US Bridges

SH 123 over Big Cottonwood Creek

PoorPosted for load

Hays County, Texas · 2.1 MI S of IH 35 · Structure no. 141060036601002

Built
1929
96 years old, rebuilt 1962
Condition
Poor
inspected September 2024
Type
Tee Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
24,909
2023 count
Owner
State
State Highway Agency

About this bridge

SH 123 over Big Cottonwood Creek is a concrete tee beam carrying SH 123 over Big Cottonwood Creek in Hays County, Texas. It was built in 1929 and reconstructed in 1962, so it is 96 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 24,909 vehicles a day, roughly 10% of them trucks, projected to reach 34,873 by 2042. The structure is 86 ft (26.2 m) long and 49 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSH 123
CrossesBig Cottonwood Creek
Location2.1 MI S of IH 35
RouteState Highway 123
StateTexas
Coordinates29.83664, -97.94156
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length86 ft (26.2 m)
Longest span29 ft (8.8 m)
Deck width49 ft (14.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,909 (2023)
Projected traffic34,873 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 123 over Big Cottonwood Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1962.

What condition is SH 123 over Big Cottonwood Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does SH 123 over Big Cottonwood Creek carry?

About 24,909 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SH 123 over Big Cottonwood Creek?

The structure is 86 ft (26.2 m) long with a longest span of 29 ft (8.8 m) and a deck 49 ft wide.

Who owns SH 123 over Big Cottonwood Creek?

It is owned by the State Highway Agency.