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Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5. Pros : No investment Avoid complicated setting Slow rate of erosion. Cons : Does not address concerns Instability remain. Do Nothing Option. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5.

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Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

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  1. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  2. Pros: No investment Avoid complicated setting Slow rate of erosion Cons: Does not address concerns Instability remain Do Nothing Option Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  3. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  4. Pros: Slower rate of erosion Improve habitat Erosion concerns alleviated Low cost Cons: Several years before well established Poor soils on fan surface High plant mortality Conservation Easement Option Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  5. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  6. Bioengineering Option Pros: • Create habitat • Bank stabilization • Demonstration value • Compatible with easement option Cons: • Expensive • Difficult to secure on high gravelly bank • Short term protection Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  7. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  8. Channel Realignment Option Pros: • Relieve pressure on bank • Channel placed where good cover Cons: • Possible unintended consequences • Expensive • Permitting difficulties Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  9. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  10. Remove Riprap Option Pros: • Accommodates excess sediment • Improve stability downstream • Compatible with easement option Cons: • Erosion increased • Public resistance • Remote chance of extending beyond easement Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  11. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

  12. Alluvial Fan Access Option Pros: • Decrease sediment supply • Relieve pressure on VT 102 • Return to more natural condition Cons: • Further assessment needed • Limited area available • Public resistance • No short term improvements Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5

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