Capitol officials give a detailed look at the toll the riot has taken on its employees and art.

Top Capitol officials on Wednesday are giving the first extensive look at the damage inflicted on the House fine art collection and the strain on congressional employees from the Jan. 6 attack as lawmakers begin to put together money to address the emergency costs.

With $30 million already transferred to the Architect of the Capitol to maintain the temporary fencing around the Capitol complex and support National Guard troops stationed in the building, additional funds will most likely be needed for the intensified security measures and to support its inhabitants.

In prepared testimony before lawmakers on the House Appropriations Committee, J. Brett Blanton, the Architect of the Capitol; Catherine Szpindor, the chief administration officer; and Farar Elliott, the House curator, outlined the increased strain on the Capitol’s resources caused by the siege. Their accounts underscore the challenge of ensuring the ongoing preservation of both the historic elements of the Capitol and the support of hundreds of employees traumatized by the invasion of their workplace.

While some of the prized pieces in the House collection were saved by curatorial workers — including the House’s 1819 silver inkstand, the oldest object in the chamber — statues, busts and paintings were damaged during the siege. Most of the items are in hallways near the House chamber, and were largely damaged by chemical sprays used during the attack. The cost to conserve and repair the items will be about $25,000, Ms. Elliott will testify.

Far more difficult to ascertain is the burden on the hundreds of Capitol Hill staff, many of whom sheltered in place on the Capitol grounds as the mob ransacked the building and broke through doors and windows.

The Office of Employee Assistance typically handles about 3,000 individual interactions with employees and managers a year. But in the six weeks since Jan. 6, the office has experienced a “surge” in counseling needs, with more than 1,150 interactions with employees, managers and members of Congress, Ms. Szpindor said.

“At this rate, counseling and consultation services in 2021 would increase by 65 percent over 2020 and by 200 percent as compared to more ‘typical’ recent years,” she planned to testify. “While the team’s initial response to the insurrection is commendable, it soon became evident that the caseload would require additional resources.”