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Lower Tolay/Tubbs Marsh Enhancement

Project Description: 

Areas within the Lower Tubbs Island and Lower Tolay Creek marshlands experience decreased tidal circulation and extended ponding that results in reduced vigor of marsh vegetation, reduced habitat functions for sensitive marsh species, and mosquito production problems. 

The goal of this project is to reduce mosquito production and improve habitat conditions for target tidal marsh-dependent species by improving tidal circulation within these problem areas.  

Description of Services Provided:  

WWR is responsible for developing an Enhancement Plan to remove or breach through drainage barriers such as internal levees and to excavate new, and channels to improve tidal connectivity. 

WWR is also responsible for developing a Monitoring Plan aimed at evaluation the outcome of the enhancement effort.  

This project involves focused topographic data collection, identification of problem areas, defining needs for hydrologic modification, channel breach and culvert sizing, calculation of excavation volumes, feasibility review, and developing a regulatory approval compliance strategy. 

Additional Info

  • Project Duration: 2008 - 2011
  • Client: Audubon California Dept. of Water Resources

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