HB3634 Summary: Illinois Underground Utility Facilities Damage Prevention Act

• Amends the Illinois Underground Utility Facilities Damage Prevention Act to establish additional requirements for excavators performing nonemergency and emergency excavation or demolition work.

• Requires excavators to provide 48 hours to 14 calendar days advance notice to one-call notice systems before excavation begins, with notice valid for 28 calendar days and extensible for additional 28-day periods.

• Establishes tolerance zones for underground utility facilities based on facility diameter and marking, with special 10-foot zones for subaqueous facilities, and requires extra care including hand excavation or vacuum excavation within these zones.

• Creates new notification requirements for damaged, dislocated, and exposed underground utility facilities, with specified minimum information that must be reported to the one-call notice system.

• Sets penalties ranging from $1,000 to $5,000 for excavators failing to provide proper notice or comply with marking requirements, and up to $5,000 for utility owners/operators failing to mark facilities or respond to notices within required timeframes.