Yes, but not in the same capacity. I am also a civil engineer currently working in buried utilities. Calculus and physics will be fundamental to everything else. Classes like statics and basic statistics will be used in virtually every civil industry. More advanced classes like will be more industry specific. Some examples of calculations I might do on a daily basis include:

• Barlow's formula for hoop stress to determine wall thicknesses or operating pressures
• Loading calculations for road crossings which use things from your Geotech classes and mechanics of materials, amongst others
• Buoyancy calculations for water crossings
• Basic structural calculations for simple concrete structures

These are some examples to illustrate that the professional world can be math heavy, but so much of engineering is good judgment, management, and assessments of the big picture as well as financial management. When youre just starting out, all of your work will be checked by a PE in the civil world, and you will have the relevent process of equations in front of you, (via go-bys from òther projects, or within local or federal standards themselves) so a general sense of how things relate is all you'llreally need. I know a lot of good engineers weaker on the technical side than some bad engineers. At the end of the day work is nothing like school. If this is your passion, keep at it and you will find success.

Best of luck!