US Bridges

Lp 1604 over US 181

Fair

Bexar County, Texas · US 181 @ Loop 1604 · Structure no. 150150010002107

Built
1981
44 years old
Condition
Fair
inspected August 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
2 main spans
Daily traffic
6,029
2016 count
Owner
State
State Highway Agency

About this bridge

Lp 1604 over US 181 is a prestressed concrete stringer/multi-beam or girder carrying Lp 1604 over US 181 in Bexar County, Texas. It was built in 1981, so it is 44 years old, younger 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 6,029 vehicles a day, roughly 7% of them trucks, projected to reach 10,130 by 2036. The structure is 280 ft (85.3 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesLp 1604
CrossesUS 181
LocationUS 181 @ Loop 1604
RouteState Highway 1604
CountyBexar County
StateTexas
Coordinates29.26735, -98.30626
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span100 ft (30.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,029 (2016)
Projected traffic10,130 by 2036
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Lp 1604 over US 181 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Lp 1604 over US 181 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 August 2022.

How much traffic does Lp 1604 over US 181 carry?

About 6,029 vehicles per day (2016 count), of which roughly 7% are trucks.

How long is Lp 1604 over US 181?

The structure is 280 ft (85.3 m) long with a longest span of 100 ft (30.5 m) and a deck 42 ft wide.

Who owns Lp 1604 over US 181?

It is owned by the State Highway Agency.