In Lyons, satellite imagery and analysis from DigitalGlobe confirm that the McConnell Drive Bridge was washed away completely. Ongoing flooding is also visible along the St. Vrain River that exits Lyons to the southeast.
Southwest of Lyons, along the South St. Vrain Creek, extensive damage to Colorado Highway 7 is visible.
The St. Vrain River flows from Lyons to Longmont. The next slide shows the affected flooded areas between the locations. Out on the plains, the water pushed through, over and around the embankments meant to control the river.
Longmont bore the brunt of the St. Vrain flooding. The river enters the city on the west side, near the Vance Brand airport, and nearly bisects the city. The flood waters spread through the city,
Several miles south of Longmont, along 95th Street, Boulder Creek washed across the low-lying areas of the roadway.