Bureau of Reclamation Security Response Force
The Bureau of Reclamation Security Response Force (USBR SRF), is the federal security guard force of the United States Bureau of Reclamation (USBR), part of the United States Department of the Interior (DOI). The Security Response Force replaced the former Hoover Dam Police, in 2017.
Source: Wikipedia — Bureau of Reclamation Security Response Force (CC BY-SA 4.0)