Clearing an afternoon wreck in Castle Rock was like "loading an Easter egg on a flatbed", troopers said on Twitter.

Just before 3 p.m., a cement mixer tipped on Highlands Ranch Parkway at Highway 85, hitting a van and causing a traffic mess.

Some fuel and cement spilled onto the roadway, prompting an hourslong closure of Highlands Ranch Parkway.

The road reopened around 6 p.m.

A trooper's car was hit in a secondary crash.