SPRING VALLEY, CA — 2025-03-17 00:00:00

OSHA Inspection: CORNERSTONE AGGREGATES, INC.

Accident-driven inspection · Safety discipline

At a glance

On 2025-03-17 00:00:00, OSHA opened an accident-driven safety inspection of CORNERSTONE AGGREGATES, INC. in 332 ELKELTON PLACE, SPRING VALLEY, CA 91977 (NAICS 327390). OSHA activity number 348112103.

What this inspection record means

OSHA opens inspections for many reasons — routine scheduling under a national or local emphasis program, an employee complaint or referral, or a follow-up after a reported injury. Opening or conducting an inspection is not itself an allegation or a finding that this employer broke any rule; any findings appear as the citations listed below, and citations can be contested, reduced, or withdrawn.

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Where did this inspection happen?

Establishment: CORNERSTONE AGGREGATES, INC.
Site address: 332 ELKELTON PLACE
City: SPRING VALLEY
State: CA
ZIP: 91977
Mailing: PO BOX 1874, ALPINE, CA 91903

What kind of inspection was it?

Inspection type: Accident-driven (A)
Scope: Partial (B)
Discipline: Safety
Advance notice: No
Union status: B

When did the case open and close?

Opened: 2025-03-17 00:00:00
Closing conference: 2025-08-21 00:00:00
Last modified: 2026-07-21 00:00:00
Data loaded: 2026-07-22 00:20:17

Establishment context

NAICS code: 327390
Employees: 19
Ownership type: A

Citations

3 citations on file for this inspection.

3314(G)(2)(A)

Other-than-serious Gravity 5 1 instance 20 exposed

Issued: Aug 21, 2025
Abate by: Oct 8, 2025
Penalty: Initial $420 · Current $420

Recent events (1)

2025-08-21 00:00:00 — Z (O) $420

3314(C)

Serious Gravity 10 1 instance 18 exposed

Issued: Aug 21, 2025
Penalty: Initial $5,060 · Current $5,060

Recent events (1)

2025-08-21 00:00:00 — Z (S) $5060

4070(A)

Serious Gravity 10 1 instance 19 exposed

Issued: Aug 21, 2025
Penalty: Initial $15,750 · Current $15,750

Recent events (1)

2025-08-21 00:00:00 — Z (S) $15750

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Source

This record is reproduced from the U.S. Department of Labor Open Data API (OSHA inspection dataset). The original IMIS detail view is available at OSHA's Establishment Search for activity number 348112103.

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