# North Lake Pit

- **MSHA mine ID:** 4700942
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Waukesha, WI
- **Operator:** Halquist Stone Company Inc
- **Controller:** Tom  Halquist; Bill  Halquist
- **Public source rows linked:** 498
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Tom  Halquist; Bill  Halquist (M00836) → Halquist Stone Company Inc (L00976) → North Lake Pit (4700942)**

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

## Controller and operator valid-time history

- **Halquist Stone Co Inc et al → North Lake Sand & Gravel:** 1981-11-01 through 2018-07-10; derived from co-tenure at mine 4700942; source `msha-controller-operator-history`.
- **L & W Construction Co Inc et al → North Lake Sand & Gravel:** 1981-11-01 through 2018-07-10; derived from co-tenure at mine 4700942; source `msha-controller-operator-history`.
- **Bill  Halquist et al → Halquist Stone Company Inc:** 2018-07-11 through current/open; derived from co-tenure at mine 4700942; source `msha-controller-operator-history`.
- **Tom  Halquist et al → Halquist Stone Company Inc:** 2018-07-11 through current/open; derived from co-tenure at mine 4700942; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 8
- 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 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 17 since 2021:** Violations and penalties 77 violation rows across the full record; 6 carry an S&S flag and $7,704 appears in current assessed amounts.
3. **HEALTH — 9 samples:** Occupational health samples 9 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 3K employee hours and 5 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 18 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 civil-penalty docket/decision rows, and 8 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 — 8 since 2021:** Inspections 51 inspection events and 707 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 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 47.44 — Temporary, portable containers.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **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 56.12028 — Testing grounding systems.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **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 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2021-03-26 through 2021-03-26; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-11-05 through 2025-11-05; source ID `msha-addresses`
- **Assessed Violations:** 77 rows; 2000-07-26 through 2026-03-03; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2010-11-02 through 2019-01-18; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 8 rows; 2003-08-07 through 2022-02-15; source ID `msha-conferences`
- **Contested Violations:** 5 rows; 2009-10-06 through 2018-07-24; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 1981-11-01 through 2018-07-11; source ID `msha-controller-operator-history`
- **Inspections:** 51 rows; 2000-04-12 through 2026-08-11; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 211 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 48 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:** 9 rows; 2001-07-11 through 2019-07-17; source ID `msha-personal-health-samples`
- **Violations:** 77 rows; 2000-07-26 through 2026-03-03; 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/north-lake-pit-4700942`
- JSON: `/api/v1/mines/north-lake-pit-4700942`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4700942/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4700942/relationships`
- MCP resource: `mine://4700942/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`