US Bridges

RM 12 over Leath Branch

Fair

Hays County, Texas · 16.5 MI S of US 290 · Structure no. 141060028503002

Built
1935
90 years old, rebuilt 1964
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
43 ft
3 main spans
Daily traffic
7,639
2020 count
Owner
State
State Highway Agency

About this bridge

RM 12 over Leath Branch is a concrete culvert carrying RM 12 over Leath Branch in Hays County, Texas. It was built in 1935 and reconstructed in 1964, so it is 90 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 7,639 vehicles a day, roughly 5% of them trucks, projected to reach 13,830 by 2033. The structure is 43 ft (13.1 m) long and 50 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesRM 12
CrossesLeath Branch
Location16.5 MI S of US 290
RouteState Highway 12
CountyHays County
StateTexas
Coordinates29.97768, -98.09346
Functional classUrban Minor Arterial

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 inspectionSeptember 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 alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span9 ft (2.7 m)
Deck width50 ft (15.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,639 (2020)
Projected traffic13,830 by 2033
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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$4,000
NavigationNo navigation control on waterway

Frequently asked questions

When was RM 12 over Leath Branch built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1964.

What condition is RM 12 over Leath 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 September 2024.

How much traffic does RM 12 over Leath Branch carry?

About 7,639 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is RM 12 over Leath Branch?

The structure is 43 ft (13.1 m) long with a longest span of 9 ft (2.7 m) and a deck 50 ft wide.

Who owns RM 12 over Leath Branch?

It is owned by the State Highway Agency.