Underground and submerged utility lines and facilities; revise requirements for excavators and utility operators.

Title updated to reflect the bill's current status as it passed the House committee stage.

Added new definitions for 'large project excavation,' 'submerged excavation,' 'marine exclusion zone,' 'preconstruction meeting,' and 'electronic pre-marking' to clarify regulatory requirements.

Extended marking validity from 14 to 20 calendar days for standard excavations and from 14 to 30 calendar days for submerged excavations.

Requires excavators of large projects to request preconstruction meetings with utility operators at least 10 working days before excavation begins.

Mandates electronic pre-marking of excavation boundaries before submitting locate requests to improve operator awareness.

Requires excavators to provide contact information for a person available to discuss the excavation with operators for both emergency and impending emergency excavations.

Added consent requirements for excavating within marine exclusion zones surrounding submerged facilities.

Updated utility marking color codes and added requirements for electronic locating methods for facilities installed after January 1, 2010.

Changed notice requirements for impending emergencies to provide at least 12 hours notice instead of the previous standard timeframe.