US Bridges

FM 635 over Alligator Creek

Fair

Navarro County, Texas · 0.40 MI E of SH 309 · Structure no. 181750184701001

Built
1948
77 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
27 ft
4 main spans
Daily traffic
195
2023 count
Owner
State
State Highway Agency

About this bridge

FM 635 over Alligator Creek is a concrete culvert carrying FM 635 over Alligator Creek in Navarro County, Texas. It was built in 1948, so it is 77 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 195 vehicles a day, roughly 21% of them trucks, projected to reach 210 by 2033. The structure is 27 ft (8.2 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM 635
CrossesAlligator Creek
Location0.40 MI E of SH 309
RouteState Highway 635
CountyNavarro County
StateTexas
Coordinates32.03899, -96.16237
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic195 (2023)
Projected traffic210 by 2033
Trucks21%
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 635 over Alligator Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is FM 635 over Alligator 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 November 2023.

How much traffic does FM 635 over Alligator Creek carry?

About 195 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is FM 635 over Alligator Creek?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m) and a deck 27 ft wide.

Who owns FM 635 over Alligator Creek?

It is owned by the State Highway Agency.