U.S. House and Senate Democrats, mostly from Western states, are demanding transparency from the Interior Department after media reports revealed the Trump administration redirected roughly $90 million in national parks fees to help fund renovations and upcoming celebratory displays in Washington, D.C.

The administration’s use of fee revenues to pay for fountain repairs, statue upgrades and fireworks shows in preparation for America’s 250th birthday on July 4 diverts money from national parks in desperate need of billions of dollars in maintenance, lawmakers wrote in two separate early-June letters to Secretary of the Interior Doug Burgum.

“The public deserves to know how their park fees are being spent, and Congress cannot conduct appropriate oversight without basic information about these transactions,” Rep. Gabe Vasquez of New Mexico and seven other Democratic representatives wrote in their letter, dated June 12.