US Bridges

FM 105 over Adams Slough

Fair

Jasper County, Texas · 0.80 MI N of FM 2802 · Structure no. 201220071001010

Built
1964
61 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
100 ft
4 main spans
Daily traffic
4,352
2022 count
Owner
State
State Highway Agency

About this bridge

FM 105 over Adams Slough is a concrete continuous slab carrying FM 105 over Adams Slough in Jasper County, Texas. It was built in 1964, so it is 61 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 4,352 vehicles a day, roughly 4% of them trucks, projected to reach 4,660 by 2033. The structure is 100 ft (30.5 m) long and 45 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFM 105
CrossesAdams Slough
Location0.80 MI N of FM 2802
RouteState Highway 105
StateTexas
Coordinates30.24402, -94.0222
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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width45 ft (13.8 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,352 (2022)
Projected traffic4,660 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 105 over Adams Slough built?

It was built in 1964, making it 61 years old in 2025.

What condition is FM 105 over Adams 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 March 2024.

How much traffic does FM 105 over Adams Slough carry?

About 4,352 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is FM 105 over Adams Slough?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 45 ft wide.

Who owns FM 105 over Adams Slough?

It is owned by the State Highway Agency.