US Bridges

Bi 20 over Spring Branch

Fair

Callahan County, Texas · 0.08 MI S of IH 20 · Structure no. 080300000712128

Built
1965
60 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
74 ft
6 main spans
Daily traffic
1,640
2013 count
Owner
State
State Highway Agency

About this bridge

Bi 20 over Spring Branch is a concrete culvert carrying Bi 20 over Spring Branch in Callahan County, Texas. It was built in 1965, so it is 60 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 1,640 vehicles a day, roughly 14% of them trucks, projected to reach 2,290 by 2033. The structure is 74 ft (22.6 m) long and 51 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBi 20
CrossesSpring Branch
Location0.08 MI S of IH 20
RouteState Highway 20
CountyCallahan County
StateTexas
Coordinates32.40191, -99.41358
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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
DeckConcrete, cast-in-place
Main spans6
Design loadOther
Structure length74 ft (22.6 m)
Longest span10 ft (3 m)
Deck width51 ft (15.6 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,640 (2013)
Projected traffic2,290 by 2033
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Bi 20 over Spring Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is Bi 20 over Spring Branch 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 February 2023.

How much traffic does Bi 20 over Spring Branch carry?

About 1,640 vehicles per day (2013 count), of which roughly 14% are trucks.

How long is Bi 20 over Spring Branch?

The structure is 74 ft (22.6 m) long with a longest span of 10 ft (3 m) and a deck 51 ft wide.

Who owns Bi 20 over Spring Branch?

It is owned by the State Highway Agency.