US Bridges

US 77 Bus NB over SP 484 NB to Bus 77 SB

Fair

McLennan County, Texas · 1.5 MI SE of IH 35 · Structure no. 091610004901124

Built
1958
67 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
146 ft
3 main spans
Daily traffic
6,917
2020 count
Owner
State
State Highway Agency

About this bridge

US 77 Bus NB over SP 484 NB to Bus 77 SB is a steel continuous stringer/multi-beam or girder carrying US 77 Bus NB over SP 484 NB to Bus 77 SB in McLennan County, Texas. It was built in 1958, so it is 67 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 6,917 vehicles a day, roughly 13% of them trucks, projected to reach 13,790 by 2037. The structure is 146 ft (44.5 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesUS 77 Bus NB
CrossesSP 484 NB to Bus 77 SB
Location1.5 MI SE of IH 35
RouteState Highway 77
CountyMcLennan County
StateTexas
Coordinates31.56066, -97.10161
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span55 ft (16.8 m)
Deck width44 ft (13.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic6,917 (2020)
Projected traffic13,790 by 2037
Trucks13%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 77 Bus NB over SP 484 NB to Bus 77 SB built?

It was built in 1958, making it 67 years old in 2025.

What condition is US 77 Bus NB over SP 484 NB to Bus 77 SB 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 January 2023.

How much traffic does US 77 Bus NB over SP 484 NB to Bus 77 SB carry?

About 6,917 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is US 77 Bus NB over SP 484 NB to Bus 77 SB?

The structure is 146 ft (44.5 m) long with a longest span of 55 ft (16.8 m) and a deck 44 ft wide.

Who owns US 77 Bus NB over SP 484 NB to Bus 77 SB?

It is owned by the State Highway Agency.