US Bridges

US 59 NB over Bosque Slough

Fair

Wharton County, Texas · 1.70 MI SW of FM 961 · Structure no. 132410008907030

Built
1928
97 years old, rebuilt 1948
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
40 ft
2 main spans
Daily traffic
18,108
2024 count
Owner
State
State Highway Agency

About this bridge

US 59 NB over Bosque Slough is a concrete slab carrying US 59 NB over Bosque Slough in Wharton County, Texas. It was built in 1928 and reconstructed in 1948, so it is 97 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 18,108 vehicles a day, roughly 12% of them trucks, projected to reach 19,158 by 2041. The structure is 40 ft (12.2 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 59 NB
CrossesBosque Slough
Location1.70 MI SW of FM 961
RouteU.S. Route 59
CountyWharton County
StateTexas
Coordinates29.26621, -96.15579
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span20 ft (6.1 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,108 (2024)
Projected traffic19,158 by 2041
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 59 NB over Bosque Slough built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1948.

What condition is US 59 NB over Bosque Slough 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 January 2023.

How much traffic does US 59 NB over Bosque Slough carry?

About 18,108 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is US 59 NB over Bosque Slough?

The structure is 40 ft (12.2 m) long with a longest span of 20 ft (6.1 m) and a deck 41 ft wide.

Who owns US 59 NB over Bosque Slough?

It is owned by the State Highway Agency.