US Bridges

FM 55 over Mill Creek

Fair

Navarro County, Texas · 1.05 MI NW of FM 2930 · Structure no. 181750145103005

Built
1962
63 years old, rebuilt 1998
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
186 ft
6 main spans
Daily traffic
1,078
2023 count
Owner
State
State Highway Agency

About this bridge

FM 55 over Mill Creek is a concrete stringer/multi-beam or girder carrying FM 55 over Mill Creek in Navarro County, Texas. It was built in 1962 and reconstructed in 1998, so it is 63 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 5 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 1,078 vehicles a day, roughly 7% of them trucks, projected to reach 1,100 by 2033. The structure is 186 ft (56.7 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFM 55
CrossesMill Creek
Location1.05 MI NW of FM 2930
RouteState Highway 55
CountyNavarro County
StateTexas
Coordinates32.14552, -96.74931
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length186 ft (56.7 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,078 (2023)
Projected traffic1,100 by 2033
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$55,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 55 over Mill Creek built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1998.

What condition is FM 55 over Mill 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 55 over Mill Creek carry?

About 1,078 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is FM 55 over Mill Creek?

The structure is 186 ft (56.7 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns FM 55 over Mill Creek?

It is owned by the State Highway Agency.