# Kerford Limestone Company

- **MSHA mine ID:** 2501126
- **Status:** Active
- **Type / commodity:** Underground / Crushed, Broken Limestone NEC
- **Location:** Cass, NE
- **Operator:** Kerford Limestone Company
- **Controller:** Constructors Inc (NE)
- **Public source rows linked:** 4,991
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Constructors Inc (NE) (M00053) → Kerford Limestone Company (L05943) → Kerford Limestone Company (2501126)**

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

## Controller and operator valid-time history

- **Constructors Inc (NE) → Kerford Limestone Company:** 1991-02-01 through current/open; derived from co-tenure at mine 2501126; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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 — 15 since 2021:** Accidents and injuries 65 historical accident/injury rows; 0 coded fatalities and 1,125 lost days across the published record.
2. **COMPLIANCE — 110 since 2021:** Violations and penalties 720 violation rows across the full record; 149 carry an S&S flag and $222,548 appears in current assessed amounts.
3. **HEALTH — 354 samples:** Occupational health samples 329 personal; 25 area. 19 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 48K employee hours and 77 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 805 linked rows:** Contests, conferences and decisions 384 contested-violation rows, 389 civil-penalty docket/decision rows, and 32 conference records linked by issuance number.
6. **CONTRACTORS — 9 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 — 35 since 2021:** Inspections 196 inspection events and 9K 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 57.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12028
- **30 CFR 57.14115 — Stationary grinding machines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14115
- **30 CFR 57.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11001
- **30 CFR 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032
- **30 CFR 57.12008 — Insulation and fittings for power wires and cables.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12008
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 57.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4102
- **30 CFR 57.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-H/section-57.9300

## Source coverage

- **Accident, Injuries, and Illnesses:** 65 rows; 2000-06-30 through 2026-02-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1991-10-01 through 1991-10-01; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 25 rows; 2009-09-09 through 2026-02-18; source ID `msha-area-samples`
- **Assessed Violations:** 706 rows; 2000-02-29 through 2026-07-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 389 rows; 2004-01-21 through 2026-09-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 32 rows; 2000-07-06 through 2026-03-25; source ID `msha-conferences`
- **Contested Violations:** 384 rows; 2007-09-18 through 2026-02-11; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,319 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 291 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 1991-02-01 through 1991-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 196 rows; 2000-02-29 through 2026-07-18; 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:** 329 rows; 2001-06-06 through 2026-05-21; source ID `msha-personal-health-samples`
- **Violations:** 720 rows; 2000-02-29 through 2026-07-20; 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/kerford-limestone-company-2501126`
- JSON: `/api/v1/mines/kerford-limestone-company-2501126`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2501126/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2501126/relationships`
- MCP resource: `mine://2501126/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`