US Bridges

Loop 378 over US 87 & US 277 NB

Fair

Tom Green County, Texas · 0.35 MI S of Loop 306 · Structure no. 072260007002055

Built
1972
53 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
400 ft
3 main spans
Daily traffic
8,080
2013 count
Owner
State
State Highway Agency

About this bridge

Loop 378 over US 87 & US 277 NB is a prestressed concrete stringer/multi-beam or girder carrying Loop 378 over US 87 & US 277 NB in Tom Green County, Texas. It was built in 1972, so it is 53 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 8,080 vehicles a day, roughly 10% of them trucks, projected to reach 11,310 by 2033. The structure is 400 ft (121.9 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLoop 378
CrossesUS 87 & US 277 NB
Location0.35 MI S of Loop 306
RouteState Highway 378
CountyTom Green County
StateTexas
Coordinates31.39763, -100.43509
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length400 ft (121.9 m)
Longest span94 ft (28.7 m)
Deck width50 ft (15.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,080 (2013)
Projected traffic11,310 by 2033
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Loop 378 over US 87 & US 277 NB built?

It was built in 1972, making it 53 years old in 2025.

What condition is Loop 378 over US 87 & US 277 NB 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 June 2024.

How much traffic does Loop 378 over US 87 & US 277 NB carry?

About 8,080 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is Loop 378 over US 87 & US 277 NB?

The structure is 400 ft (121.9 m) long with a longest span of 94 ft (28.7 m) and a deck 50 ft wide.

Who owns Loop 378 over US 87 & US 277 NB?

It is owned by the State Highway Agency.