Posted: 12:00 a.m. Sunday, Feb. 23, 2014
By
Asher Price
-
American-Statesman Staff
DRIPPING SPRINGS —
Gearing
up for a seemingly ever-increasing population, this once-sleepy outpost
west of Austin is plotting an expansion of its sewage treatment plant
for as much as $28.6 million, the latest sign of massive growth in
northern Hays County.
City officials say the infrastructure move
is a responsible one because it would prevent a proliferation of smaller
plants in the region, but it has alienated some of their former
regional allies in bygone environmental battles.
If an expansion
is approved by a state environmental agency, something probably years
away, the plant could be the second to have a permit to discharge
cleaned-up waste water into a Hill Country creek that eventually feeds
the Barton Springs portion of the Edwards Aquifer.
Nearly a decade
ago, Dripping Springs had teamed up with the city of Austin, the Barton
Springs-Edwards Aquifer Groundwater Conservation District and other
governmental entities to oppose a similar plant proposed — and
eventually built — for Belterra, a burgeoning subdivision just east of
Dripping Springs. At the time, Dripping Springs had been a key player in
a regional planning effort to manage development.
Now it is
Dripping Springs that is considering an expanded plant as it both copes
with a growing population and positions itself to recruit new
businesses.
Dripping Springs has increased from about 1,500
residents in 2000 to nearly 1,900 in 2012, according to census figures.
Roughly 30,000 people live in the wider community around the city.
The
existing wastewater treatment plant, built to replace antiquated septic
systems, has a capacity to treat 127,500 gallons per day and currently
treats half that much.
A year ago, the city’s economic development
committee, chaired by former state Rep. Patrick Rose, who runs a title
company based in Dripping Springs, declared in a letter to the mayor
that the lack of capacity undermines the city’s ability to meet the
needs of existing residents, manage new growth and to “recruit
additional, quality primary employers to our community.”
The city
then hired an engineering firm. Using what it says is a moderate
projection — an annual growth rate of 8 percent — the firm forecast in a
$94,000 report that the plant will reach 90 percent of its capacity by
2017, and that by 2023 it will have to treat 199,615 gallons per day.
The
city currently uses treated wastewater to irrigate city-owned land. The
engineering firm recommended expanding the plant to a capacity of
750,000 gallons per day. Treated wastewater could be sprayed on
city-owned playing fields and land at new subdivisions tying into the
plant, but the engineering firm recommended also seeking permission from
the state to discharge into Onion Creek. The direct discharge permit
would give the plant another option for handling cleaned-up sewer water
in case it outstrips the demand to irrigate neighboring lands.
City
Council member Bill Foulds said a centralized plant run by the city
will cut down the risk from Belterra-like plants scattered around the
Hill Country. Providing wastewater services to subdivisions in its
suburbs also gives the city some leverage in managing development, such
as requiring construction setbacks from area waterways. The new
developments would pay for the lion’s share of the plant expansion,
which will likely be more modest than the $28.6 million expansion
envisioned by the engineering firm, he said.
Under state standards, the effluent should be clean enough to fish or swim in.
Salt
Lick restaurant owner Scott Roberts, whose family has owned property
fronting Onion Creek since 1902, says he is not concerned about
potential treated sewage discharges upriver of him — as long as it is
treated properly.
“Right now I’m comfortable with the motivation
and intentions of Dripping Springs,” he said. “They’re not out there to
create a sea of concrete. They really are committed to making sure
development in their jurisdiction takes place conscientiously.”
Austin officials are monitoring the plant expansion prospects.
“It’s
great they’re looking forward to plan infrastructure to facilitate
growth,” said Chris Herrington, a city of Austin environmental engineer.
“But the question is, are they rushing to make decision that would be
controversial for a lot of people?”
If the Belterra scenario plays
itself out again, downstream cities, residents or environmental groups
could contest the discharge permit before it wins approval.
“There’s a huge potential for disastrous water-quality impacts,” Herrington said.