Case study · Road & bridge micropiles
New Lyons Bridge
14 six-inch micropiles for a new bridge in Lyons, Colorado, rebuilt after the 2013 flood, proof load tested to 48 kips.
The project
New Lyons Bridge
The 2013 flood that tore through Lyons, Colorado destroyed many homes, driveways and bridges. Park Range Construction helped rebuild part of the community with the foundation for a new bridge in Boulder County.
We drilled 14 six-inch micropiles to a depth of 25 feet, each with 10 feet of 5½-inch threaded casing and 15 feet of bond length.
A proof load test to 48 kips confirmed the design.
Scope of work
- 14 six-inch micropiles to 25 ft
- 10 ft of 5½-inch threaded casing, 15 ft bond length
- Proof load test to 48 kips
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