Underground Utility Estimators typically spend their days analyzing project plans, conducting site visits, and preparing accurate cost estimates for utility installations such as water, sewer, gas, and telecommunications lines. They gather material and labor cost data, review bid specifications, and coordinate with project managers, engineers, and subcontractors to clarify project requirements. Estimators also attend pre-bid meetings, communicate with suppliers for pricing, and prepare detailed bid proposals. This role requires balancing time between office-based data analysis and occasional fieldwork, ensuring all aspects of a project are accounted for in estimations.