US Bridges

Spur 484 SB over US 77 Bus NB

Fair

McLennan County, Texas · 1.5 MI SE of IH 35 · Structure no. 091610004901141

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

About this bridge

Spur 484 SB over US 77 Bus NB is a steel continuous stringer/multi-beam or girder carrying Spur 484 SB over US 77 Bus NB 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 4% of them trucks, projected to reach 15,480 by 2037. The structure is 282 ft (86 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesSpur 484 SB
CrossesUS 77 Bus NB
Location1.5 MI SE of IH 35
RouteState Highway 484
CountyMcLennan County
StateTexas
Coordinates31.56084, -97.10169
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length282 ft (86 m)
Longest span112 ft (34.1 m)
Deck width40 ft (12.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,917 (2020)
Projected traffic15,480 by 2037
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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$2.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Spur 484 SB over US 77 Bus NB built?

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

What condition is Spur 484 SB over US 77 Bus 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 January 2023.

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

About 6,917 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Spur 484 SB over US 77 Bus NB?

The structure is 282 ft (86 m) long with a longest span of 112 ft (34.1 m) and a deck 40 ft wide.

Who owns Spur 484 SB over US 77 Bus NB?

It is owned by the State Highway Agency.