Key Takeaway
Smithson Valley Quarry is a active surface mine producing SandAndGravel, located in San Antonio, Bexar County, TX. It has 82 violations on record (27 S&S) and $83K in proposed penalties. Operated by Martin Marietta Materials Southwest LLC.
Smithson Valley Quarry
Operator: Martin Marietta Materials Southwest LLC
Controller: Martin Marietta Materials Inc
Location: San Antonio, Bexar County, TX
Employees: 12
Recent Violations
View all 82 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 04/10/2025 | 56.12004 | Non-S&S | ModNegligence | $151 |
| 01/22/2025 | 56.11003 | Non-S&S | ModNegligence | $151 |
| 08/14/2024 | 56.14132(b)(2) | Non-S&S | ModNegligence | $147 |
| 05/03/2023 | 56.12028 | Non-S&S | HighNegligence | $182 |
| 05/02/2023 | 56.14100(b) | Non-S&S | HighNegligence | $182 |
| 11/23/2022 | 56.12028 | Non-S&S | ModNegligence | $133 |
| 05/26/2022 | 56.14130(e)(1) | Non-S&S | LowNegligence | $133 |
| 07/08/2021 | 56.14211(c) | S&S | ModNegligence | $302 |
| 07/28/2020 | 56.12004 | Non-S&S | ModNegligence | $123 |
| 12/10/2019 | 56.14211(c) | Non-S&S | ModNegligence | $171 |
| 05/21/2019 | 56.12032 | Non-S&S | ModNegligence | $121 |
| 04/11/2018 | 56.9300(a) | Non-S&S | ModNegligence | $118 |
| 04/11/2018 | 56.20003(a) | Non-S&S | ModNegligence | $118 |
| 12/13/2017 | 46.3(i) | Non-S&S | HighNegligence | $118 |
| 12/13/2017 | 48.23(f) | Non-S&S | HighNegligence | $118 |
| 12/12/2017 | 46.5(a) | Non-S&S | ModNegligence | $128 |
| 03/30/2017 | 41.12 | Non-S&S | HighNegligence | $135 |
| 03/29/2017 | 56.4201(a)(1) | Non-S&S | ModNegligence | $148 |
| 03/28/2017 | 56.12030 | Non-S&S | ModNegligence | $148 |
| 03/28/2017 | 46.5(a) | S&S | HighNegligence | $8,994 |
Accidents & Injuries
View all 2 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 07/07/2005 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 08/12/2003 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 29d lost |
Inspections
View all 47 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 04/10/2025 | 04/10/2025 | 5.00 | 1 |
| 01/22/2025 | 01/22/2025 | 7.25 | 1 |
| 08/13/2024 | 08/16/2024 | 16.25 | 1 |
| 11/12/2023 | 11/13/2023 | 0.00 | 0 |
| 05/01/2023 | 05/11/2023 | 31.25 | 1 |
| 11/21/2022 | 11/28/2022 | 11.00 | 1 |
| 07/05/2022 | 07/05/2022 | 2.00 | 1 |
| 05/26/2022 | 05/26/2022 | 8.25 | 1 |
| 01/31/2022 | 01/31/2022 | 5.50 | 1 |
| 07/08/2021 | 07/08/2021 | 5.25 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Smithson Valley Quarry have?
Smithson Valley Quarry has 82 MSHA violations on record, of which 27 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $83K.
What type of mine is Smithson Valley Quarry?
Smithson Valley Quarry is a Surface mine producing SandAndGravel, located in San Antonio, Bexar County, TX. It currently has 12 employees.
Has anyone been injured or killed at Smithson Valley Quarry?
According to MSHA records, Smithson Valley Quarry has 2 reported accident/injury records and 0 fatalities on file.
Who operates Smithson Valley Quarry?
Smithson Valley Quarry is operated by Martin Marietta Materials Southwest LLC and controlled by Martin Marietta Materials Inc. MSHA Mine ID: 4104108.