US Bridges

FM 99 over Olmos Creek Tributary

Fair

Atascosa County, Texas · 1.00 MI SW of FM 1099 · Structure no. 150070034807025

Built
1965
60 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
1,247
2019 count
Owner
State
State Highway Agency

About this bridge

FM 99 over Olmos Creek Tributary is a concrete culvert carrying FM 99 over Olmos Creek Tributary in Atascosa County, Texas. It was built in 1965, so it is 60 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,247 vehicles a day, roughly 23% of them trucks, projected to reach 2,250 by 2033. The structure is 26 ft (7.9 m) long and 35 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFM 99
CrossesOlmos Creek Tributary
Location1.00 MI SW of FM 1099
RouteState Highway 99
CountyAtascosa County
StateTexas
Coordinates28.71956, -98.20455
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span8 ft (2.4 m)
Deck width35 ft (10.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,247 (2019)
Projected traffic2,250 by 2033
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 99 over Olmos Creek Tributary built?

It was built in 1965, making it 60 years old in 2025.

What condition is FM 99 over Olmos Creek Tributary in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does FM 99 over Olmos Creek Tributary carry?

About 1,247 vehicles per day (2019 count), of which roughly 23% are trucks.

How long is FM 99 over Olmos Creek Tributary?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m) and a deck 35 ft wide.

Who owns FM 99 over Olmos Creek Tributary?

It is owned by the State Highway Agency.