The following recommendations are a compilation and adaption of recommendations from the three existing SMPs in the Ashokan watershed, recent stream assessments, and input from the Flooding and Erosion working group. Flooding and Erosion Recommendations, Last Updated 5-09
Flood Protection, Response and Mitigation
Recommendation 4: Watershed municipalities should facilitate development of a flood damage reporting system to track types of flooding, their location and the costs associated with flood damage.
Action Item 4.1 Research use of flood damage tracking systems elsewhere, and if deemed useful, work with watershed municipalities to develop such systems.
Recommendation 5: Support the completion of Flood Studies by FEMA to produce necessary revisions to the existing Flood Insurance Rate Maps (FIRMs) and support adoption of the maps and training for local floodplain managers.
Action Item 5.1 Update topographic data necessary to improve accuracy of terrain for hydraulic modeling required to delineate floodplains.
Action Item 5.2 Revise FIRMs for Ashokan Reservoir watershed via an Agreement between DEP and FEMA.
Action Item 5.3 Provide training for local floodplain managers in use of revised maps
Recommendation 6: Watershed municipalities should facilitate periodic notification to landowners who have stream erosion hazard areas (SEHA) located on their property.
Action Item 6.1 Continue effort started in Upper Esopus Creek Management Plan to delineate stream erosion hazard areas. Continue to pilot this effort on Esopus Creek to determine its feasibility as a planning tool.
Recommendation 7: Support development of preliminary recommendations for an emergency early flood warning system, and assist interested communities in obtaining funding for system implementation.
Action Item 7.1 Work with watershed municipalities on an education and outreach effort to better utilize the NY Alert system for flood emergency preparedness.
Recommendation 8: Increase access to flood prevention/protection information in the watershed.
Action Item 8.1 The Ashokan Watershed SMP Field Office in Shandaken will be a host site for flood prevention/protection information.
Action Item 8.2 Develop a flood emergency preparedness program for stream management stakeholders. Watershed municipalities, working with local and state agencies, should support periodic training sessions on flood related issues. Audience should include municipal leaders, code enforcement staff, planning boards, landowners, realtors, lending institutions and others
Recommendation 9: During periods of post -flood response, municipalities need information and technical support to minimize impacts on stream system stability. Documented guidelines for “repairs” of flood damaged streams and drainage systems with best management practices advocated by the AWSMP would greatly reduce risk of further instability. Guidelines, which integrate stream form and function, should be developed for use during post flood response.
Action Item 9.1 CCE, UC SWCD, and DEP will work with WOH watershed stream management partners to develop documentation of guidelines for post-flood response to stream channel and corridor. This Action Item is contingent upon coordination with WOH watershed Stream Management Program partners, and local, state and federal agencies.
Recommendation 10: Where existing communities, structures and facilities are in at-risk locations, encourage the application of flood-proofing measures or relocation.
Action Item 10.1 Work with the Town of Shandaken to apply flood-proofing measures in the hamlet of Phoenicia as a pilot during the five year project
Recommendation 11: Municipalities in the Watershed should conduct a review of current floodplain ordinances and adopt revisions as appropriate. Prevent inappropriate development in areas of high flood or erosion risk and foster uses that are compatible with the anticipated flooding and erosion conditions. Revisions should reflect current building trends, new technologies compliance and integrate broader community plans as appropriate.
Action Item 11.1 Using results of revised FIRMs and the Stream Erosion Hazard Area assessment, work with municipalities to identify how existing ordinances can be improved to limit damaging land use in the floodplain.
Recommendation 12: Support implementation of Ulster County’s Hazard Mitigation Plan in the Town of Shandaken, with emphasis on addressing flooding and stream erosion hazards, and encourage towns in the watershed without Hazard Mitigation Plans to develop plans.
Action Item 12.1 Ulster County has a FEMA-approved Hazard Mitigation Plan. Work with the Town of Shandaken, the only Town in watershed to support the County’s HMP effort, to be prepared for use of State mitigation funding following declared State emergencies.
Stream Erosion Mitigation
Recommendation 13: Annually monitor performance of stream corridor projects funded by the Ashokan Watershed Stream Management Program.
Action Item 13.1 Develop a stream corridor project monitoring protocol that can be adapted for specific projects.
Action Item 13.2 Implement monitoring protocol with the completion of the first project completed with funds from AWSMP contracts.
Recommendation 14: Assist local landowners, contractors and others in designing and implementing best management practices to reduce erosion
Action Item 14.1 Develop a document that describes appropriate best stream management practices to address stream bank erosion for use in the Ashokan watershed. CCE, UC SWCD, and DEP will work in conjunction with other watershed partners to develop this document. The final document will be intended to have application beyond the Ashokan watershed. This Action Item is contingent upon coordination with WOH watershed Stream Management Program partners, and local, state and federal agencies
Action Item 14.2 Provide long term access to technical assistance to landowners and municipalities for assessment of their stream-related problems. Help landowners develop effective management strategies for their property and supervise stream project implementation.
Infrastructure Protection, Maintenance and Enhancement (Includes Stormwater)
Recommendation 15: Encourage collaboration between state and local highway departments and stream management personnel to develop specifications for applying natural channel design concepts to bridge rehabilitation and replacement, streambank stabilization along roadsides and other routine maintenance activities.
Action Item 15.1 Convene periodic meetings with the Highway Superintendents for each of the Ashokan watershed municipalities, Ulster and Greene County DPW staff, and NYS DOT representatives to discuss opportunities for collaboration and technical support.
Action Item 15.2 Provide technical assistance to ensure application of fluvial geomorphic principles and fiscal support to the Town of Shandaken in the Deer Lane bridge replacement as a Program-sponsored demonstration project.
Recommendation 16: Local municipalities, Greene and Ulster County Highway Departments and NYSDOT, should place a priority on vegetation management on critical areas such as roadside ditches and steep slopes. Develop programs to provide road maintenance crews with additional resources for seeding newly cleaned ditches with native ground-cover appropriate for reclamation.
Action Item 16.1 Meet with all highway departments operating in the Ashokan watershed to identify current roadside ditch and steep slope vegetation management practices and provide support as needed to improve those practices.
Recommendation 17: Watershed municipalities should evaluate winter road abrasive procedures to address abrasive quality, application methods and spring sweeping. Winter road abrasive materials containing high silt/clay content can have a direct impact on water quality. Municipalities should be encouraged to use high quality washed sand materials. Cost share funding may be needed to provide incentive to use more highly priced materials.
Action Item 17.1 Meet with all highway departments operating in the Ashokan watershed to assess whether road abrasive material in current use has high clay/silt content and identify options to improve quality of abrasive if needed.
Recommendation 18: Watershed communities should develop and implement comprehensive stormwater management plans which will protect water quality as well as reduce impacts on stream morphology.
Action Item 18.1 Meet with Towns, CWC, and UC DOE to identify status of stormwater management planning and formulate recommendations for developing or improving, as needed.
Recommendation 19: Culvert outfalls create point sources of discharge, collected from the diffuse sources of road runoff. These outfalls can discharge significant amounts of concentrated pollutants into the stream. Identify the most critical outfalls with regard to point-source discharges and substrate stability, and which offer opportunities for mitigation.
Action Item 19.1 Town of Shandaken has mapped with GPS, the locations of all culvert outfalls. Work with the Town to identify those culvert outfalls that may contribute pollutants into the stream system and prioritize opportunities for mitigation.
Action Item 19.2 If needed, work with the other Ashokan watershed municipalities, County DPW and NYSDOT to map culvert outfalls and identify those culvert outfalls that may contribute pollutants into the stream system and prioritize opportunities for mitigation.
Recommendation 20: Support the development of operational and/or structural modifications at the Shandaken Tunnel intake chamber to reduce turbidity loading to Upper Esopus Creek as outlined in the SPDES permit and Catskill Turbidity Control Study, Phase II. (EC WQ.3)
Action Item 20.1 CCE and UC SWCD staff will attend semi-annual public informational meetings required by the Shandaken Tunnel SPDES permit to stay informed on DEP’s operations of the Tunnel.
Action Item 20.2 The Ashokan SMP Field Office in Shandaken will include hard copies of all pertinent public documents regarding the operations of the Shandaken Tunnel and proposed structural and operational modifications to help reduce turbidity discharged into Esopus Creek (e.g. Catskill Turbidity Control Studies Phases 1-3). [sub-items a. – d. not needed for this Action Item.]
Recommendation 21: Advocate an active monitoring program for large woody debris (LWD) that focuses upon (1) the identification and removal of debris that poses a flood hazard to infrastructure and a threat to human welfare and (2) identifies LWD key to ecologic health.
Action Item 21.1 Develop and distribute to watershed municipalities maps of potential hazards associated with LWD based on aerial and ground-based reconnaissance imagery.
Action Item 21.2 CCE will research how other areas have handled LWD management issues.
Recommendation 22: Support an investigation of the geotechnical processes controlling coupled hill slope and stream bank erosion in order to evaluate management feasibility. These erosion sites are typically long-lasting and chronic sources of turbidity to Esopus watershed streams.
Action Item 22.1 UC SWCD and DEP intend to initiate a geomorphic and geotechnical assessment of the “Chichester reach” of Stony Clove Creek (Management Units 17 and 18 in the SCSMP) in support of a proposed treatment feasibility study. This reach of stream is characterized by chronic suspended sediment loading from coupled streambank erosion and hill slope failures.
Recommendation 23: Support implementation of a stream channel monitoring program. The intent of the monitoring would be to assess and evaluate short-term and long term stream channel system condition at representative sites. See Action Item 35.3 for the Planned Stream Assessments on page 20. This recommendation will be removed in subsequent Action Plans
Recommendation 24: Support glacial geology mapping in the Upper Esopus Watershed to improve turbidity source characterization.
Action Item 24.1 DEP intends to support the NYS Geological Survey to update/revise the mapping of the surficial geology of the Upper Esopus Creek watershed. The results of this mapping can be used to help (1) improve our understanding of where potential stream channel and hill slope sources of suspended sediment are likely to occur; and (2) aid in development of spatially distributed models of suspended sediment entrainment and transport in the stream network. This Action Item is contingent upon availability of federal funding.