said by packetscan :

Depends..

Do you need to close the road at all?
-the township might require a police officer(s) to direct traffic.
Is it going in the ground?
- survey fees, researching other utilities in the area, cost of materials.
Are you using Overhead poles? Who owns these poles? do they require rent?

There are so many little things to think about including supplies, man power, depreciation on tools and vehicles.

If you have to open the road, Open your checkbook.
I had to fix a 4x6 ft section of roadway after fixing a sewer line. that was 5k. So dropping conduits must be about the same ball park.