Colorado authorities arrested 471 people for driving under the influence of alcohol or drugs over the St. Patrick's Day weekend.

The Colorado Department of Transportation and the State Patrol partnered with 92 law enforcement agencies throughout the state from Friday, March 14, through Tuesday, March 18, to increase DUI enforcement, CDOT said.

Preliminary reports show one alcohol-related fatality.

The number of arrests is down from the same period last year, when law enforcement initiated 486 DUI arrests.

This year, the State Patrol made the most arrests with 96. Denver police arrested 45, Colorado Springs police arrested 41 and Aurora arrested 28.

"Each DUI enforcement period demonstrates that law enforcement agencies — whether large or small, rural or urban — are dedicated to working together to keep Colorado's roads safe," said Col. Scott Hernandez, chief of the State Patrol.

"Even with our efforts, the St. Patrick's Day weekend's arrests underscore the major impaired driving problem in Colorado, and we will continue our increased public education and enforcement work."