US Bridges

US 87 SB Ml over Loop 306

Fair

Tom Green County, Texas · At Loop 306 · Structure no. 072260007002070

Built
1972
53 years old
Condition
Fair
inspected June 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
2 main spans
Daily traffic
3,610
2013 count
Owner
State
State Highway Agency

About this bridge

US 87 SB Ml over Loop 306 is a prestressed concrete stringer/multi-beam or girder carrying US 87 SB Ml over Loop 306 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 3,610 vehicles a day, roughly 15% of them trucks, projected to reach 5,060 by 2033. The structure is 280 ft (85.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 87 SB Ml
CrossesLoop 306
LocationAt Loop 306
RouteU.S. Route 87
StateTexas
Coordinates31.38707, -100.37386
Functional classUrban Other Principal 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span80 ft (24.4 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,610 (2013)
Projected traffic5,060 by 2033
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 87 SB Ml over Loop 306 built?

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

What condition is US 87 SB Ml over Loop 306 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 2022.

How much traffic does US 87 SB Ml over Loop 306 carry?

About 3,610 vehicles per day (2013 count), of which roughly 15% are trucks.

How long is US 87 SB Ml over Loop 306?

The structure is 280 ft (85.3 m) long with a longest span of 80 ft (24.4 m) and a deck 44 ft wide.

Who owns US 87 SB Ml over Loop 306?

It is owned by the State Highway Agency.