# Monahan Pit

- **MSHA mine ID:** 2501257
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Holt, NE
- **Operator:** Atkinson Sand & Gravel Inc
- **Controller:** Trista R  Schaaf
- **Public source rows linked:** 77
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Trista R  Schaaf (0148261) → Atkinson Sand & Gravel Inc (L00345) → Monahan Pit (2501257)**

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

## Controller and operator valid-time history

- **Stephen J  Schaaf → Atkinson Sand & Gravel Inc:** 2009-03-17 through 2019-04-30; derived from co-tenure at mine 2501257; source `msha-controller-operator-history`.
- **Trista R  Schaaf → Atkinson Sand & Gravel Inc:** 2019-05-01 through current/open; derived from co-tenure at mine 2501257; 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 11 violation rows across the full record; 3 carry an S&S flag and $6,608 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 0 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 22 linked rows:** Contests, conferences and decisions 12 contested-violation rows, 10 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 0 since 2021:** Inspections 7 inspection events and 92 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 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.11001 — Safe access.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14103 — Operators stations.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **30 CFR 56.15020 — Life jackets and belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15020

## Source coverage

- **Addresses of Record:** 1 rows; 2011-07-06 through 2011-07-06; source ID `msha-addresses`
- **Assessed Violations:** 9 rows; 2009-03-17 through 2010-07-27; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 10 rows; 2010-11-24 through 2012-10-16; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 12 rows; 2009-03-17 through 2010-07-27; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 2009-03-17 through 2009-03-17; source ID `msha-controller-operator-history`
- **Inspections:** 7 rows; 2009-03-17 through 2011-06-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 21 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 3 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 11 rows; 2009-03-17 through 2010-07-27; 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/monahan-pit-2501257`
- JSON: `/api/v1/mines/monahan-pit-2501257`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2501257/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2501257/relationships`
- MCP resource: `mine://2501257/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`