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Mitigation Site Identification in Southeast Alaska.

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Southeast Alaska Watershed Coalition. In Lieu Fee Program Development. 2012

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Mitigation Site Identification in Southeast Alaska.

  1. 1. Potential AquaticResource Mitigation Sites for Southeast Alaska
  2. 2. Goals of Project:1. Develop a tool to support SAWC to identify, rapidly assess and map potential mitigation projects in Southeast Alaska2. Create a database to store mitigation site information and data3. Utilize tool and conduct assessments in the communities of Haines, Skagway and Juneau
  3. 3. Study Area: Southeast Alaska
  4. 4. Outcomes of Project: Compiled a list of potential mitigation projects Developed and field tested a standardized assessment form and project vignettes Generated a template of a user-friendly map on Google Earth* Completed site assessments and project reports in Skagway, Haines and Juneau Utilized GIS layers to understand potential functions of sites
  5. 5. Mitigation Site Assessment Form
  6. 6. Haines
  7. 7. 10 sites have been identified
  8. 8. Identified Restoration Projects in HainesRESTORATION LONGITUD SIZESITES LATITUDE E WETLAND TYPE (acres) HUCPORCIPINE BRIDGE R3USC, Riverine Upper Perennial UnconsolidatedPOND 59.411361 -136.002845 Shore Seasonally Flooded 8 1901030310 E2EM1P, Estuarine Intertidal Emergent Persistent7 ECHOES SITE 59.157693 -135.36176 Seasonally Flooded 1901031308SHEEP CANYON LAKE PEM1F, Palustrine Emergent PersistentSLOUGH 59.466352 -135.987244 Temporarily Flooded 1.1 19010303 PEM1R, Palustrine Emergent Persistent3-MILE FILL 59.242371 -135.494195 Seasonally Flooded-Tidal 1.8 1901030313 PSS1C, Riparian Shrub Forest Broad-leaved7-MILE SADDLE TRAIL 59.266208 -135.601389 deciduous seasonally flooded 0.07 1901030313 PSS1C, Riparian Shrub Forest Broad-leaved5-MILE DRIVEWAY 59.259444 -135.560833 deciduous seasonally flooded 0.0046 190103031310-MILE FLORESKIPROPERTY 59.2836 -135.680153 PEM1B, Palustrine Emergent Persistent Saturated 2.01 1901030313DOT CULVERT 59.236087 -135.456433 Stream 0.04 1901031308JONES POINT SITE 59.233024 -135.473507 Stream 1.3 1901031308HAINES PRIVATELANDFILL SITE 59.219707 -135.426743 Palustrine 0.45 190103031314-MILE SIDE ROADS Riverrine 19010303HAINES SAWMILL 59.285311 -135.479246 Estuarine-E1UBL 1901030317-MILE CULVERT Riverine 19010303WELLS BRIDGE 59.412364 -135.931716 GH VHNBC 1.05 19010303
  9. 9. Site Efficacy in Haines GREEN: No obstacles YELLOW: Potential obstacles RED: Major obstaclesCase Study #1 Case Study #2Porcupine 10-Mile Fill SiteBridge Fill Site “GREEN” “YELLOW”
  10. 10. {
  11. 11. Reasons this site was chosen:1. Located adjacent to an anadromous fish stream2. No major obstacles3. Owned by the Alaska State Parks4. Straight forward project goals and objectives
  12. 12. Goal of Potential Restoration Project:Improve rearing habitat for salmonids andmaintain productivity of amphibians.
  13. 13. Map of Porcupine Pond Site
  14. 14. Case Study #2: 10-Mile Fill Site10-acre Wetland area 2-acre Fill Area
  15. 15. Project Objectives: 1. To remove fill 2. To re-establish vegetation
  16. 16. Final Project Report
  17. 17. Ecological Suitability of Restoration SitesEcological Suitability: (refer to 332.2(d) Site Selection of the 2008 Final Rule) a. Hydrological conditions: The west bank of the Skagway River is predominantly gravel beds and a large dike, which is not conducive to riparian or fish habitat productivity. The river is trying to make new channels but cannot based on the location of this dike. b. Watershed scale features: Islands with vegetation increase habitat productivity. Gravel causes less productivity and has a negative impact on the diversity of riparian and fish habitat. The river has created several natural channels but the vegetation needs to be more abundant to support life. c. Size and location in relative to other hydrologic sources: This restoration site is 1500 linear feet along the Skagway River which is nearly ½ mile wide. d. Compatibility with adjacent land uses and watershed management plans: Unknown. e. Foreseeable affects this project with have on aquatic or terrestrial resources: This project would have a very positive impact on both aquatic and terrestrial resources by way of creating natural cover and restoring structural habitat. f. Other habitat relevant factors including, habitat trends, stream impact, habitat corridor for wildlife, habitat for state or federally listed threatened and endangered species, etc.; This section of the river is heavily impacted by the gravel extraction company on the west side, which has transformed the river into a gravel desert which is not amenable to wildlife habitat. g. Other human use relevant factors including, land use changes, development trends, local or regional goals for water quality and floodplain management, relative potential for chemical contamination of the aquatic resources: Gravel extraction company is creating a “desert” effect to the river, where the fish and wildlife do not thrive.
  18. 18. Google Earth Perspective
  19. 19. Skagway
  20. 20. Skagway Sites 10 sites identified
  21. 21. Case Study in Skagway:Revetment and Re-vegetation on the Skagway River “GREEN”
  22. 22. Site location on the Skagway River: Revetment and Re-vegetation Project area on Skagway River
  23. 23. Revetment and Re-vegetation on the Skagway RiverArea along dike to add soil andred alders to the bank alongrevetment area.
  24. 24. Functions to be restored:  Riparian functions  fish and wildlife habitat  organic matter input to streams  structural habitat restoration.
  25. 25. Where do we go from here? Study Areas
  26. 26. Using Google Earth as a user friendlyway for the public to view mitigation projects
  27. 27. Lessons learned: Best approach to identifying site: Communication with community groups to get local information is key. Asking the right questions:1. What is the history of the site?2. What functions need to be restored?3. What obstacles are involved with potential restoration? Be prepared when going out to site: Have map of site with coordinates, project assessment form (can be partially filled out ahead of time), get permission from property owners prior to site visit and know site features ahead of time.
  28. 28. Contact Info….. Melany Zimmerman Southeast Alaska Watershed Coalition (406) 529-5225