US Bridges

Simonsville Road over Llano River

Fair

Mason County, Texas · 4.90 MI NW of FM 733 · Structure no. 141570AA0191001

Built
1936
89 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
220 ft
13 main spans
Daily traffic
52
2020 count
Owner
County
County Highway Agency

About this bridge

Simonsville Road over Llano River is a concrete culvert carrying Simonsville Road over Llano River in Mason County, Texas. It was built in 1936, so it is 89 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 52 vehicles a day, roughly 3% of them trucks, projected to reach 42 by 2042. The structure is 220 ft (67.1 m) long and 14 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSimonsville Road
CrossesLlano River
Location4.90 MI NW of FM 733
RouteCounty Highway 191
CountyMason County
StateTexas
Coordinates30.64009, -99.16819
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 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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans13
Design loadUnknown
Structure length220 ft (67.1 m)
Longest span8 ft (2.4 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2020)
Projected traffic42 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$80,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Simonsville Road over Llano River built?

It was built in 1936, making it 89 years old in 2025.

What condition is Simonsville Road over 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 February 2024.

How much traffic does Simonsville Road over Llano River carry?

About 52 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Simonsville Road over Llano River?

The structure is 220 ft (67.1 m) long with a longest span of 8 ft (2.4 m) and a deck 14 ft wide.

Who owns Simonsville Road over Llano River?

It is owned by the County Highway Agency.