US Bridges

US 377 over SH 56 & UP RR

Fair

Grayson County, Texas · JCT of US 377 & SH 56 · Structure no. 010920008110088

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
350 ft
1 main span
Daily traffic
8,424
2020 count
Owner
State
State Highway Agency

About this bridge

US 377 over SH 56 & UP RR is a steel continuous stringer/multi-beam or girder carrying US 377 over SH 56 & UP RR in Grayson County, Texas. It was built in 1966, so it is 59 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 8,424 vehicles a day, roughly 16% of them trucks, projected to reach 9,680 by 2033. The structure is 350 ft (106.7 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 377
CrossesSH 56 & UP RR
LocationJCT of US 377 & SH 56
RouteU.S. Route 377
StateTexas
Coordinates33.6535, -96.89351
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 20
Structure length350 ft (106.7 m)
Longest span100 ft (30.5 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,424 (2020)
Projected traffic9,680 by 2033
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 377 over SH 56 & UP RR built?

It was built in 1966, making it 59 years old in 2025.

What condition is US 377 over SH 56 & UP RR 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 April 2023.

How much traffic does US 377 over SH 56 & UP RR carry?

About 8,424 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is US 377 over SH 56 & UP RR?

The structure is 350 ft (106.7 m) long with a longest span of 100 ft (30.5 m) and a deck 37 ft wide.

Who owns US 377 over SH 56 & UP RR?

It is owned by the State Highway Agency.