FM 977 over IH 45

Fair

Leon County, Texas · 0.9 MI W of SH 75 · Structure no. 171450067504095

Built: 1965; 60 years old
Condition: Fair; inspected March 2023
Type: Tee Beam; Concrete Continuous
Length: 232 ft; 4 main spans
Daily traffic: 610; 2013 count
Owner: State; State Highway Agency

About this bridge

FM 977 over IH 45 is a concrete continuous tee beam carrying FM 977 over IH 45 in Leon County, Texas. It was built in 1965, so it is 60 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 610 vehicles a day, roughly 13% of them trucks, projected to reach 860 by 2033. The structure is 232 ft (70.7 m) long and 32 ft wide.

Location

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CarriesFM 977

CrossesIH 45

Location0.9 MI W of SH 75

RouteState Highway 977

CountyLeon County

StateTexas

Coordinates31.14973, -95.98357

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.

Last inspectionMarch 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation6: Equal to present minimum criteria

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Approach roadway alignment8: Equal to present desirable criteria

Operating rating52 US tons

Inventory rating31 US tons

Structure

Structure typeTee Beam

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadH 20

Structure length232 ft (70.7 m)

Longest span65 ft (19.8 m)

Deck width32 ft (9.9 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic610 (2013)

Projected traffic860 by 2033

Trucks13%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesHighway

Detour if closed—

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—

NavigationNot applicable (no waterway)

Frequently asked questions

When was FM 977 over IH 45 built?

It was built in 1965, making it 60 years old in 2025.

What condition is FM 977 over IH 45 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 2023.

How much traffic does FM 977 over IH 45 carry?

About 610 vehicles per day (2013 count), of which roughly 13% are trucks.

How long is FM 977 over IH 45?

The structure is 232 ft (70.7 m) long with a longest span of 65 ft (19.8 m) and a deck 32 ft wide.

Who owns FM 977 over IH 45?

It is owned by the State Highway Agency.