Coal production
49,354,405reported short tons
ACTIVE / CONTROLLER PORTFOLIO
Alliance Resource Partners LP
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA CONTROLLER IDC15455
MINE PORTFOLIO
14 of 14 mines and facilities
2025-01-01 – 2026-10-28. Active records; production reporting is not required.
Material, method and type filters apply to this table. The portfolio’s status applies to the entire page. GEM fields describe their own release, not the selected MSHA year.
| Mine | Location / type | Coal · short tons | Hours worked | Violations | Accident records | On-site inspection hours |
|---|---|---|---|---|---|---|
| CARDINAL1517216 · Active6/8 quarters reported | Hopkins, KYUnderground · MSHA: Coal (Bituminous) | 6,732,314 | 1,639,125 | 1,110 | 79 | 10,629.8 |
| Excel #51519838 · Active6/8 quarters reported | Pike, KYUnderground · MSHA: Coal (Bituminous) | 959,134 | 504,585 | 280 | 20 | 3,955.8 |
| Gibson South1202388 · Active6/8 quarters reported | Gibson, INUnderground · MSHA: Coal (Bituminous) | 8,342,126 | 1,376,266 | 183 | 39 | 4,993.5 |
| Hamilton County Coal Processing1103242 · Active6/8 quarters reported | Hamilton, ILFacility · MSHA: Coal (Bituminous) | 0 | 118,925 | 8 | 4 | 278.5 |
| Henderson County Mine1502709 · Active6/8 quarters reported | Henderson, KYUnderground · MSHA: Coal (Bituminous) | 6,109,838 | 1,079,642 | 541 | 69 | 6,154.3 |
| Mettiki General1800671 · Active6/8 quarters reported | Garrett, MDFacility · MSHA: Coal (Bituminous) | 0 | 128,024 | 9 | 5 | 119.8 |
| Mid-America Carbonates LLC1103176 · Active6/8 quarters reported | Hardin, ILFacility · MSHA: Crushed, Broken Limestone NEC | 0 | 27,740 | 2 | 0 | 14.5 |
| MINE NO. 11103203 · Active6/8 quarters reported | Hamilton, ILUnderground · MSHA: Coal (Bituminous) | 8,095,575 | 1,211,252 | 318 | 42 | 4,635.0 |
| Mountain View Mine4609028 · Active6/8 quarters reported | Tucker, WVUnderground · MSHA: Coal (Bituminous) | 1,387,915 | 538,176 | 165 | 23 | 2,034.3 |
| Preparation Plant1517733 · Active6/8 quarters reported | Pike, KYFacility · MSHA: Coal (Bituminous) | 0 | 80,736 | 28 | 1 | 400.5 |
| River View Facilities1503178 · Active6/8 quarters reported | Union, KYFacility · MSHA: Coal (Bituminous) | 0 | 269,430 | 34 | 6 | 397.8 |
| RIVER VIEW MINE1519374 · Active6/8 quarters reported | Union, KYUnderground · MSHA: Coal (Bituminous) | 8,971,268 | 1,910,316 | 560 | 74 | 8,660.0 |
| TUNNEL RIDGE MINE4608864 · Active6/8 quarters reported | Ohio, WVUnderground · MSHA: Coal (Bituminous) | 8,756,235 | 1,710,129 | 224 | 52 | 4,294.8 |
| Warrior Preparation Plant1514335 · Active6/8 quarters reported | Hopkins, KYFacility · MSHA: Coal (Bituminous) | 0 | 124,119 | 10 | 0 | 354.5 |
Production and hours sum available quarterly reports. — means unavailable; zero safety records means none in the selected imported period. Ownership reflects the current MSHA record.
LOCATION
Portfolio map
14 of 14 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- CARDINAL37.40528, -87.53528Open map ↗
- Excel #537.66111, -82.48083Open map ↗
- Gibson South38.30556, -87.70806Open map ↗
- Hamilton County Coal Processing38.17000, -88.62222Open map ↗
- Henderson County Mine37.69722, -87.72417Open map ↗
- Mettiki General39.26000, -79.42750Open map ↗
- Mid-America Carbonates LLC37.51778, -88.14861Open map ↗
- MINE NO. 138.17111, -88.60167Open map ↗
- Mountain View Mine39.18722, -79.38167Open map ↗
- Preparation Plant37.59333, -82.48639Open map ↗
- River View Facilities37.76000, -87.94722Open map ↗
- RIVER VIEW MINE37.74306, -87.88833Open map ↗
- TUNNEL RIDGE MINE40.09611, -80.58722Open map ↗
- Warrior Preparation Plant37.34361, -87.57972Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-28. All 14 mines listed under this controller were checked; 14 have reports in the available quarters. Totals use current ownership.
Hours worked
10,718,465reported employee hours
Tons per hour
4.60production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 8,456,605 | 1,903,683 | 4.44 | 3,174 | 14/14 mines reporting |
| 2025 Q2 | 8,092,011 | 1,806,353 | 4.48 | 3,084 | 14/14 mines reporting |
| 2025 Q3 | 8,462,109 | 1,815,374 | 4.66 | 3,109 | 14/14 mines reporting |
| 2025 Q4 | 8,134,225 | 1,718,106 | 4.73 | 3,082 | 14/14 mines reporting |
| 2026 Q1 | 7,983,752 | 1,759,338 | 4.54 | 3,010 | 14/14 mines reporting |
| 2026 Q2 | 8,225,703 | 1,715,611 | 4.79 | 2,935 | 14/14 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-28
Violations
3,472701 significant & substantial (S&S)
Accident records
4141 records classified as fatality
Proposed penalties · USD
1,525,222.003,211 of 3,472 violations with amounts
On-site inspection hours
46,922.751,021 inspections · 1,021 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 416 | 80 | 184,864.00 | 55 | 0 | 141 | 6,095.8 |
| 2025-Q2 | 566 | 96 | 250,886.00 | 49 | 0 | 145 | 6,729.0 |
| 2025-Q3 | 532 | 87 | 240,859.00 | 71 | 0 | 146 | 6,888.8 |
| 2025-Q4 | 430 | 113 | 223,297.00 | 53 | 1 | 126 | 6,731.8 |
| 2026-Q1 | 429 | 98 | 238,348.00 | 49 | 0 | 122 | 6,319.8 |
| 2026-Q2 | 527 | 98 | 214,411.00 | 58 | 0 | 147 | 6,863.0 |
| 2026-Q3 | 444 | 103 | 172,557.00 | 73 | 0 | 155 | 6,183.5 |
| 2026-Q4 * | 128 | 26 | — | 6 | 0 | 39 | 1,111.3 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Open activity page ↗Maintenance of incombustible content of rock dust.
CARDINAL · 151721630 CFR 75.403 · $151.00 proposed penalty
Power wires and cables; insulation and protection.
CARDINAL · 151721630 CFR 75.517 · Significant and substantial (S&S) · $1,968.00 proposed penalty
Dry chemical devices; capacity; minimum requirements.
CARDINAL · 151721630 CFR 75.1107-9(a)(1) · $151.00 proposed penalty
Permissible electric face equipment; maintenance.
CARDINAL · 151721630 CFR 75.503 · $151.00 proposed penalty
Automatic fire sensor and warning device systems; examination and test requirements.
RIVER VIEW MINE · 151937430 CFR 75.1103-8(c) · $151.00 proposed penalty
Accumulation of combustible materials.
Mountain View Mine · 460902830 CFR 75.400 · $465.00 proposed penalty
Hoisting
Mountain View Mine · 4609028Accident only
Accident narrative
Elevator was not called in due to troubleshooting. MSHA inspector said that this needed to be called in, so we did.
Non-Injury Accident Investigation
Mountain View Mine · 46090284.0 on-site hours reported
Ventilation controls.
MINE NO. 1 · 110320330 CFR 75.333(h) · $209.00 proposed penalty
Maintenance of belt conveyors and belt conveyor entries.
CARDINAL · 151721630 CFR 75.1731(b) · $151.00 proposed penalty
Protection from falls of roof, face and ribs.
CARDINAL · 151721630 CFR 75.202(a) · Significant and substantial (S&S) · $592.00 proposed penalty
Maintenance of belt conveyors and belt conveyor entries.
CARDINAL · 151721630 CFR 75.1731(b) · $151.00 proposed penalty
Protection from falls of roof, face and ribs.
CARDINAL · 151721630 CFR 75.202(a) · Significant and substantial (S&S) · $592.00 proposed penalty
Automatic fire sensor and warning device systems; installation; minimum requirements.
RIVER VIEW MINE · 151937430 CFR 75.1103-4(b) · $151.00 proposed penalty
Automatic fire sensor and warning device systems; examination and test requirements.
RIVER VIEW MINE · 151937430 CFR 75.1103-8(a) · $245.00 proposed penalty
Electric equipment; examination, testing and maintenance.
RIVER VIEW MINE · 151937430 CFR 75.512 · $959.00 proposed penalty
Immediate notification.
Mountain View Mine · 460902830 CFR 50.10(d) · $151.00 proposed penalty
Other safeguards.
Mountain View Mine · 460902830 CFR 75.1403 · $313.00 proposed penalty
Violation — cited standard not reported
Mountain View Mine · 4609028$1,252.00 proposed penalty
Other
CARDINAL · 1517216Days away from work only
Accident narrative
Employee was stepping off of a stinger ride when their knee gave out causing pain while standing.
Health Technical Investigation
Mountain View Mine · 460902834.8 on-site hours reported
Respirable dust standards.
Mountain View Mine · 460902830 CFR 70.100(a)(2) · Significant and substantial (S&S) · $1,037.00 proposed penalty
Slip or fall of person
Mettiki General · 1800671No dys awy frm wrk,no rstr act
Accident narrative
Employee was going to turn on the clean coal filter drain pump. When they walked around 74 tail piece, the employee slipped on ice on the plant floor causing them to fall. Employee was placed in a knee brace.
Machinery
TUNNEL RIDGE MINE · 4608864Days away from work only
Accident narrative
Employee was using a jackhammer to hammer at a shelf of coal at knee level. The piece of coal gave way and the hammer struck a rock and bounced into EE's foot. Injury was not the result of training or compliance issue.
Spot Inspections
MINE NO. 1 · 1103203103(i) · 6.0 on-site hours reported
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-28.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
EIA-923 · COAL RECEIPTS
Coal shipments and quality
Receipts reported by power plants and terminals, matched by MSHA mine ID.
Quarterly receipts and quality
| Quarter | Short tons | Heat · Btu/lb | Sulfur % | Ash % | Delivered USD/ton | |
|---|---|---|---|---|---|---|
| 2025-Q3 * | 2,199,554 | 11,932 | 2.82 | 9.29 | 70.15 | |
| 2025-Q4 | 6,250,003 | 11,905 | 2.96 | 9.02 | 68.79 | |
| 2026-Q1 | 5,930,231 | 11,911 | 2.79 | 8.93 | 66.60 | |
| 2026-Q2 | 6,710,516 | 11,937 | 2.75 | 8.88 | 63.61 | |
| 2026-Q3 * | 5,152,914 | 11,960 | 2.90 | 8.87 | 65.03 |
| Month / source | Mine | Receiving plant / supplier | Short tons | Delivered USD/ton | Heat · Btu/lb | Sulfur % | Ash % | Purchase | Transport |
|---|---|---|---|---|---|---|---|---|---|
| 2026-08EIA row 13378 · preliminary | HAMILTON COUNTY MINE #11103203 | Seminole (FL)136 · FL · ALLIANCE COAL | 164,454 | 71.83 | 11,795 | 2.83 | 8.20 | ContractBIT | Rail |
| 2026-08EIA row 13465 · preliminary | WHITE OAK1103203 | Bowen703 · GA · ALLIANCE COAL LLC | 44,127 | 83.27 | 11,855 | 2.89 | 8.70 | ContractBIT | Rail |
| 2026-08EIA row 13468 · preliminary | WHITE OAK1103203 | Bowen703 · GA · ALLIANCE COAL LLC | 44,332 | 83.87 | 11,954 | 2.96 | 8.10 | ContractBIT | Rail |
| 2026-08EIA row 13470 · preliminary | WHITE OAK1103203 | Bowen703 · GA · ALLIANCE COAL LLC | 72,250 | 79.33 | 12,016 | 2.91 | 7.90 | ContractBIT | Rail |
| 2026-08EIA row 13471 · preliminary | WHITE OAK1103203 | Bowen703 · GA · ALLIANCE COAL LLC | 73,913 | 84.23 | 11,988 | 2.95 | 8.30 | ContractBIT | Rail |
| 2026-08EIA row 13499 · preliminary | RIVER VIEW MINE1519374 | Clifty Creek983 · IN · ALLIANCE COAL | 112,834 | 61.72 | 11,359 | 3.03 | 9.20 | ContractBIT | River |
| 2026-08EIA row 13501 · preliminary | RIVER VIEW MINE1519374 | Clifty Creek983 · IN · ALLIANCE COAL | 42,409 | 56.65 | 11,431 | 2.98 | 9.00 | ContractBIT | River |
| 2026-08EIA row 13502 · preliminary | RIVER VIEW MINE1519374 | Clifty Creek983 · IN · ALLIANCE COAL | 36,130 | 65.73 | 11,361 | 3.03 | 9.20 | ContractBIT | River |
| 2026-08EIA row 13578 · preliminary | RIVER VIEW MINE1519374 | Ghent1356 · KY · ALLIANCE COAL | 23,067 | 55.60 | 11,362 | 3.03 | 9.10 | ContractBIT | River |
| 2026-08EIA row 13580 · preliminary | RIVER VIEW MINE1519374 | Ghent1356 · KY · FORE LLC | 5,099 | 45.23 | 11,000 | 2.75 | 9.00 | ContractBIT | River |
| 2026-08EIA row 13583 · preliminary | HAMILTON COUNTY MINE #11103203 | Ghent1356 · KY · ALLIANCE COAL | 49,337 | 59.60 | 11,760 | 2.90 | 8.70 | ContractBIT | River |
| 2026-08EIA row 13587 · preliminary | RIVER VIEW MINE1519374 | Ghent1356 · KY · ALLIANCE COAL | 21,353 | 56.52 | 11,364 | 2.95 | 9.10 | ContractBIT | River |
| 2026-08EIA row 13589 · preliminary | RIVER VIEW MINE1519374 | Ghent1356 · KY · ALLIANCE COAL | 79,579 | 56.48 | 11,360 | 3.02 | 9.20 | ContractBIT | River |
| 2026-08EIA row 13592 · preliminary | CARDINAL1517216 | Mill Creek (KY)1364 · KY · ALLIANCE COAL | 183,160 | 73.58 | 12,455 | 3.00 | 8.50 | ContractBIT | Rail |
| 2026-08EIA row 13595 · preliminary | HAMILTON COUNTY MINE #11103203 | Mill Creek (KY)1364 · KY · ALLIANCE COAL | 19,782 | 58.98 | 11,795 | 2.83 | 8.40 | ContractBIT | River |
| 2026-08EIA row 13597 · preliminary | RIVER VIEW MINE1519374 | Mill Creek (KY)1364 · KY · ALLIANCE COAL | 19,701 | 55.39 | 11,356 | 3.04 | 9.50 | ContractBIT | River |
| 2026-08EIA row 13598 · preliminary | RIVER VIEW MINE1519374 | Mill Creek (KY)1364 · KY · ALLIANCE COAL | 29,526 | 55.34 | 11,346 | 3.00 | 9.30 | ContractBIT | River |
| 2026-08EIA row 13794 · preliminary | TUNNEL RIDGE MINE4608864 | Cardinal2828 · OH · ALLIANCE COAL | 25,871 | —Not published | 12,615 | 3.00 | 8.50 | ContractBIT | River |
| 2026-08EIA row 13799 · preliminary | TUNNEL RIDGE MINE4608864 | Cardinal2828 · OH · ALLIANCE COAL | 52,391 | —Not published | 12,620 | 2.86 | 8.50 | ContractBIT | River |
| 2026-08EIA row 13803 · preliminary | RIVER VIEW MINE1519374 | Miami Fort2832 · OH · ALLIANCE COAL | 19,946 | —Not published | 11,412 | 3.04 | 9.30 | SpotBIT | River |
| 2026-08EIA row 13807 · preliminary | TUNNEL RIDGE MINE4608864 | Miami Fort2832 · OH · TUNNEL RIDGE LLC | 5,130 | —Not published | 12,630 | 3.17 | 8.50 | SpotBIT | River |
| 2026-08EIA row 13815 · preliminary | TUNNEL RIDGE MINE4608864 | Kyger Creek2876 · OH · ALLIANCE COAL | 64,624 | 58.24 | 12,595 | 2.94 | 8.70 | ContractBIT | River |
| 2026-08EIA row 13817 · preliminary | TUNNEL RIDGE MINE4608864 | Kyger Creek2876 · OH · ALLIANCE COAL | 32,379 | 62.07 | 12,585 | 3.11 | 8.60 | ContractBIT | River |
| 2026-08EIA row 13901 · preliminary | RIVER VIEW MINE1519374 | Cumberland (TN)3399 · TN · ALLIANCE COAL | 98,849 | 55.43 | 11,395 | 2.85 | 8.90 | ContractBIT | River |
| 2026-08EIA row 13902 · preliminary | HAMILTON COUNTY MINE #11103203 | Cumberland (TN)3399 · TN · ALLIANCE COAL | 46,925 | 57.43 | 11,711 | 2.79 | 8.50 | ContractBIT | River |
Delivered cost includes transport and is not mine revenue. Missing prices remain blank. * Fewer than three months are published in the selected quarter. Receipts reflect the months EIA has published; an unfinished quarter is not comparable with a full quarter. Portfolio matches use current ownership.
Coverage, sources and calculations
- Reported coal receipts at EIA-923 power plants/terminals; this is not a census of mine shipments, exports or metallurgical sales.
- Matches use only the published MSHA ID, normalized to seven digits. Unidentified mine origins remain in the source table but are not assigned to a mine.
- Portfolio attribution uses current MSHA ownership, not ownership at the shipment date. Receipts and production can differ because of timing, stocks and coverage.
- Quality means are weighted by positive reported tons with that measurement. Delivered cost uses only rows with published cost, positive heat and positive tons; missing/withheld costs are never zero-filled.
- USD/ton = (cents/MMBtu ÷ 100) × MMBtu/ton. This is plant delivered cost, not mine sales price or revenue.
- Receipt month is as published, including records supplied by annual respondents. Recent months are preliminary and subject to revision. Missing rows do not prove zero shipments.
Imported releases start 2008-01. This window includes 12 published months. EIA releases · Survey instructions
- 2026 · preliminary · EIA923_Schedules_2_3_4_5_M_08_2026_22OCT2026.xlsx · Page 5 Fuel Receipts and Costs
- 2025 · final · EIA923_Schedules_2_3_4_5_M_12_2025_Final.xlsx · Page 5 Fuel Receipts and Costs
EIA ANNUAL COAL REPORT · 2024
Coal prices and estimated revenue
Annual county prices and a production-based allocation of county coal sales.
The estimate assumes each eligible mine receives its county-average price and shares county sales in proportion to production. Actual sales and prices can differ substantially. Unavailable estimates are excluded; this is not a total for the whole portfolio. Annual price data uses a separate window from the MSHA charts.
| Mine / county | Annual production · tons | County FOB · USD/ton | Est. sales · tons | Est. coal revenue · USD | Basis / availability |
|---|---|---|---|---|---|
| Excel #51519838 · Pike, Kentucky | 921,222 | 103.84 | 901,264 | 93,587,284 | County allocation estimate44.48% of eligible county production10 eligible mines / 10 sales respondents |
| Mine No. 11103203 · Hamilton, Illinois | 4,773,185 | — | — | — | County sales or price not published1 eligible mines / 1 sales respondents |
| Hamilton County Coal Processin1103242 · Hamilton, Illinois | 0 | — | — | — | Preparation plant1 eligible mines / 1 sales respondents |
| Gibson South1202388 · Gibson, Indiana | 5,698,564 | — | — | — | County sales or price not published2 eligible mines / 2 sales respondents |
| Henderson County Mine1502709 · Union, Kentucky | 254,286 | — | — | — | County sales or price not published2 eligible mines / 2 sales respondents |
| River View Facilities1503178 · Union, Kentucky | 0 | — | — | — | Preparation plant2 eligible mines / 2 sales respondents |
| Warrior Preparation Plant1514335 · Hopkins, Kentucky | 0 | — | — | — | Preparation plant1 eligible mines / 1 sales respondents |
| Cardinal1517216 · Hopkins, Kentucky | 4,406,080 | — | — | — | County sales or price not published1 eligible mines / 1 sales respondents |
| Preparation Plant1517733 · Pike, Kentucky | 0 | 103.84 | — | — | Preparation plant10 eligible mines / 10 sales respondents |
| River View Mine1519374 · Union, Kentucky | 8,999,873 | — | — | — | County sales or price not published2 eligible mines / 2 sales respondents |
| Mettiki General1800671 · Garrett, Maryland | 0 | — | — | — | Preparation plant2 eligible mines / 2 sales respondents |
| Tunnel Ridge Mine4608864 · Ohio, West Virginia | 6,030,327 | — | — | — | County sales or price not published1 eligible mines / 1 sales respondents |
| Mountain View Mine4609028 · Tucker, West Virginia | 1,082,802 | — | — | — | County sales or price not published1 eligible mines / 1 sales respondents |
Method, assumptions and source records
- This is an annual county-sales allocation, not reported mine or company revenue. Currency is nominal USD in the source year; quantities are short tons.
- Mine share = same-year annual mine production / eligible same-county production. Estimated sales = published county sales × share. Estimated coal revenue = estimated sales × published county average FOB price.
- The model assumes eligible mines share county sales in proportion to production and receive the county-average price. Matching mine counts is a check, not proof of identical respondents. Mine quality, contracts and sales timing can differ substantially. No statistical confidence interval is implied.
- FOB excludes transport and insurance. EIA-923 delivered costs do not enter this model. No grade premium, state/national fallback, quarterly apportionment or carry-forward to a later year is applied.
- Eligibility follows the source's production threshold and excludes preparation-only and refuse operations. Withheld values, inconsistent county counts and missing/ambiguous locations produce no estimate.
- County sales are published in thousands of tons and prices to cents. Calculations retain precision, but the inputs are rounded and the allocation is approximate.
- Portfolio attribution uses current MSHA ownership, not ownership during the sales year. Covered-mine sums exclude unavailable estimates and must not be read as whole-company revenue. Coverage denominators use the annual EIA mine-production release.
Sales-reporting threshold: 50,000 short tons per mine in 2024. Withheld sales or prices stay unavailable.
EIA Table 30 · county sales and FOB prices · EIA annual mine production · Release index
Annual report released November 19, 2025. Method: county-sales-allocation-v1. JSON and CSV preserve source row numbers and file checksums.
SELECTED PORTFOLIO
10 linked operators.
Relationships reflect the selected mine status and current MSHA controller/operator fields.