US Bridges

Lp 1604 over Drain

Fair

Bexar County, Texas · 1.35 MI NW of IH 35 · Structure no. 150150245203202

Built
1988
37 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
65 ft
3 main spans
Daily traffic
77,319
2020 count
Owner
State
State Highway Agency

About this bridge

Lp 1604 over Drain is a concrete culvert carrying Lp 1604 over Drain in Bexar County, Texas. It was built in 1988, so it is 37 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 77,319 vehicles a day, roughly 7% of them trucks, projected to reach 85,790 by 2033. The structure is 65 ft (19.8 m) long and 528 ft wide.

CarriesLp 1604
CrossesDrain
Location1.35 MI NW of IH 35
RouteState Highway 1604
StateTexas
Coordinates29.58442, -98.34685
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span10 ft (3 m)
Deck width528 ft (160.9 m)
Roadway width148 ft (45.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77,319 (2020)
Projected traffic85,790 by 2033
Trucks7%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lp 1604 over Drain built?

It was built in 1988, making it 37 years old in 2025.

What condition is Lp 1604 over Drain 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 May 2024.

How much traffic does Lp 1604 over Drain carry?

About 77,319 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Lp 1604 over Drain?

The structure is 65 ft (19.8 m) long with a longest span of 10 ft (3 m) and a deck 528 ft wide.

Who owns Lp 1604 over Drain?

It is owned by the State Highway Agency.