# Des Moines Portable #1

- **MSHA mine ID:** 1300150
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Madison, IA
- **Operator:** Martin Marietta Materials Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 1,732
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials Inc. (L16197) → Des Moines Portable #1 (1300150)**

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

## Controller and operator valid-time history

- **Burl R Place → P & M Stone Company Inc:** 1950-01-01 through 1980-03-05; derived from co-tenure at mine 1300150; source `msha-controller-operator-history`.
- **James W  Weaver et al → Welp & Mc Carten Inc:** 1980-03-06 through 1986-09-29; derived from co-tenure at mine 1300150; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials Inc.:** 1986-09-30 through current/open; derived from co-tenure at mine 1300150; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 — 1 since 2021:** Accidents and injuries 6 historical accident/injury rows; 0 coded fatalities and 84 lost days across the published record.
2. **COMPLIANCE — 12 since 2021:** Violations and penalties 107 violation rows across the full record; 10 carry an S&S flag and $16,796 appears in current assessed amounts.
3. **HEALTH — 40 samples:** Occupational health samples 40 personal. 1 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 10K employee hours and 19 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 9 contested-violation rows, 9 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 15 since 2021:** Inspections 62 inspection events and 969 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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.9313 — Roadway maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9313
- **30 CFR 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2000-05-08 through 2023-12-05; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-12-08 through 2011-12-08; source ID `msha-addresses`
- **Assessed Violations:** 107 rows; 2000-06-07 through 2026-06-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 9 rows; 2017-03-15 through 2019-01-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 3 rows; 2012-05-25 through 2024-11-19; source ID `msha-conferences`
- **Contested Violations:** 9 rows; 2016-07-19 through 2018-06-12; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 974 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 222 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1986-09-30; source ID `msha-controller-operator-history`
- **Inspections:** 62 rows; 2000-06-07 through 2026-07-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 158 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 30 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:** 40 rows; 2002-04-17 through 2026-02-25; source ID `msha-personal-health-samples`
- **Violations:** 107 rows; 2000-06-07 through 2026-06-17; 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/des-moines-portable-1-1300150`
- JSON: `/api/v1/mines/des-moines-portable-1-1300150`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1300150/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1300150/relationships`
- MCP resource: `mine://1300150/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`