TranslateInspection Detail
Inspection: 312896111 - Hydro Arch
Inspection Information - Office: Nevada Las Vegas
Site Address:
Hydro Arch
Lake Las Vegas Bypass Conduit
Henderson, NV 89015
Mailing Address:
980 Mary Crest Road, Henderson, NV 89014
Union Status: NonUnion
SIC:1771
NAICS: 238990/All Other Specialty Trade Contractors
Inspection Type: Accident
Scope: Partial
Advanced Notice: N
Ownership: Private
Safety/Health: Health
Close Conference: 02/02/2009
Emphasis: S:Construction
Case Closed: 03/26/2009
| Type | Activity Nr | Safety | Health |
|---|---|---|---|
| Accident | 101045318 |
| Violations/Penalties | Serious | Willful | Repeat | Other | Unclass | Total |
|---|---|---|---|---|---|---|
| Initial Violations | 3 | 3 | ||||
| Current Violations | 3 | 3 | ||||
| Initial Penalty | $7,500 | $0 | $0 | $0 | $0 | $7,500 |
| Current Penalty | $5,625 | $0 | $0 | $0 | $0 | $5,625 |
| FTA Penalty | $0 | $0 | $0 | $0 | $0 | $0 |
| # | Citation ID | Citaton Type | Standard Cited | Issuance Date | Abatement Due Date | Current Penalty | Initial Penalty | FTA Penalty | Contest | Latest Event | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 01001A | Serious | 19260307 D01 | 02/20/2009 | 02/25/2009 | $1,875 | $2,500 | $0 | 03/02/2009 | W - Empr Withdrew | |
| 2. | 01001B | Serious | 19260307 E03 I | 02/20/2009 | 02/25/2009 | $0 | $0 | $0 | 03/02/2009 | W - Empr Withdrew | |
| 3. | 01002A | Serious | 19260403 D01 | 02/20/2009 | 02/25/2009 | $1,875 | $2,500 | $0 | 03/02/2009 | W - Empr Withdrew | |
| 4. | 01002B | Serious | 19260403 I01 II | 02/20/2009 | 02/25/2009 | $0 | $0 | $0 | 03/02/2009 | W - Empr Withdrew | |
| 5. | 01002C | Serious | 19260403 I01 III | 02/20/2009 | 02/25/2009 | $0 | $0 | $0 | 03/02/2009 | W - Empr Withdrew | |
| 6. | 01003A | Serious | 19260800 K01 II | 02/20/2009 | 02/25/2009 | $1,875 | $2,500 | $0 | 03/02/2009 | W - Empr Withdrew | |
| 7. | 01003B | Serious | 19260800 K10 I | 02/20/2009 | 02/25/2009 | $0 | $0 | $0 | 03/02/2009 | W - Empr Withdrew |
Investigation Summary
On December 10, 2008, Employees #1 though #5, with Hydro-Arch, were repairing the floor of the south bypass conduit water tunnel located under Lake Las Vegas in Henderson, Nevada. The tunnel was two miles long and seven feet in diameter. They had cleaned the floor of the tunnel and were preparing to pour concrete on the tunnel floor. Two coworkers initially entered the tunnel with a golf cart at approximately 7:45 a.m. to drop off equipment after activating the ventilation fan from outside. Approximately 8:00 a.m., they exited the tunnel to wait for the concrete truck to arrive at the site. Approximately 9:30 a.m., Employees #1 through #5 entered the tunnel with the concrete load. Concrete was carried in eight buggy carts pulled by bobcat. Behind them, the mechanic and Project Superintendent followed on a propane-operated golf cart. Around 10:00 a.m., these employees arrived at the work location and found that the mechanical ventilation fan had been shut down. Several unsuccessful attempts were made to start the fan. The Project Superintendent and foreman decided that work would continue, after measuring the natural air flow using a handheld Mini Thermo-Anemometer by Extech Instrument. At 11:15 a.m., the foreman radioed from inside tunnel that employees were experiencing difficulty breathing, chest pains, and fatigue. The project superintendent sent golf carts and removed all employees from the tunnel about 12:16 p.m. Employees #1 through #5 were treated for asphyxia and carbon monoxide poisoning at University Medical Center (UMC) in Las Vegas and St. Rose De Lima in Henderson. All five employees were treated at UMC with hyper-oxygen therapy. Reports from the employer confirmed that employees' carboxy-hemoglobin concentrations ranged between 12 and 32.
Keywords:chest, tunnel, asphyxiated, repair, ventilation, inhalation, respiratory tract, carboxyhemoglobin, carbon monoxide, concrete
| # | Inspection | Age | Sex | Degree | Nature | Occupation |
|---|---|---|---|---|---|---|
| 1 | 312896111 | Non Hospitalized injury | Asphyxia | Concrete and terrazzo finishers | ||
| 2 | 312896111 | Non Hospitalized injury | Asphyxia | Concrete and terrazzo finishers | ||
| 3 | 312896111 | Non Hospitalized injury | Asphyxia | Concrete and terrazzo finishers | ||
| 4 | 312896111 | Non Hospitalized injury | Asphyxia | Concrete and terrazzo finishers | ||
| 5 | 312896111 | Non Hospitalized injury | Asphyxia | Concrete and terrazzo finishers |