US Bridges

Loop 13 over Drain

Good

Bexar County, Texas · 0.10 MI W of IH 37 · Structure no. 150150052101005

Built
1942
83 years old, rebuilt 1969
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
46 ft
8 main spans
Daily traffic
26,219
2020 count
Owner
State
State Highway Agency

About this bridge

Loop 13 over Drain is a concrete culvert carrying Loop 13 over Drain in Bexar County, Texas. It was built in 1942 and reconstructed in 1969, so it is 83 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 26,219 vehicles a day, roughly 7% of them trucks, projected to reach 34,480 by 2033. The structure is 46 ft (14 m) long and 102 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLoop 13
CrossesDrain
Location0.10 MI W of IH 37
RouteState Highway 13
StateTexas
Coordinates29.35207, -98.4307
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
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
DeckConcrete, cast-in-place
Main spans8
Design loadH 15
Structure length46 ft (14 m)
Longest span5 ft (1.5 m)
Deck width102 ft (31.2 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,219 (2020)
Projected traffic34,480 by 2033
Trucks7%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Loop 13 over Drain built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1969.

What condition is Loop 13 over Drain in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Loop 13 over Drain carry?

About 26,219 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Loop 13 over Drain?

The structure is 46 ft (14 m) long with a longest span of 5 ft (1.5 m) and a deck 102 ft wide.

Who owns Loop 13 over Drain?

It is owned by the State Highway Agency.