A contract employee who was injured Wednesday while working on the permanent pump project at the 17th Street Canal died Thursday, the U.S. Army Corps of Engineers said Friday.

The incident occurred while the employee, who was not identified, was working with concrete forms, which are used to ensure concrete dries into a specific shape. Few other details were available Friday.

Investigations are underway by the Corps and PCCP Constructors, the joint venture that employed the worker and is designing and building the permanent pumps and floodgates at the 17th Street, London Avenue and Orleans Avenue canals.

The 17th Street Canal forms part of the boundary between Orleans and Jefferson parishes.

The canal projects are the last major pieces of the $14.5 billion in upgrades to the area’s flood protection system authorized in the wake of the levee failures that led to catastrophic flooding after Hurricane Katrina.

“We extend our sincerest condolences to his family, friends and coworkers. Our deepest thoughts and prayers are with all of them during this very difficult time,” said Bob Kula with Kiewit Corp., one of the partners in PCCP. “The safety of those who work on our projects is our most fundamental value and top priority.”

He said PCCP “is conducting a thorough investigation and working closely with U.S. Army Corps of Engineers and other state and local authorities.”

It is against Army policy to comment on an incident while an investigation is ongoing, Corps spokesman Ricky Boyett said.

This is the third time a worker has died during construction on the new flood protection system. Two men were killed in separate incidents while working on two projects in April 2011: a levee in New Orleans East and a floodwall at Bayou Segnette State Park.

Follow Jeff Adelson on Twitter, @jadelson.