Getting Quotes For Civil Engineering

[Jamie Parker]

I am under contract with a land deal, on Marrowbone Lake In Joelton. After talking with planning they mentioned that utilities were 2 miles (10,000+) ft away. However after being directed to Metro Water, They mention that the nearest services, are a 1000 ft away. I checked with the state and the state will not allow utilities to be ran underwater to the property across the lake. So Basically as mentioned by Metro Water, consulting with a Civil Engineer to get a quote to understand the projected cost of the project. 

When working with Civil Engineering, Is it best to simple pick on firm and go with them, Or is the 3 quote rule in effect at this stage of the process?  What are some best practices when working through due diligence at the phase of projecting cost?