# Weeping Water Mine

- **MSHA mine ID:** 2500998
- **Status:** Active
- **Type / commodity:** Underground / Crushed, Broken Limestone NEC
- **Location:** Cass, NE
- **Operator:** Martin Marietta Materials Inc
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 11,659
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials Inc (L16197) → Weeping Water Mine (2500998)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Martin Marietta Materials Inc → Martin Marietta Aggregates:** 1981-06-01 through 2005-05-18; derived from co-tenure at mine 2500998; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials Inc:** 2005-05-19 through current/open; derived from co-tenure at mine 2500998; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 20 since 2021:** Accidents and injuries 76 historical accident/injury rows; 1 coded fatalities and 1,355 lost days across the published record.
2. **COMPLIANCE — 166 since 2021:** Violations and penalties 869 violation rows across the full record; 194 carry an S&S flag and $560,564 appears in current assessed amounts.
3. **HEALTH — 341 samples:** Occupational health samples 316 personal; 25 area. 38 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 58K employee hours and 95 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 283 linked rows:** Contests, conferences and decisions 108 contested-violation rows, 118 civil-penalty docket/decision rows, and 57 conference records linked by issuance number.
6. **CONTRACTORS — 43 linked entities:** Contractors Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
7. **INSPECTIONS — 54 since 2021:** Inspections 266 inspection events and 10K published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 57.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12008
- **30 CFR 57.5001 — Exposure limits for airborne contaminants.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-D/section-57.5001
- **30 CFR 57.4130 — Surface electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4130
- **30 CFR 57.20020 — Unattended mine openings.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20020
- **30 CFR 57.4761 — Underground shops.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4761
- **30 CFR 57.14201 — Conveyor start-up warnings.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14201
- **30 CFR 57.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14107
- **30 CFR 57.14110 — Flying or falling materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14110

## Source coverage

- **Accident, Injuries, and Illnesses:** 76 rows; 2000-05-22 through 2026-07-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1984-03-12 through 1984-03-12; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 25 rows; 2009-09-02 through 2026-05-27; source ID `msha-area-samples`
- **Assessed Violations:** 851 rows; 2000-02-08 through 2026-07-16; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 118 rows; 2001-08-01 through 2022-01-20; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 57 rows; 2001-01-02 through 2024-11-05; source ID `msha-conferences`
- **Contested Violations:** 108 rows; 2010-08-31 through 2021-06-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 6,891 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1,546 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1981-06-01 through 2005-05-19; source ID `msha-controller-operator-history`
- **Inspections:** 266 rows; 2000-02-07 through 2026-07-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 424 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 108 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 316 rows; 2000-12-07 through 2026-07-21; source ID `msha-personal-health-samples`
- **Violations:** 869 rows; 2000-02-08 through 2026-07-16; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/weeping-water-mine-2500998`
- JSON: `/api/v1/mines/weeping-water-mine-2500998`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2500998/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2500998/relationships`
- MCP resource: `mine://2500998/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`