Recommendation 3: Annually update and prioritize stream restoration and/or channel stabilization projects identified in each management plan and support efforts to obtain funding to design and implement them.
Action Item 3.1 Develop a list of candidate stream corridor projects (includes reach scale restoration, hydraulic constriction mitigation, water quality improvement projects; does not include site scale bank stabilization) through review of existing Stream Management Plans, current stream assessments, recommendations from Highway departments and municipalities.
- a. Lead Agency: UC SWCD
- b. Other Partners: DEP, NRCS
- c. Existing Activities:
- i. Stream management plans and stream assessments for Esopus Creek, Stony Clove Creek, Broadstreet Hollow Creek, and Woodland Valley Creek.
- d. Possible Activities to Address Action Item:
- i. Review of available planning and assessment documentation
- ii. Solicitation for candidate sites from municipalities
- iii. Compilation and review of candidate sites with Flooding and Erosion working group.
- e. Planned Activities/Outcomes(s) for 2009 – 2011 Ashokan Action Plan:
- i. All possible activities listed above.
Action Item 3.2 Work on assessment, and if project is determined to be feasible, design and construction of prioritized candidate stream corridor project. If a feasible project is not identified then an additional site from the candidate list developed in Action Item 1 above will be investigated. The first priority project is an investigation into treatment alternatives for the “Chichester” reach of Stony Clove Creek (Management Units 17 and 18 in the Stony Clove SMP). This is a reach of Stony Clove Creek between Silver Hollow bridge and the Route 214 bridge in Chichester. This reach is a chronic source of turbidity in Stony Clove Creek from stream bank erosion and adjacent hill slope failure.
- a. Lead Agency: UC SWCD
- b. Other Partners: DEP, NRCS
- c. Existing Activities:
- i. Assessment in support of the Stony Clove Stream Management Plan evaluated this site and identified it as a priority treatment site.
- ii. DEP has photo-documented this site with aerial and ground reconnaissance since 2008
- d. Possible Activities to Address Action Item:
- i. Detailed stream geomorphic surveys (topographic and sediment sampling) to assess stream channel geomorphic condition and parameters
- ii. Geotechnical and hydrogeologic investigation of hillslope failure that is key contributor to suspended sediment loading.
- iii. Investigation into engineering alternatives to treat channel and hillslope instabilities
- iv. If treatment is feasible, conceptual and final design of preferred treatment alternative
- v. Construction of engineering solution to treat channel and hillslope instability.
- e. Planned Activity/Outcome(s) for 2009 – 2011 Ashokan Action Plan:
- i. Assessment and Project Assessment Report
- ii. Engineering design and Project Conceptual Design Report
- iii. Project Final Design
- iv. Constructed Project with Report