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This study examines the effects of mining on fish populations, macroinvertebrates, and conductivity in the tributaries of East Fork Twelvepole Creek. The results show trends in fish populations, water chemistry, and the overall health of the streams.
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Effects of Mining on the Fisheries, Macroinvertebrates, and Conductivity within the tributaries of East Fork Twelvepole Creek Jonny Hart, REI Consultants, Inc. Ed J. Kirk, REI Consultants, Inc. Randy Maggard, Argus Energy-WV, LLC.
Study Framework • 4 Tributaries were first sampled in Spring and Fall 2000 for fish populations using triple pass electroshock • Benthic macro-invertebrate and water chemistry were sampled biannually each year since • April and October 2010 fish populations were re-sampled for taxa and population changes
East Lynn Lake Sampling Creeks Mining Activity Google 2010
Sampling Tributaries Big Laurel Creek Trough Fork Kiah Creek East Fork Twelvepole Creek Google 2010
Mining History • Small scale mining began in 1982 • Large scale mining began in 1987 • 50% Deep / 50% Surface • Approximately 2 million tons of coal are produced each year in this area • Impacts: Coal Prep Plant, Refuse Fill, Slurry Impoundments, Haul Roads, • Further Impacts: Logging (roughly 5,000 acres), 250 Oil/Gas Wells with pipelines
Stream Health Evaluation Methods and Comparison • SAMPLING: • Triple pass electroshock (Backpack) • COMPARISON: • 2000/2010 Fisheries Index of Biotic Integrity • 2000→2010 Bi-annual West Virginia Stream Condition Index • Macro-invertebrate Assemblage • Trend analysis- combined fall/spring scores • 2000 → 2010 Biannual Water Chemistry Sampling • Conductivity • Trend analysis- combined fall/spring values
Macroinvertebrate Assessment • West Virginia Stream Condition Index (WV-SCI) • Regulatory management/Permitting • WVDEP • Core Metrics • EPT taxa (mayfly, stonefly, caddisfly) • Total taxa • % EPT • % Chironomidae • % Top 2 Dominant taxa • HBI (Family Biotic Index)
Fisheries Assessment • Index of Biotic Integrity (IBI) (0-100 Scale) • Based on KY-IBI • Core Metrics • Native Taxa Richness • Darter, Madtom, and Sculpin Richness • Intolerant Species Richness • Simple Lithophilic Spawning Species Richness • Relative Abundance of Insectivorous Individuals • Relative Abundance of Tolerant Individuals • Relative Abundance of Facultative Headwater Individuals • Drainages < 6 square miles
East Fork Twelvepole Creek Sampling Locations Google 2010
East Fork Twelvepole Creek WV-Stream Condition Score (Bugs) Index of Biotic Integrity (Fish) Good
Kiah Creek Sampling Locations Google 2010
Kiah Creek TAXA
Kiah Creek WV-Stream Condition Score (Bugs) Index of Biotic Integrity (Fish) Grey zone
Trough Fork Sampling Locations Google 2010
Trough Fork TAXA
Trough Fork WV-Stream Condition Score (Bugs) Index of Biotic Integrity (Fish)
Big Laurel Creek Sampling Locations Google 2010
Big Laurel Creek WV-Stream Condition Score (Bugs) Index of Biotic Integrity (Fish)
Summary • Kiah Creek: • Improving WVSCI scores, though marginal overall • Fisheries Taxa loss and conductivity concerns • East Fork Twelvepole Creek: • Improving WVSCI scores, marginally unimpaired • Fish populations remaining stable, fair IBI score • Trough Fork: • Good WVSCI scores despite conductivity levels • Fish IBI rated as fair but has taxa loss concerns • Big Laurel Creek: • Good WVSCI scores, and improving • Improving IBI scores
Conclusions • 3 of the 4 Tributaries have improving WVSCI trends • 3 of the 4 Tributaries have good WVSCI standing • Overall fish trophic guilds were rated as ‘Fair’ • Conductivity levels are varying across Index values