A quartet of Colorado lawmakers recently revived their efforts to improve mail delivery service for Colorado’s mountain communities. On Tuesday morning, Senators Michael Bennet and John Hickenlooper and Representatives Joe Neguse and Brittany Pettersen shared an open letter they composed detailing their concerns and urging action, addressed directly to the heads of the U.S. Postal service.

The lawmakers previously raised their concerns in December, following an internal Postal Service audit of mail service in Colorado’s mountain towns that revealed staffing problems, disorganized and inefficient mail processing, and delivery delays.

“The USPS workforce in Colorado is under-staffed and often under-resourced,” the lawmakers wrote in a letter to Postmaster General Louis DeJoy and Deputy Postmaster General Douglas Tulino. “The lack of sufficient staffing at Colorado mail facilities is the biggest barrier to consistent and reliable mail service in Colorado. As a result, Colorado constituents have lost trust in the USPS to deliver timely prescription medications, financial documents and mail-in ballots, among other deliveries.”

The legislators urged the Postal Service heads to “address the personnel recruitment and retention challenges and enable pay increases to hire and retain postal workers.”

They argued that pay increases would immediately bolster recruitment and retention, resulting in “more consistent, on-time delivery and improved mail operations across our state.”

Bennet, Hickenlooper, Pettersen and Neguse have repeatedly called on the U.S. Postal Service to improve mail service for Coloradans. Last year, Bennet and Hickenlooper invited DeJoy to tour a mail facility in Colorado to see the ongoing service and delivery challenges that Coloradans face. And this April, Bennet and Hickenlooper successfully pushed the U.S. Postal Service to delay proposed changes to its Grand Junction processing and distribution center.