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San Antonio airport lands $40.3M federal grant to rebuild drainage lines

San Antonio airport lands $40.3M federal grant to rebuild drainage lines

Built World San Antonio, TX local

Record $43.25M FAA package includes $40.97M for Phase 2 stormwater reconstruction at San Antonio airport

September 25th, 2026: FAA announces record $43.25M in grants for San Antonio airport

Overview

Updated Oct 14

San Antonio International Airport's underground storm drains have outlived their usefulness. The Federal Aviation Administration on Sept. 25 announced a record $43.25 million in grants to the airport, including $40.97 million to rebuild the drains.

The money covers part of Phase 2, which builds Stormline S in full and part of Stormline M. The project is under contract. It includes a new underground stormwater system that will carry water from the airfield and new terminal area to Salado Creek. Officials say it will cut standing water, reduce bird-strike risk, and protect operations in heavy rain.

Why it matters

Old storm drains at San Antonio's airport risk closing runways in heavy rain; this grant funds their replacement.

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Key Indicators

$40.97M
FAA grant obligation
Obligated Sept 24, 2026 for Phase 2 drainage reconstruction at San Antonio International Airport.
$13.7M
Approximate non-federal match
Roughly 25% of the project's eligible costs, based on the updated grant amount.
Phase 2
Construction phase
Builds Stormline S in full and Stormline M in part.

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People Involved

Ron Nirenberg
Ron Nirenberg
Mayor of San Antonio
In office; continues to advocate for federal infrastructure funding for San Antonio
JS
Jesus Saenz
Director of Airports, City of San Antonio Aviation Department
Overseeing the airport's redevelopment and drainage project
 Erik Walsh
Erik Walsh
City Manager of San Antonio
In office; has championed federal infrastructure investment for the city

Organizations Involved

City of San Antonio
City of San Antonio
Municipal government
Grant recipient; owns and operates San Antonio International Airport

The municipal government that owns San Antonio International Airport and applied for the FAA grant.
Federal Aviation Administration (FAA)
Federal Aviation Administration (FAA)
Federal Agency
Grantor; oversees airport grants through its Texas Airports Division Office

The U.S. agency that regulates civil aviation and distributes airport infrastructure grants.
San Antonio International Airport
San Antonio International Airport
Airport
Site of the drainage reconstruction project

San Antonio's main commercial airport and the place of performance for the drainage project.

Timeline

2 events Latest: September 25th, 2026 · 2 months ago

  1. FAA announces record $43.25M in grants for San Antonio airport

    Latest Funding

    FAA announces two AIP grants totaling $43.25M — the largest single AIP award in the airport's history — including $40.97M for airfield drainage reconstruction and erosion control. The drainage project is already under contract.

  2. FAA obligates $40.3M for airport drainage rebuild

    Funding

    The Federal Aviation Administration records a $40.3 million grant to the City of San Antonio for Phase 2 of airfield drainage reconstruction at the airport.

Scenarios

1

Airport completes drainage rebuild on schedule

Possible Resolves by End of 2028

Discussed by: No public analysis yet; the grant is new and no construction timeline has been set

The city and FAA move the project through design and construction. Stormlines S and M enter service, keeping runways open in heavy rain. Completion within two to three years would match typical FAA-funded drainage projects of this scale.

2

Airport drainage project hits delays or cost overruns

Possible Resolves by End of 2027

Discussed by: Not publicly predicted; buried drainage conditions are a known risk in construction

Weather, contractor shortages, or unexpected underground conditions push back construction. The city would ask for a schedule extension or more money, a common pattern in drainage work where buried conditions are hard to predict.

3

Federal budget cuts trim airport grant

Unlikely Resolves by Q3 2027

Discussed by: A tail risk not publicly discussed; depends on congressional budget action

Congress rescinds unobligated funds or the FAA deobligates the award if conditions aren't met. USAspending.gov would show the obligation reduced below $40.3 million. Such cuts are rare for already-obligated airport grants.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

October 2012

Hurricane Sandy airport shutdowns (2012)

Superstorm Sandy's storm surge flooded low-lying areas around New York Harbor. Water covered runways and taxiways at LaGuardia and Newark airports, forcing days-long closures and canceling thousands of flights.

Then

The Port Authority suspended operations and spent months repairing electrical and drainage systems before full service resumed.

Now

New York-area airports added flood barriers, raised vulnerable equipment, and hardened infrastructure. The event pushed U.S. airports to treat water-related resilience as a priority.

Why this matters now

San Antonio's grant targets the same vulnerability: drainage that fails in heavy rain can shut down an airport. Federal funding now treats drainage reconstruction as a resilience investment.

April 2024

Dubai airport floods (2024)

Record rainfall hit Dubai in one day, overwhelming the city's stormwater system. Water pooled on Dubai International Airport's aprons and taxiways, grounding planes and halting arrivals for days.

Then

Dubai International, a major global hub, diverted flights and pumped water from the airfield before operations slowly resumed.

Now

The airport and UAE authorities studied drainage upgrades and added flood mitigation as part of a broader infrastructure review.

Why this matters now

Like San Antonio's aging pipes, Dubai's stormwater system was overwhelmed by water and shut down the airport. The episode shows how a single drainage failure can disrupt a major hub.

Sources

(8)
+2
USAspending.gov HigherGov San Antonio Report Transportation Today Federal Aviation Administration My Neighborhood News LinkedIn (San Antonio International Airport) San Antonio Business Journal