A contractor who does a significant amount of work for Dallas’ City Hall has been cited by the Occupational Safety and Health Administration (OSHA) for hazards at a site the company was working on this past February.

Oscar Renda Contracting, who has done more than $450 million in work for the city of Dallas, was handed 11 serious safety violations, two other-than-serious violations and one willful violation after inspectors visited a drainage site they were working on in Houston. The proposed penalties total $124,300, $70,000 for the willful fine alone. The company says they have not done anything wrong.

OSHA inspectors found that the company was exposing workers to hazards, especially those working in trenches. An inspector performed an on-the-spot inspection after driving by the worksite and noticing that the trenching work was not being performed safely. OSHA can perform such inspections if the violations are in plain view. They were given a willful violation because they failed to secure trenches with the proper benching or sloping techniques, which could lead to the walls collapsing and burying workers in the trench. They were also cited for failing to have a supervisor check the entries of the trench before workers went in, for failing to provide rescue equipment, for failing to verify that the permit-required trenches were even safe to enter, and for failing to train employees in the correct safety practices of their jobs.

The company’s safety director, Dan Yanes, said that the company will respond and challenge the accusations. He claims that the company has not ignored risks or unsafe conditions that might put workers in danger and that the OSHA accusations are false.

The OSHA area director for Houston, Mark Briggs, said that they have found this company to be in violation of safety practices six different times in the last decade.