Safety Incidents OSHA Severe Injury Reports · 2015–2025
5,189,992Inspections Most recent open 2026-07-18 Last loaded 2026-07-22

OSHA Inspection: DIAMOND MATERIALS, LLC

Referral inspection · Safety discipline

On , OSHA opened a referral safety inspection of DIAMOND MATERIALS, LLC in 620 A STREET, WILMINGTON, DE 19801 (NAICS 237310). OSHA activity number 345863062.

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employer broke any rule; any findings appear as the citations listed below, and citations can be contested, reduced, or withdrawn.

Watch Diamond Materials, LLC — free Get an email when a new federal OSHA severe-injury report for Diamond Materials, LLC is published. One employer, no account, unsubscribe in one click.
Site address
620 A STREET
City
WILMINGTON
State
DE
ZIP
19801
Mailing
242 N. JAMES ST, NEWPORT, DE 19804
Inspection type
Referral (C)
Scope
Partial (B)
Discipline
Safety
Advance notice
No
Union status
B
Opened
Closing conference
Case closed
Last modified
Data loaded
NAICS code
237310
Employees
1
Ownership type
A

4 citations on file for this inspection.

1926.20 B02

Other-than-serious Gravity 5 1 instance 4 exposed
Issued
Sep 23, 2022
Abate by
Oct 20, 2022
Penalty
Initial $8,702 · Current $6,091 Reduced
29 CFR 1926.20(b)(2): The employer did not initiate and maintain programs which provided for frequent and regular inspections of the job site, materials and equipment to be made by a competent person(s):  a) 620 A Street, Wilmington, DE 19801(East Bound Lane): On or about March 29, 2022, the employer failed to ensure frequent and regular inspections of the jobsite and equipment were conducted by a person competent in work zone safety standards which resulted in several hazardous conditions which exposed employees to struck by/caught in between hazards as they performed sewer maintenance.
Recent events (2)
  • — I (O) $6091.4
  • — Z (S) $8702

1926.21 B02

Other-than-serious Gravity 5 1 instance 4 exposed
Issued
Sep 23, 2022
Abate by
Oct 13, 2022
Penalty
Initial $0 · Current $0
29 CFR 1926.21(b)(2): The employer did not instruct each employee in the recognition and avoidance of unsafe conditions and the regulations applicable to his/her environment to control or eliminate any hazards or other exposure to illness or injury:  a) 620 A Street, Wilmington, DE 19801(East Bound Lane): On or about March 29, 2022, , the employer failed to ensure employees were trained in work zone safety standards and on site specific conditions, procedures and traffic control plans/concepts which resulted in several hazardous conditions that exposed employees to struck by/caught in hazards when they performing sewer maintenance activities.
Recent events (2)
  • — I (O) $0
  • — Z (S) $0

1926.200 G01

Serious Gravity 5 1 instance 4 exposed
Issued
Sep 23, 2022
Penalty
Initial $8,702 · Current $6,091 Reduced
29 CFR 1926.200(g)(1): Construction areas were not posted with legible traffic signs at points of hazards:  a) 620 A Street, Wilmington, DE 19801(East Bound Lane): On or about March 29, 2022, the employer failed to provide signs visible to the public while traveling East and West on A Street to assist traffic in understanding traffic pattern changes due to sewer maintenance repair work as stated in the MUTCD Section 6G.07. This exposed employees to multiple hazards onsite including but not limited to struck by/ caught in hazards when they performed sewer maintenance work.
Recent events (2)
  • — I (S) $6091.4
  • — Z (S) $8702

1926.200 G02

Serious Gravity 5 1 instance 4 exposed
Issued
Sep 23, 2022
Penalty
Initial $0 · Current $0
29 CFR 1926.200(g)(2): Traffic control signs or devices used for protection of construction workers did not conform to Part VI of the Manual of Uniform Traffic Control Devices (AMUTCD"), 1988 Edition, Revision 3, September 3, 1993, FHWA-SA-94-027 or Part VI of the Manual on Uniform Traffic Control Devices, Millennium Edition, December 2000, FHWA.  a) 620 A Street, Wilmington, DE 19801(East Bound Lane): On or about March 29, 2022, the employer failed to provide a taper and signs visible to the public while traveling East and West on A Street to assist traffic in understanding traffic pattern changes due to sewer maintenance work. Employees were walking back and forth in an unbarricaded work zone with no legible signage to warn motorist of activities ahead as stated in the MUTCD Section 6C.08. This exposed employees to multiple hazards onsite including but not limited to struck by/ caught in hazards when they performed site sewer maintenance work.
Recent events (2)
  • — I (S) $0
  • — Z (S) $0

View Diamond Materials, LLC's full OSHA safety record →

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 345863062.

Look up any company's OSHA accident reports by company, or browse severe injury reports by year, state, and company.