US Bridges

US 377 over South Llano River

Fair

Edwards County, Texas · 7.0 MI SW of Kimble C/L · Structure no. 070700014802004

Built
1948
77 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
100 ft
4 main spans
Daily traffic
189
2020 count
Owner
State
State Highway Agency

About this bridge

US 377 over South Llano River is a concrete slab carrying US 377 over South Llano River in Edwards County, Texas. It was built in 1948, so it is 77 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 189 vehicles a day, roughly 13% of them trucks, projected to reach 252 by 2038. The structure is 100 ft (30.5 m) long and 27 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesUS 377
CrossesSouth Llano River
Location7.0 MI SW of Kimble C/L
RouteU.S. Route 377
CountyEdwards County
StateTexas
Coordinates30.22588, -100.00631
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2020)
Projected traffic252 by 2038
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$6,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 377 over South Llano River built?

It was built in 1948, making it 77 years old in 2025.

What condition is US 377 over South Llano River 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 July 2024.

How much traffic does US 377 over South Llano River carry?

About 189 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is US 377 over South Llano River?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.

Who owns US 377 over South Llano River?

It is owned by the State Highway Agency.