It appears the four workers who fell 25 feet after a wall collapsed at the north end of Seattle's deep bore tunnel project last month are part of a pattern. After reviewing records from state regulators, the Associated Press reports that more tunnel project workers were injured last year than in 2013 and 2012 put together.

Injuries since 2012 have created $1 million of workers' compensation claims already, according to the AP. The growing number of injuries in 2014 is especially troubling in light of the fact that the state's contractor recorded fewer hours of work than it had in 2013.

Even more troubling: The AP didn't take into account the full set of 2014 claim numbers. "The agency did not have complete claim amounts for the end of 2014 so that total will increase. It also did not have data for 2015," the report read.

WSDOT has repeatedly emphasized worker safety at public meetings, but a representative from the Seattle/King County Building and Construction Trades Council told the AP that the state's contractor, Seattle Tunnel Partners, lacks a culture of safety.

Read the rest of the report here, including WSDOT's response.