Since 1997, OSHA inspectors have visited Denning Incorporated in Illinois 3 times.
The most recent inspection opened on Apr 7, 2026, in Downers Grove.
In all, OSHA issued 3 citation items: 2 serious and 1 other-than-serious.
The proposed penalties came to $9,165; today they stand at $5,440, 41% less.
The rule cited most here is 1926.501 (fall protection in construction), 2 times.
Among construction employers, the typical cited inspection since 2015 ends with a $3,080 penalty. Denning Incorporated averages $2,500 across 1 cited inspection.
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Watch this company2539 Ogden Ave., Downers Grove, IL 60515 · Plumbing, Heating, and Air-Conditioning Contractors · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 1926.501(b)(1) · Fall protection in construction |
Serious | $4,965 | $2,500 | May 26, 2026 | Final |
1028 S. York Road, Elmhurst, IL 60126 · Plumbing, Heating, and Air-Conditioning Contractors · OSHA's record · Phone and website on Google Maps
| Citation and rule | Type | Proposed | Current | Issued | Status |
|---|---|---|---|---|---|
| Citation 1, item 1 29 CFR 1926.417(b) · Lockout and tagging of circuits |
Serious | $4,200 | $2,940 | Dec 22, 2010 | Closed |
| Citation 2, item 1 29 CFR 1926.501(b)(1) · Fall protection in construction |
Other-than-serious | $0 | $0 | Dec 22, 2010 | Closed |
423 E. Dundee Road, Palatine, IL 60067 · OSHA's record · Phone and website on Google Maps
No citations from this inspection.
Current text from the Code of Federal Regulations. Some citations were issued under older wording.
29 CFR 1926.417(b)
(b) Equipment and circuits. Equipment or circuits that are deenergized shall be rendered inoperative and shall have tags attached at all points where such equipment or circuits can be energized.
29 CFR 1926.501(b)(1)
(b)(1) Unprotected sides and edges. Each employee on a walking/working surface (horizontal and vertical surface) with an unprotected side or edge which is 6 feet (1.8 m) or more above a lower level shall be protected from falling by the use of guardrail systems, safety net systems, or personal fall arrest systems.
Source: U.S. Department of Labor, OSHA enforcement data. A citation is OSHA's allegation; employers can contest it, and the status column shows where each item stands. Something wrong on this page? Tell us.