US Bridges

US 259 SB over Alligator Lake Slough

Fair

Upshur County, Texas · 4.40 MI N of SH 155 · Structure no. 192300039202026

Built
1957
68 years old, rebuilt 1996
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
200 ft
10 main spans
Daily traffic
2,624
2020 count
Owner
State
State Highway Agency

About this bridge

US 259 SB over Alligator Lake Slough is a concrete slab carrying US 259 SB over Alligator Lake Slough in Upshur County, Texas. It was built in 1957 and reconstructed in 1996, so it is 68 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 2,624 vehicles a day, roughly 14% of them trucks, projected to reach 6,580 by 2031. The structure is 200 ft (61 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 259 SB
CrossesAlligator Lake Slough
Location4.40 MI N of SH 155
RouteU.S. Route 259
CountyUpshur County
StateTexas
Coordinates32.90207, -94.72739
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadH 15
Structure length200 ft (61 m)
Longest span20 ft (6.1 m)
Deck width38 ft (11.6 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,624 (2020)
Projected traffic6,580 by 2031
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate 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 259 SB over Alligator Lake Slough built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1996.

What condition is US 259 SB over Alligator Lake 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 July 2023.

How much traffic does US 259 SB over Alligator Lake Slough carry?

About 2,624 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is US 259 SB over Alligator Lake Slough?

The structure is 200 ft (61 m) long with a longest span of 20 ft (6.1 m) and a deck 38 ft wide.

Who owns US 259 SB over Alligator Lake Slough?

It is owned by the State Highway Agency.