This is a presolicitation notice for the P-Optimal Wetland AE Single Award Task Order Contract (SATOC) in Defiance, OH. No proposals will be considered. this is for INFORMATIONAL purposes only to make... This is a presolicitation notice for the P-Optimal Wetland AE Single Award Task Order Contract (SATOC) in Defiance, OH. No proposals will be considered. this is for INFORMATIONAL purposes only to make industry aware of the upcoming requirement. A response is not required currently. Questions will not be answered until official solicitation is issued. The anticipated release of the synopsis, to include a request for SF-330s, is December 2025.Project Characteristics: The U.S. Army Corps of Engineers (USACE) Buffalo District (LRB), in partnership with the U.S. Army Engineer Research and Development Center (ERDC), Environmental Laboratory (EL), Wetlands and Coastal Ecology Branch (EEW), has been conducting research and development of nutrient retention strategies for over a decade, specifically focusing on phosphorus (P)-optimal wetland test bed pilot studies for the last 5 years. The Defiance, OH 10-acre location was designed and implemented in 2021 and has been in a monitoring phase for the last 4 years This contract will build upon that foundation, transitioning from initial research, implementation and monitoring to long-term performance optimization, iterative and adaptive design improvements, and broader application of P-optimal wetland technology.The overall objective of this contract is to evaluate and refine the optimization of P-optimal wetlands through continued research, demonstration, and the development and refinement of scalable implementation strategies. At the Defiance, OH location, this includes utilizing the key characteristics identified in past work to promote P absorption to address potential limitations and identify structural and functional changes to the wetland pilot, optimizing its operation and improving P retention potentials. Outcomes include maintaining baseline operations across site, continuing advanced monitoring, hosting/maintaining a live data-dashboard, and providing design, planning, refined cost estimates, and implementation for modification of the existing P-optimal wetland.SOLICITATION WEBSITE: The official solicitation and any subsequent amendments or updates, when posted, will be available free of charge by electronic posting only and may be found at Procurement Integrated Enterprise Environment (PIEE), https://piee.eb.mil/. Paper copies of the solicitation will not be issued. Telephone and Fax requests for this solicitation will not be honored. Project files are Portable Document Format (PDF) files and can be viewed, using Adobe Acrobat Reader. To download the solicitation for this project, contractors are required to register at the Procurement Integrated Enterprise Environment (PIEE) website at https://piee.eb.mil/.Solicitation Amendments, if/when issued, will be posted to the above referenced website for electronic downloading. This will be the only method of distributing the solicitation and any amendments by the Government prior to closing. It is the Offerors responsibility to monitor the website for any amendments or changes to the solicitation. REGISTRATIONS: Offerors shall have and shall maintain an active registration in the following database: System for Award Management (SAM): Offerors shall have and shall maintain an active registration in the SAM database at http://www.sam.gov to be eligible for a Government contract award. If the Offeror is a Joint Venture (JV), the JV entity shall have valid SAM registration in the SAM database representing the JV as one business/firm/entity. If at the time of award an Offeror is not actively and successfully registered in the SAM database, the Government reserves the right to award to the next prospective Offeror. No responses/questions will be addressed until solicitation is issued.