Environmental Surveys Engineering Design Services A Strong Foundation Hydro Consultants was founded in Baton Rouge, Louisiana in 1984 by a group of talented surveying and mapping... contributions to two surveying textbooks used by surveying and civil engineering departments at over 300 colleges and universities nationwide. Additionally, Mr. Gammon has been...Hydro Consultants, Inc. About Us An Outstanding Reputation A company is known by the clients it keeps! Hydro Consultants routinely provides surveying, engineering, and mapping...