DESCRIPTION
Advancement of the habitat restoration design will build on the existing 30% design and feasibility-level work. The focus of this habitat design effort will be to confirm, refine, and integrate the proposed habitat design with updated hydrodynamic conditions, infrastructure constraints, and constructability considerations. Goals include the following:
Bathymetric data collection and integration: New bathymetric data are needed to reflect current site conditions and support accurate hydraulic modeling, sediment transport analysis, and grading design.
Updated hydrodynamic and sediment transport modeling: Modeling of the 30% design will inform refinement of the design by providing results on flooding, timing, and location of sediment transport, and scour potential near infrastructure. Either the previous model or an updated model could be used, depending on the age of original software used. Because new bathymetric data would need to be integrated into the model, creating a new model would not be substantially more time-consuming than using the previous model. Habitat design refinement: Using the results of the updated numerical modeling and data collection, the habitat design can be refined to adjust the grading approach and identify appropriate locations for large wood placement as needed.
The deliverable of this project is a Final Design package for the Chambers Bay Estuary habitat restoration design plans. The Final Design will advance the restoration concept to a construction-ready level and provide the engineering, environmental, and technical documentation necessary to support future implementation. Advancement of the habitat restoration design will build on the existing 30% design and feasibility-level work. The focus of this habitat design effort will be to confirm, refine, and integrate the proposed habitat design with updated hydrodynamic conditions, infrastructure constraints, and constructability considerations. Goals include the following: Bathymetric data collection and integration: New bathymetric data are needed to reflect current site conditions and support accurate hydraulic modeling, sediment transport analysis, and grading design. Updated hydrodynamic and sediment transport modeling: Modeling of the 30% design will inform refinement of the design by providing results on flooding, timing, and location of sediment transport, and scour potential near infrastructure. Either the previous model using Delft-3D modeling or an updated model using equivalent software will be used to accomplish this modeling task. Habitat design refinement: Using the results of the updated numerical modeling and data collection, the habitat design can be refined to adjust the grading approach and identify appropriate locations for large wood placement.
