Mine Restoration Using Municipal BioSolids Mine Restoration Using Municipal BioSolids Vegetation – “Hello” !

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Presentation transcript:

Mine Restoration Using Municipal BioSolids

Mine Restoration Using Municipal BioSolids Vegetation – “Hello” !

Mine Restoration Using Municipal BioSolids Vegetation – “Hello” ! Or Vegetation - Hell ?????

Mine Restoration Using Municipal BioSolids Finding a way out? Or Getting in deep doo-doo?

Vegetative Community Analysis of Biosolids Test Plots After Five to Ten Years of Growth Rick Black (ENVIRON International) Richard K. Borden (Rio Tinto)

The hill that is to be the Bingham Canyon Open Pit Copper Mine - Kennecott Utah Copper THEN

2012 The Bingham Canyon Open Pit Copper Mine Kennecott Utah Copper NOW

“Development that meets the needs of the present generation, without undermining the capacity of future generations to meet their needs.”

South Salt Lake Biosolids

Inexpensive Delivered on site Dust cover Organic matter Moisture Retention High in nitrogen

Reclamation Test Plots established in 1995 and in 2000 Semi-Arid climate –Annual Precipitation = inches Elevation between 4400 and 6200 feet

Reclamation Test Plots established in 1995 and in 2000 –Tailings –Waste-rock dumps –Gravel-pit surfaces – Lime Treatment – Top Soil Treatment – Bio-Solid App.s 0,10,15,20,30 tons/ac

Methodology Test Plot Selection –Detailed documentation available on establishment date and treatment received –Plots were older than 5 years (7-10 in some cases) –Plots had not been disturbed since establishment –Location and borders of plots identifiable in the field

Methodology Vegetation Sampling –RelevÉ (“sample stand”) method - Barbour et al Absolute percent cover of each plant species - Braun-Blanquet

Methodology Vegetation Sampling –RelevÉ (“sample stand”) method - Barbour et al Absolute percent cover of each plant species - Braun-Blanquet Sociability of each plant species - Braun-Blanquet

Vegetation Sampling –RelevÉ (“sample stand”) method - Barbour et al Absolute percent cover of each plant species - Braun-Blanquet Sociability of each plant species - Braun-Blanquet Vigor of each plant species Methodology

Non-BioSolids BioSolids (20-30t/ac) Weedy# Spp.22 SpeciesCover11%88% Non- Weedy# Spp.51 SpeciesCover60%0.2% Total# Spp.73 All Spp.Cover71%88% Site Tailings (Elevation 4400 feet)

Weedy# Spp.22 SpeciesCover11%54% Non- Weedy# Spp.32 SpeciesCover64%46% Total# Spp.54 All Spp.Cover75%100% Non-BioSolids BioSolids (10-30 t/ac) Site Tailings (Elevation 4400 feet)

Weedy# Spp.34 SpeciesCover6%92% Non- Weedy# Spp.22 SpeciesCover16%0.4% Total# Spp.57 All Spp.Cover22%93% Non-BioSolids BioSolids (30 t/ac) Site Waste Rock (Elevation 6150 feet)

Weedy# Spp.76 SpeciesCover17%101% Non- Weedy# Spp.147 SpeciesCover62%7% Total# Spp.2114 All Spp.Cover79%108% Non-BioSolids BioSolids (30 t/ac) Site Waste Rock &Soil (Elevation 6150 ft)

Weedy# Spp.58 SpeciesCover8%99% Non- Weedy# Spp.148 SpeciesCover120%29% Total# Spp.1916 All Spp.Cover128% Non-BioSolids BioSolids (30 t/ac) Site Waste Rock (Elevation 6050 feet)

Weedy# Spp.67 SpeciesCover1.5%59% Non- Weedy# Spp.156 SpeciesCover33%60% Total# Spp.2113 All Spp.Cover35%119% Non-BioSolids BioSolids (0,15,20 t/ac) Site Gravel Pit–no lime (Elevation 5400 ft)

Weedy# Spp.47 SpeciesCover0.7%85% Non- Weedy# Spp.143 SpeciesCover48%25% Total# Spp.1810 All Spp.Cover49%110% Non-BioSolids BioSolids (0,15,20 t/ac) Site Gravel Pit (Elevation 5400 ft)

Comparison of Absolute Cover and Species Richness between Paired Test Plots

y=2.252x R 2 =

y = R 2 =

Comparison of Absolute Cover and Species Richness between Paired Test Plots

Questions ?