US Bridges

FM 1770 over Bluff Creek

Fair

Runnels County, Texas · 1.35 MI E of US 83 · Structure no. 072000173101001

Built
1955
70 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
200 ft
8 main spans
Daily traffic
307
2020 count
Owner
State
State Highway Agency

About this bridge

FM 1770 over Bluff Creek is a concrete slab carrying FM 1770 over Bluff Creek in Runnels County, Texas. It was built in 1955, so it is 70 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 307 vehicles a day, roughly 23% of them trucks, projected to reach 560 by 2033. The structure is 200 ft (61 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM 1770
CrossesBluff Creek
Location1.35 MI E of US 83
RouteState Highway 1770
CountyRunnels County
StateTexas
Coordinates31.96637, -99.93991
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
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 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 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 rating61 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadOther
Structure length200 ft (61 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic307 (2020)
Projected traffic560 by 2033
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1770 over Bluff Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is FM 1770 over Bluff 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 March 2024.

How much traffic does FM 1770 over Bluff Creek carry?

About 307 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is FM 1770 over Bluff Creek?

The structure is 200 ft (61 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns FM 1770 over Bluff Creek?

It is owned by the State Highway Agency.