# GP 500

- **MSHA mine ID:** 2102999
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** St Louis, MN
- **Operator:** Northland Constructors
- **Controller:** James L  Holmgren
- **Public source rows linked:** 291
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**James L  Holmgren (M06640) → Northland Constructors (0135594) → GP 500 (2102999)**

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

## Controller and operator valid-time history

- **James L  Holmgren → Northland Crushing:** 1989-08-01 through 2014-12-04; derived from co-tenure at mine 2102999; source `msha-controller-operator-history`.
- **James L  Holmgren → Northland Constructors:** 2014-12-05 through current/open; derived from co-tenure at mine 2102999; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 4 historical accident/injury rows; 0 coded fatalities and 75 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 60 violation rows across the full record; 19 carry an S&S flag and $15,851 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 2 personal. 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 — 6 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 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 — 2 since 2021:** Inspections 28 inspection events and 232 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 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.3200 — Correction of hazardous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3200
- **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 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **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 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2016-03-11 through 2018-06-27; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-08-30 through 2022-08-30; source ID `msha-addresses`
- **Assessed Violations:** 58 rows; 2000-07-11 through 2019-08-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2006-04-11 through 2006-04-11; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 3 rows; 2005-09-29 through 2005-09-29; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 1989-08-01 through 2014-12-05; source ID `msha-controller-operator-history`
- **Inspections:** 28 rows; 2000-07-11 through 2022-08-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 108 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 21 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:** 2 rows; 2006-06-07 through 2006-06-07; source ID `msha-personal-health-samples`
- **Violations:** 60 rows; 2000-07-11 through 2019-08-20; 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/gp-500-2102999`
- JSON: `/api/v1/mines/gp-500-2102999`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2102999/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2102999/relationships`
- MCP resource: `mine://2102999/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`