Question: Why did SeaWorld file against the DoL for the OSHA worker?
About the article "Blackfish (film)", section "SeaWorld response".

Candidate passages:
  On February 24, 2010, the orca Tilikum killed Dawn Brancheau, an experienced trainer, at the end of a "Dine with Shamu" show at SeaWorld Orlando.
SeaWorld officials confirmed that Tilikum grabbed Dawn Brancheau by her left arm and pulled her into the water, drowning her.
The autopsy determined that the trainer died of "multiple traumatic injuries and drowning".
Tilikum was involved in two previous fatalities.
See bullets February 20, 1991 and July 5, 1999.<br> Fallout from Brancheau's Death: SeaWorld has since been fined by OSHA for $75,000 for "willfully" endangering its employees.
OSHA stated that the company "(shows) Plain indifference to or intentional disregard for employee safety and health."
SeaWorld has challenged OSHA's claims stating that "OSHA's allegations in this citation are unsupported by any evidence or precedent and reflect a fundamental lack of understanding of the safety requirements associated with marine mammal care."
SeaWorld has taken OSHA to court to challenge the fine and safety report.
All three of SeaWorld's parks have not allowed their trainers in the water with the animals since the incident between Dawn and Tilikum.
In late May 2012, Judge Ken S. Welsch formally sided with OSHA over SeaWorld's killer whale safety practices following the death of Dawn Brancheau.
Welsch was sharply critical of SeaWorld's assertion that it was unaware that working with killer whales posed a hazard to employees.
Welsch stated it is "implausible" and "difficult to reconcile" with comments repeatedly made by management and with the litany of trainer incidents and injuries that have occurred over the years.
Welsch did, however, agree that the fine classification was too severe and had it downgraded– from "willful" ($75,000) to "serious" ($12,000) – stating that the company had emphasized trainer safety even if the safety procedures weren't effective.
Welsch made it clear that his ruling only applies "to the work trainers do during shows and not at other times, such as during medical procedures or 'relationship-building' sessions... As a custodian SeaWorld has an ethical duty to provide for the whales needs... husbandry activities require a certain amount of contact between the trainers and whales... unlike performances, which can successfully continue without the trainers in the water."
OSHA did state that they would accept other means of protection as long as it provided equal or greater safety as the physical barriers.
SeaWorld is currently testing quick rising pool floors and "spare air" systems in an attempt to get their staff back in the water during shows.
They have also started the appeals process to have Judge Welsch's ruling overturned.
But there has already been a set back because on July 17 of the same year an independent review commission in Washington refused to look over the case.
SeaWorld has yet to decide on their next course of action.
"SeaWorld will decide within the next 60 days whether to appeal to the United States Court of Appeals."
U.S. federal and state programs.OSHA.
The Occupational Safety and Health Administration (OSHA) within the U.S. Department of Labor (DOL) is the Federal agency with primary responsibility for setting and enforcing standards to promote safe and healthful working conditions for all workers.
Employers are responsible for becoming familiar with standards applicable to their establishments and for ensuring a safe working environment.
The National Institute for Occupational Safety and Health plays a lead role in efforts to reduce injuries and illnesses among working youth by conducting and supporting science to guide prevention efforts, disseminating findings, and working with others in collaborative outreach.
The U.S. Public Health Service has a Healthy People 2010 objective to reduce youth emergency department injury rates to 3.4 injuries/100 full-time equivalents by 2010.
The rate in 2003 was 4.4 injuries/100 full-time equivalents. 
Dol may refer to one of the following: 
SeaWorld's main attraction are its orcas, several of which are housed in 7-million-gallon habitats that are each known as Shamu Stadium.
Shamu was the name of the first orca brought to SeaWorld San Diego in the 1960s from the Seattle Marine Aquarium.
'Shamu' is now used as a stage name for orcas in performances at SeaWorld parks.
Currently, SeaWorld houses 23 orcas in its three parks.
Ten orcas live at Seaworld San Diego: Corky, Kasatka, Ulises, Orkid, Nakai, Ikaika, Kalia, Keet, Shouka and Makani.
Seven orcas live at SeaWorld Orlando: Katina, Tilikum, Kayla, Trua, Nalani, Makaio and Malia.
Six orcas live at SeaWorld San Antonio: Kyuquot, Unna, Takara, Sakari, Tuar, and Kamea.
SeaWorld also has five orcas on breeding loan: Keto, Tekoa, Kohana, Skyla and Adan.
Lists of other animals that can be found at each SeaWorld park can be found on each park's individual pages (SeaWorld San Diego, SeaWorld Orlando and SeaWorld San Antonio). 
Every shop at the school goes through a 10 hour OSHA training program.
This program is free and is mandatory for Co-Op.
The OSHA class is free of charge.