OMINECA MINING ASSOCIATION
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Environmental Publications

​Effects of sediment on fish and their habitat 

255660pacific_region_habitat_status_report_200001_e.pdf
File Size: 153 kb
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Fisheries and Oceans - Pacific Region - 2000/01 E - Placer Mining in the Yukon Territory

"Following their review EIFAC (1964) deduced the following criteria for the protection of fisheries resources: <25 parts per million* (ppm) of suspended solids - no evidence of harmful effects on fish and fisheries; 25 - 80 ppm - it should be possible to maintain good to moderate fisheries, however the yield would be somewhat diminished relative to waters with <25 ppm suspended solids; 80 - 400 ppm - these waters are unlikely to support good freshwater fisheries; and 400 ppm suspended solids - at best, only poor fisheries are likely to be found."

​The levels of risk and the corresponding concentrations of sediment follow:
Sediment increase (mg·L-1)            Risk to fish and their habitat
    0                                                   No risk
<25                                                   Very low risk 
25 - 100                                            Low risk
100 - 200                                          Moderate risk
200 - 400                                          High risk       
>400                                                 Unacceptable risk

​Impact of suction dredging on water quality, benthic habitat, and biota in the Fortymile River and Resurrection Creek, Alaska 

epa_dredge_study.pdf
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US Environmental Protection Agency Region 10 Seattle, Washington - Prepared By: Todd V. Royer, Aaron M. Prussian, and G. Wayne Minshall Department of Biological Sciences Idaho State University - Final Report April 1999

 "The second component of this project was to examine the effects of recreational suction dredging on smaller streams in Alaska.  In 1997, sampling was conducted on a single site on Resurrection Creek, a designated recreational mining stream on the Kenai Peninsula.  In 1998, sampling was conducted on Resurrection Creek, as well as on two additional streams known to be popular for recreational dredging. The Chatanika River was sampled at a location north of Fairbanks, and Cooper Creek was sampled near its confluence with the Kenai River.  The results from Resurrection Creek indicated that there was no difference in the macroinvertebrate community between the mining area and the locations downstream of the mining area, in terms of macroinvertebrate density, taxa richness, and EPT richness.  In general, our results are in agreement with other studies that have found only localized reductions in macroinvertebrate abundance in relation to recreational suction mining." 

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  • Home
  • About
  • Golden Shovel
  • Free Miners
  • News
  • Membership
    • Become a Member
    • Membership Benefits
  • Corporate Members
  • Directors
  • Information
    • Constitution and Acts
    • Ministry of Mines
    • Environmental Publications
    • Research Resources
  • History
    • Rocher De Boule
    • Hudson Bay Mountain
  • Claims/Equipment For Sale
  • Social Media
    • Face Book Group Page
    • Facebook OMA page
    • Twitter