way of this Market Survey/Sources Sought Notice, the USACE-Chicago District intends to determine the extent of firms that are engaged in providing the services described hereunder for the Dutch Gap Aquatic Ecosystem Restoration, Antioch, Lake County, Illinois. The responses to this Notice will be used for planning purposes for an upcoming procurement. Therefore, this Notice does not constitute a Request for Proposal (RFP); it does not guarantee the future issue of a RFP; nor does it commit the government to contract for any supply or service whatsoever. Further, this Agency will not accept unsolicited proposals. Respondents are advised that this Agency will not pay for any information or administrative cost incurred in response to this Notice; all costs associated with responding to this Notice will be solely at the responding party's expense. At this time, proprietary information is not being requested, and respondents shall refrain from providing proprietary information in response to this Notice. Responses to this Notice will not be returned. Please be advised that all submissions become Government property and will not be returned. Not responding to this Notice does not preclude participation in any future RFP, if any is issued. In accordance with FAR 15.201(e), responses to this notice are not offers and cannot be accepted by the U.S Government to form a binding contract. It is the responsibility of the interested parties to monitor this site for additional information pertaining to this Notice. GOVERNMENT REQUIREMENTS: Under the proposed Contract, the contractor will be required to provide the following construction services: The Dutch Gap Aquatic Complex, IL - Sec. 206 project spans 785-acres in Antioch, Lake County, Illinois, on land owned by Lake County Forest Preserves. Intensive agriculture has led to the installation of drain tile networks, excavation of drainage ditches, and stream channelization, impacting natural hydrologic and other processes. Such impacts have enhanced flooding risks, minimized the amount of open space available for native plant and wildlife communities, diminished recreational opportunities, and disturbed natural processes and soils in the project area. The project area is further dominated by non-native and invasive plant species. The principal goal of the project is to restore stream, riparian, wetland, and buffering plant communities to provide habitat for migratory birds and local fish and wildlife. Restoration of aquatic ecosystems within the project area will reestablish hydroperiods and other hydrologic and hydraulic parameters to rehydrate former hydric soils to support critical wetland and riparian habitats. It will also reestablish native plant communities that will further diversify over time, resulting in greater quantity (acres) and quality of native plant communities. Estimated Performance Period: 5 years under NAICS 237990 Other Heavy and Civil Engineering Construction Estimated Cost: Between $…