River & Lake Restoration
  Ponca State Park | Blue River | Green River | Lake Stevens |
   Los Angeles River

Tetra Tech produced an integrated Detailed Project Report (DPR) / Environmental Assessment (EA) and conceptual through 90% plans and specifications for the Ponca State Park Habitat Restoration Project. The project is located adjacent to the Missouri National Recreational River. The project restored a series of disconnected backwater and wetland areas in newly acquired lands of Ponca State Park. Tetra Tech’s feasibility phase work included hydrographic surveys, geotechnical investigations, with- and without-project hydrologic and hydraulic analyses, geomorphic and sedimentation analyses, and presentation of design alternatives. A preferred alternative was selected based on results of the Incremental Cost Analysis (ICA), which utilizes the Habitat Evaluation Procedures (HEP) to evaluate with- and without-project conditions. Tetra Tech produced 90 percent design plans and cost estimates to accompany the design report for the preferred alternative. The project includes environmental documentation and permitting along with public and agency coordination. The project was constructed in 2004 and has been providing significant off-channel habitat for juvenile fishes of the Missouri River. The State Park is continuing native prairie revegetation adjacent to the site.