The Mazda-Toyota Manufacturing USA plant and related industries popping up in Huntsville-annexed Limestone County have county officials scrambling to provide quality services for the projected influx of development in that part of the county.

The Limestone County Water and Sewer Authority is no different, and at its meeting Thursday, the authority board heard from two engineers at Inflow Design, of Brentwood, Tennessee, on how the authority could prepare themselves for a possible increase in development.

Barney Fullington and Kevin Colvett with Inflow gave an hourlong PowerPoint presentation to the board on the results of a study that Inflow did at the authority’s request. The scope of the study was to evaluate options for long-term sewer service in the rapidly growing area of east Limestone County.

Currently, LCWSA contracts with Huntsville Water Pollution Control for service in that part of the county. The study’s purpose was to determine whether an increase in development and population would make it worth the authority ending its agreement with Huntsville WPC, building its own wastewater treatment plant in the area and providing service independently.

The answer: It depends.

The study showed continuing the current agreement would cost about $38.2 million over the next 30 years, while building a new wastewater treatment plant and providing service independently would cost about $38.5 million over 30 years.

However, that cost would depend on the amount of growth over that time period. The study was done with a 3% projected growth rate. More or less growth could affect what decision the authority should take, Fullington said.

“The faster this area grows, the more economically feasible a new wastewater treatment plant becomes,” Fullington said. “If you saw faster than a 3% growth rate, then all of a sudden the master plan is outdated. If you plugged in a 5% growth rate, a new treatment plant would look more economically feasible than sending water to Huntsville.”

The reason for that was shown in a chart. The first several years after a treatment plant would be built, the authority would operate at a deficit due to the cost of building. However, eventually, that would turn into a profit as more homes are connected to the authority. Fullington said Inflow calculated the cost of building a new treatment plant would be a $15 million debt issuance with a 2% interest rate.

Eventually, the cost of building a new plant and servicing the area independently would be a much better option than continuing the agreement with Huntsville, the engineers said.

LCWSA CEO Daryl Williamson said the authority will continue to study the situation as it determines the best course of action.

“This is just our first glance at it, with many more glances to come over the next five-year period as we watch growth,” Williamson said. “We did a master plan early in the year and projected the growth rate. If the system sees growth that is greater than what our projections are, then we need to look at that plan a little sooner rather than later. We’ve just got to keep evaluating and see how many homes get built and what the time frame is.”

Other business

In other business, the authority approved a bid from Cleary Construction for sewer rehabilitation at the Delphi property. The bid was for $979,790.

The authority also approved an agreement to purchase 300 meters and communication equipment for the Elkmont area. The meters are made by the Badger company and send a signal through cellphone towers back to LCSWA so authority employees no longer have to send a technician to read the meter in person.

The authority is involved in a pilot program for the meters and communication devices to see if they would better than the current meters made by the Mueller company, which send a signal via radio frequency and are not always reliable, Williamson said.

“Mueller meters are fine, but their communication devices struggle at times,” he said. “The integrity of what we’re sending out in bills is fine, but sometimes we have to duplicate work and send technicians out to read the meter. We’re looking at a different platform to see if we can get a better read accuracy out of the system.”