I have no experience with mining but as a Structural Engineer who is a client of many Civil Engineers and works very closely with them in the transportation industry I can tell you a few things:
1. On a standard design-bid-build contract the Civil Engineers are the ones that get the large contracts with the government agency and then end up hiring the Surveyor, Geotechnical, Structural, and Electrical Engineer (if they don't already have them in-house). Since they are the prime consultant, they many times get the larger percentage of the design fees.
2. The Civil Engineers in my city are usually the ones with the big fancy offices in the higher priced downtown area.
3. They many times dictate the direction of the project.
4. Their work is not as "technical" as the other disciplines but involves overall management of the project and their sub-consultants work. They are responsible for designing roadways for projected future traffic counts, establishing both vertical and horizontal roadway alignment, permitting, utility layout, hydraulics, traffic signal design, temporary traffic control or construction phasing plans, BMP plans, signage and striping of roadways, and grading plans.
Similar to GeoEnvGuy, there are a lot of "standard" details that get recycled. Especially when it comes to BMP plans but if you are working on a design for something new, there are plenty of unique details to create. With that being said, I do know some Civil Engineers that don't get to do anything real exciting. I wouldn't last long in some of those more passive roles. However, I think you can find this in all facets of Engineering.