US Bridges

US 79 SB over FM 645

Good

Anderson County, Texas · US 79 at FM 645 · Structure no. 100010020507146

Built
2017
8 years old
Condition
Good
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
305 ft
3 main spans
Daily traffic
4,423
2023 count
Owner
State
State Highway Agency

About this bridge

US 79 SB over FM 645 is a prestressed concrete stringer/multi-beam or girder carrying US 79 SB over FM 645 in Anderson County, Texas. It was built in 2017, so it is 8 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,423 vehicles a day, roughly 25% of them trucks, projected to reach 15,500 by 2033. The structure is 305 ft (93 m) long and 40 ft wide.

CarriesUS 79 SB
CrossesFM 645
LocationUS 79 at FM 645
RouteU.S. Route 79
StateTexas
Coordinates31.68561, -95.7388
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length305 ft (93 m)
Longest span105 ft (32 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,423 (2023)
Projected traffic15,500 by 2033
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 79 SB over FM 645 built?

It was built in 2017, making it 8 years old in 2025.

What condition is US 79 SB over FM 645 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2022.

How much traffic does US 79 SB over FM 645 carry?

About 4,423 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is US 79 SB over FM 645?

The structure is 305 ft (93 m) long with a longest span of 105 ft (32 m) and a deck 40 ft wide.

Who owns US 79 SB over FM 645?

It is owned by the State Highway Agency.