Amazon Prairie Mitigation Bank - Phase 2 Project Plans

This is a project plans document for the Amazon Prairie Mitigation Bank Phase 2 project in Oregon, detailing the construction and design specifications for wetland habitat restoration and mitigation work. The project encompasses comprehensive site development including general excavation and grading operations with 3D machine grade control, shallow pool construction for habitat creation, embankment berms and spillway systems, and permanent stabilization measures. The scope includes specialized structural installations such as flashboard risers, headwall structures, and fish screen systems, along with storm pipe installation and ecological enhancements through coir and wood log placement. Critical to the project is the protection of sensitive areas, including archaeological sites, throughout all phases of construction. The plans establish technical specifications and engineering requirements necessary for contractors to execute the mitigation bank development while maintaining environmental compliance and habitat functionality standards.

The document provides detailed design specifications and construction methodologies required for the phase 2 implementation of the Amazon Prairie Mitigation Bank. These plans serve as the technical foundation for the competitive bidding process outlined in the 2026 ITB 10 solicitation and ensure that all contractors have consistent design standards and performance expectations for the excavation, grading, hydrological control, and ecological restoration elements of the project. The plans address the sensitive nature of wetland construction in areas with potential archaeological significance, establishing protective protocols and technical requirements that bidders must incorporate into their cost proposals and construction schedules.