Non-Compliance
TRI Reporter
Clean Air Act
Clean Water Act
RCRA
TWIN CREEKS MINE
Quick Summary
- •Released 143,301,310 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
35 MI NE OF GOLCONDA, N OF MIDAS SR 789
GOLCONDA, NV 89414
View on map ↗ - County
- HUMBOLDT County
- Industry
- Mining, Quarrying, and Oil and Gas Extraction
- NAICS (North American Industry Classification)
- 212221
- Inspections
- 11 · last Sep 4, 2024
- Total Penalties
- $0
- Registry ID
- 110000601028
How This Compares
#1
of 144 TRI reporters in NV
#3
of 555 TRI reporters in Mining, Quarrying, and Oil and Gas Extraction
Ranked by most recent year's total TRI releases.
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
0
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
3
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
12
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2018)
-43% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 175,495,425 | — |
| 2016 | 182,016,240 | +4% |
| 2017 | 143,301,310 | -21% |
| 2018 | 99,442,773 | -31% |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc (fume or dust) | — | — | — | — | — | |
| Arsenic compounds | 81,026,093 | 571 | 47 | 81,025,475 | — | ♦ Carcinogen |
| Antimony compounds | 4,284,402 | 19 | 178 | 4,284,205 | — | |
| Lead compounds | 4,208,823 | 428 | — | 4,208,395 | 1,327 | |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 2,311,381 | — | — | 2,311,381 | 4 | |
| Manganese compounds | 1,871,433 | 46 | 1,234 | 1,870,153 | 19,114 | |
| Zinc compounds | 1,585,026 | 59 | — | 1,584,967 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,310,263 | 58 | — | 1,310,205 | 5,352 | |
| Thallium compounds | 710,804 | — | — | 710,804 | — | |
| Mercury compounds | 593,933 | 170 | 1 | 593,763 | — | |
| Copper compounds | 474,588 | 250 | — | 474,338 | — | |
| Vanadium compounds | 463,559 | 2 | — | 463,557 | — | |
| Nickel compounds | 291,080 | 156 | — | 290,924 | — | ♦ Carcinogen |
| Ammonia | 118,876 | 40,967 | — | 77,909 | — | |
| Cobalt compounds | 109,496 | 1 | — | 109,495 | — | ♦ Carcinogen |
| Selenium compounds | 29,360 | 1 | — | 29,359 | — | |
| Silver compounds | 23,846 | — | — | 23,846 | — | |
| Cyanide compounds | 17,187 | 16,317 | — | 870 | — | |
| Hydrogen sulfide | 12,455 | 12,455 | — | — | — | |
| Nitric acid | 168 | 168 | — | — | — |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc (fume or dust) | — | — | — | — | — | |
| Arsenic compounds | 127,802,565 | 1,957 | 38 | 127,800,570 | — | ♦ Carcinogen |
| Manganese compounds | 3,599,503 | 42 | 987 | 3,598,474 | 28,182 | |
| Antimony compounds | 3,557,895 | 22 | 117 | 3,557,756 | — | |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 2,228,869 | — | — | 2,228,869 | 5 | |
| Lead compounds | 1,789,759 | 86 | — | 1,789,673 | 2,452 | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,113,567 | 51 | — | 1,113,516 | 11,712 | |
| Zinc compounds | 1,086,610 | 36 | — | 1,086,574 | — | |
| Mercury compounds | 659,992 | 138 | 1 | 659,854 | — | |
| Thallium compounds | 323,855 | — | — | 323,855 | — | |
| Nickel compounds | 318,779 | 226 | — | 318,553 | 14,468 | ♦ Carcinogen |
| Copper compounds | 287,988 | 236 | — | 287,752 | — | |
| Vanadium compounds | 205,333 | 2 | — | 205,331 | — | |
| Cobalt compounds | 125,004 | 1 | — | 125,003 | — | ♦ Carcinogen |
| Ammonia | 107,983 | 34,216 | — | 73,767 | — | |
| Cyanide compounds | 35,784 | 17,342 | — | 18,442 | — | |
| Cadmium compounds | 35,232 | 11 | — | 35,221 | — | ♦ Carcinogen |
| Selenium compounds | 13,874 | — | — | 13,874 | — | |
| Hydrogen sulfide | 8,550 | 8,550 | — | — | — | |
| Nitric acid | 168 | 168 | — | — | — |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Arsenic compounds | 162,192,894 | 1,489 | 28 | 162,191,377 | 6 | ♦ Carcinogen |
| Antimony compounds | 8,943,541 | 28 | 72 | 8,943,441 | — | |
| Manganese compounds | 2,957,539 | 33 | 730 | 2,956,776 | 37,012 | |
| Zinc compounds | 1,962,454 | 38 | — | 1,962,416 | — | |
| Lead compounds | 1,529,372 | 59 | — | 1,529,313 | 2,038 | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,384,194 | 41 | — | 1,384,153 | 9,757 | |
| Mercury compounds | 1,035,440 | 133 | 0 | 1,035,306 | 4,764 | |
| Copper compounds | 473,449 | 203 | — | 473,246 | — | |
| Nickel compounds | 417,452 | 122 | — | 417,330 | — | ♦ Carcinogen |
| Thallium compounds | 370,712 | — | — | 370,712 | — | |
| Vanadium compounds | 217,954 | 2 | — | 217,952 | — | |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 159,534 | — | — | 159,534 | 3 | |
| Cobalt compounds | 135,785 | — | — | 135,785 | — | ♦ Carcinogen |
| Ammonia | 74,503 | 35,892 | — | 38,611 | — | |
| Selenium compounds | 53,048 | 66 | — | 52,982 | — | |
| Cadmium compounds | 52,462 | 9 | — | 52,453 | — | ♦ Carcinogen |
| Silver compounds | 28,512 | 1 | — | 28,511 | — | |
| Cyanide compounds | 17,285 | 17,285 | — | — | — | |
| Hydrogen sulfide | 8,499 | 8,499 | — | — | — | |
| Xylene (mixed isomers) | 891 | 891 | — | — | — | |
| Nitric acid | 400 | 400 | — | — | — | |
| 1,2,4-Trimethylbenzene | 320 | 320 | — | — | — |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Arsenic compounds | 150,483,587 | 3,900 | 28 | 150,479,659 | 2,974 | ♦ Carcinogen |
| Antimony compounds | 11,323,302 | 26 | 87 | 11,323,189 | — | |
| Manganese compounds | 3,104,524 | 39 | 724 | 3,103,761 | 35,339 | |
| Lead compounds | 3,024,979 | 179 | — | 3,024,800 | 1,540 | |
| Zinc compounds | 2,711,583 | 63,883 | — | 2,647,700 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,687,612 | 52 | — | 1,687,560 | 3,821 | |
| Mercury compounds | 1,142,824 | 149 | 0 | 1,142,675 | 11,675 | |
| Copper compounds | 460,231 | 274 | — | 459,957 | — | |
| Nickel compounds | 448,361 | 165 | — | 448,196 | 4,717 | ♦ Carcinogen |
| Vanadium compounds | 375,402 | 2 | — | 375,400 | — | |
| Thallium compounds | 242,752 | 1 | — | 242,751 | — | |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 166,112 | — | — | 166,112 | 2 | |
| Cobalt compounds | 145,531 | 1 | — | 145,530 | — | ♦ Carcinogen |
| Cadmium compounds | 46,633 | 12 | — | 46,621 | — | ♦ Carcinogen |
| Ammonia | 45,061 | 40,506 | — | 4,555 | — | |
| Selenium compounds | 40,861 | 66 | — | 40,795 | — | |
| Silver compounds | 22,001 | 1 | — | 22,000 | — | |
| Cyanide compounds | 13,727 | 13,727 | — | — | — | |
| Hydrogen sulfide | 8,444 | 8,444 | — | — | — | |
| n-Hexane | 1,087 | 1,087 | — | — | 12 | |
| 1,2,4-Trimethylbenzene | 411 | 411 | — | — | — | |
| Nitric acid | 400 | 400 | — | — | — |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|---|---|---|---|
| Lead compounds | — | 1,310 | — | — |
| Nitric acid | — | — | — | 1,478,994 |
| Antimony compounds | — | 207 | — | — |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | — | 478,096 | — | — |
| Arsenic compounds | — | 8,597 | — | — |
| Nickel compounds | — | 6,738 | — | — |
| Ammonia | — | 44,441 | — | — |
| Cyanide compounds | — | 8,592 | — | 1,033,966 |
| Thallium compounds | — | 29 | — | — |
| Silver compounds | — | 91 | — | — |
| Vanadium compounds | — | 3 | — | — |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | — | 5,398 | — | — |
| Copper compounds | — | 22,636 | — | — |
| Mercury compounds | — | 158 | — | — |
| Cobalt compounds | — | 1 | — | — |
| Selenium compounds | — | 419 | — | — |
| Manganese compounds | — | 45,242 | — | — |
| Hydrogen sulfide | — | — | — | 1,350,208 |
| Zinc compounds | — | 716 | — | — |
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
U.S. ECOLOGY IDAHO INC.
GRANDVIEW, ID
|
Arsenic compounds | — | — | — | — |
|
MILL DIRECT
RENO, NV
|
Lead compounds | — | 2,411 | — | — |
|
U.S. ECOLOGY IDAHO INC.
GRANDVIEW, ID
|
Lead compounds | 41 | — | — | — |
|
MILL DIRECT
RENO, NV
|
Manganese compounds | — | 15,157 | — | — |
|
BROCK BIT
GRAND JUNCTION, CO
|
Manganese compounds | — | 78 | — | — |
|
PACIFIC STEEL
ELKO, NV
|
Manganese compounds | — | 12,947 | — | — |
|
MILL DIRECT
RENO, NV
|
Nickel compounds | — | 14,468 | — | — |
|
DESERT DISPOSAL
WINNEMUCCA, NV
|
Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 5 | — | — | — |
|
U.S. ECOLOGY IDAHO INC.
GRANDVIEW, ID
|
Selenium compounds | — | — | — | — |
|
U.S. ECOLOGY IDAHO INC.
GRANDVIEW, ID
|
Chromium compounds (except for chromite ore mined in the Transvaal Region) | — | — | — | — |
|
MILL DIRECT
RENO, NV
|
Chromium compounds (except for chromite ore mined in the Transvaal Region) | — | 11,712 | — | — |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| rcra | ID and Listing of HW: General | Jun 16, 2021 | — | Open |
| rcra | Standards Applicable to Generators of HW: General | Jun 16, 2021 | — | Open |
| rcra | Standards Applicable to Generators of HW: Preparedness. Prevention, and Emergency Procedures for LQGs | Jun 16, 2021 | — | Open |
| rcra | Land Disposal Restrictions: General | Jun 16, 2021 | — | Open |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Jun 16, 2021 | — | Open |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | May 19, 2015 | Oct 22, 2015 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Contingency Plan and Emergency Procedures | Apr 24, 2013 | May 9, 2013 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Apr 24, 2013 | May 9, 2013 | Resolved |
| rcra | Land Disposal Restrictions: Treatment Standards | Oct 9, 2012 | Oct 25, 2012 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Mar 29, 2012 | May 3, 2012 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Contingency Plan and Emergency Procedures | Mar 29, 2012 | May 3, 2012 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers | Dec 15, 2009 | Dec 15, 2009 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Sep 11, 2008 | Sep 11, 2008 | Resolved |
| rcra | Interim Status Standards for Owners and Operators of HW TSDs: Contingency Plan and Emergency Procedures | Sep 28, 2006 | Nov 6, 2006 | Resolved |
| rcra | ID and Listing of HW: General | Sep 12, 2005 | Sep 5, 2006 | Resolved |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Sep 12, 2005 | Sep 5, 2006 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Aug 24, 1999 | Oct 6, 1999 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Solids, total suspended | DMR, Limited - Numeric Violation | 25.00 mg/L | 20.00 | +25% | Sep 2023 | Open |
| Iron, total [as Fe] | DMR, Limited - Numeric Violation | 2.90 mg/L | 1.00 | +190% | Mar 2023 | Open |
| Iron, total [as Fe] | DMR, Limited - Numeric Violation | 121.22 kg/d | 75.36 | +61% | Mar 2023 | Open |
| Flow rate | DMR, Limited - Numeric Violation | 21.22 MGD | 19.87 | +7% | Jul 2020 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
VERBAL INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-NVD982408668-001 · Mar 30, 2022
INSPECTION REPORT WRITTEN
RCRA (Hazardous Waste)
· Case RCRA-NVD982408668-005 · Sep 24, 2002
INSPECTION REPORT WRITTEN
RCRA (Hazardous Waste)
· Case RCRA-NVD982408668-002 · Oct 5, 1999
Other facilities in HUMBOLDT County, NV
WINNEMUCCA BOYS & GIRLS CLUB
WINNEMUCCA, NV
VALMY STATION MOBILE HOME PARK
VALMY, NV
CARWIL LLC
WINNEMUCCA, NV
NDOT QUINN RIVER - WATER SYTEM IMPROVEMENTS
HUMBOLDT COUNTY, NV
UPRR ELKO SUBDIVISION PHASE 1
WINNEMUCCA, NV
WINNEMUCCA URBAN POND
WINNEMUCCA, NV