# Portable Desander

- **MSHA mine ID:** 4105365
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Oldham, TX
- **Operator:** J. Lee Milligan, Inc.
- **Controller:** Doug  Walterscheid
- **Public source rows linked:** 46
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Doug  Walterscheid (0058711) → J. Lee Milligan, Inc. (L02254) → Portable Desander (4105365)**

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

## Controller and operator valid-time history

- **Doug  Walterscheid et al → J. Lee Milligan, Inc.:** 2018-06-14 through current/open; derived from co-tenure at mine 4105365; source `msha-controller-operator-history`.
- **Ruth S  Wall et al → J. Lee Milligan, Inc.:** 2018-06-14 through 2005-12-22; derived from co-tenure at mine 4105365; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- Interval anomalies: 1
- 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 2 historical accident/injury rows; 0 coded fatalities and 67 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 4 violation rows across the full record; 0 carry an S&S flag and $484 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 10 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 4 inspection events and 32 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 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 56.12028 — 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 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2020-11-14 through 2021-02-10; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2021-03-04 through 2021-03-04; source ID `msha-addresses`
- **Assessed Violations:** 4 rows; 2018-12-12 through 2019-10-08; source ID `msha-assessed-violations`
- **Controller and Operator History:** 2 rows; 2018-06-14 through 2018-06-14; source ID `msha-controller-operator-history`
- **Inspections:** 4 rows; 2018-12-11 through 2019-10-08; 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:** 7 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 4 rows; 2018-12-12 through 2019-10-08; 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/portable-desander-4105365`
- JSON: `/api/v1/mines/portable-desander-4105365`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4105365/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4105365/relationships`
- MCP resource: `mine://4105365/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`