US Bridges

FM 1129 over Blackberry Creek

Fair

Navarro County, Texas · 1.55 MI N of FM 636 · Structure no. 181750071902004

Built
1951
74 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
60 ft
4 main spans
Daily traffic
961
2023 count
Owner
State
State Highway Agency

About this bridge

FM 1129 over Blackberry Creek is a concrete slab carrying FM 1129 over Blackberry Creek in Navarro County, Texas. It was built in 1951, so it is 74 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 961 vehicles a day, roughly 4% of them trucks, projected to reach 680 by 2033. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFM 1129
CrossesBlackberry Creek
Location1.55 MI N of FM 636
RouteState Highway 1129
CountyNavarro County
StateTexas
Coordinates32.23165, -96.38059
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
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length60 ft (18.3 m)
Longest span15 ft (4.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic961 (2023)
Projected traffic680 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 1129 over Blackberry Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is FM 1129 over Blackberry Creek 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 2024.

How much traffic does FM 1129 over Blackberry Creek carry?

About 961 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is FM 1129 over Blackberry Creek?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 25 ft wide.

Who owns FM 1129 over Blackberry Creek?

It is owned by the State Highway Agency.