A year after the District government literally cleaned up the federal government’s mess during the five-week government shutdown, D.C. Delegate Eleanor Holmes Norton is demanding that the National Park Service pay up.

While the longest partial shutdown in U.S. history shuttered the Smithsonian museums, trash pickup around the National Mall was virtually unaffected—thanks to the D.C. Department of Public Works, which dispatched workers to help. (Both the DowntownDC and the Capitol Hill Business Improvement District also pitched in.)

To clear litter at the 126 NPS properties across the District while federal workers were furloughed, the agency deployed extra workers to go out “as much as three times per day in some locations,” DPW’s then director, Christopher Shorter, told DCist at the time.

The load included an additional 604 trash bins on top of the 8,000 the Department of Public Works already collects daily.

In a letter to acting NPS Director David Vela, Norton writes that DPW docked over 460 hours of regular work and 1,100 overtime hours during the cleanup, to the tune of nearly $80,000. Norton says that the city has been trying to get reimbursed since last March to no avail.

“At the specific request of NPS, the District of Columbia assisted in maintaining federal parks that NPS was unable to maintain during the shutdown—at considerable expense to District taxpayers,” Norton said in a release, pledging to take congressional action if necessary. “Nearly a year has gone by since the District requested reimbursement and I have grown increasingly concerned by NPS’s lack of response.

NPS spokesperson Mike Litterst tells DCist in a statement, “The National Park Service appreciates the District’s assistance in maintaining the National Mall during the lapse in appropriations. We understand the importance of this issue and will respond to Congresswoman Norton with the status in the coming days.”

This story has been updated with a statement from NPS.