US Bridges

CR101(L Blanco Rd) over Jonas Creek

Fair

Blanco County, Texas · 0.60 MI W of US 281 · Structure no. 140160AA0151001

Built
1923
102 years old, rebuilt 1960
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
140
2020 count
Owner
County
County Highway Agency

About this bridge

CR101(L Blanco Rd) over Jonas Creek is a concrete culvert carrying CR101(L Blanco Rd) over Jonas Creek in Blanco County, Texas. It was built in 1923 and reconstructed in 1960, so it is 102 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 140 vehicles a day, roughly 3% of them trucks, projected to reach 112 by 2042. The structure is 24 ft (7.3 m) long and 17 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesCR101(L Blanco Rd)
CrossesJonas Creek
Location0.60 MI W of US 281
RouteCounty Highway 101
CountyBlanco County
StateTexas
Coordinates30.00077, -98.41549
Functional classRural Local

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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span9 ft (2.7 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2020)
Projected traffic112 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR101(L Blanco Rd) over Jonas Creek built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1960.

What condition is CR101(L Blanco Rd) over Jonas Creek 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 2024.

How much traffic does CR101(L Blanco Rd) over Jonas Creek carry?

About 140 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is CR101(L Blanco Rd) over Jonas Creek?

The structure is 24 ft (7.3 m) long with a longest span of 9 ft (2.7 m) and a deck 17 ft wide.

Who owns CR101(L Blanco Rd) over Jonas Creek?

It is owned by the County Highway Agency.