Henry County Water Authority spokesman Chris Wood said the main, which runs east to west through the county, will provide an easier way to transport drinking water and help with production and distribution.
Pat Hembree, the authority division manager who provided oversight of the project, said the east to west connection will serve “big benefits” to residents.
“It provides more ability to move water through the city and helps with overall circulation of water throughout the county,” he said.
The project will connect the 48-inch transmission main leaving the Tussahaw Water Treatment Facility to an area of the distribution system served primarily from the Towaliga Water Treatment Plant.
The main will also allow the authority to shut down either plant for rehabilitations or emergencies without service interruptions to any customers.
The plants treat and provide clean drinking water to about 209,000 county residents.
Building the main began in 2005 and has gone through three phases.
The first phase, completed in 2011, cost the county $2.6 million and was about 4.7 miles long.
The Georgia Environmental Finance Authority provided the loan for the work completed by Lithonia-based construction company MidSouth Builders Inc.
The second phase spanned from 2011 to 2013 and was broken into two separate stages funded by authority capital improvement funds.
The last phase of building, which occurred along Peeksville Road, Colvin Drive and Ga. 42, provided about 6.6 miles of the main.
It consists of 35,000 linear feet of 24-inch ductile iron.
The transmission main route will run northwest from Old Jackson Road to southeast Henry County.
“The cost of the second building contract with Gary’s Grading and Pipeline Co. was about $3.65 million and was well under the $4.4 million budget for this portion of [the main],” Wood said.
He said having an annual labor contract with the company was a better choice financially, not only for this project, but for future endeavors.
“A low bid for annual labor rather than paying project-to-project was a good management move for the authority,” Wood said.
He said state and federal regulators encouraged annual labor contracts in case of emergencies.
Hembree said he was impressed with the work provided by the construction company under annual contract.
The work went very well he said.
“All three phases of the main’s construction took a great deal of time to plan and execute, approximately a decade in all,” said Hembree.