US Bridges

County Line RD over Mitchell Branch

Fair

La Salle County, Texas · 3.60 MI S of Frio C/L · Structure no. 221420AA0005001

Built
1950
75 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
30
2010 count
Owner
County
County Highway Agency

About this bridge

County Line RD over Mitchell Branch is a concrete slab carrying County Line RD over Mitchell Branch in La Salle County, Texas. It was built in 1950, so it is 75 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 30 vehicles a day, projected to reach 300 by 2027. The structure is 60 ft (18.3 m) long and 15 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Line RD
CrossesMitchell Branch
Location3.60 MI S of Frio C/L
RouteCounty Highway 5
CountyLa Salle County
StateTexas
Coordinates28.61824, -99.25313
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2010)
Projected traffic300 by 2027
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Line RD over Mitchell Branch built?

It was built in 1950, making it 75 years old in 2025.

What condition is County Line RD over Mitchell 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 November 2023.

How much traffic does County Line RD over Mitchell Branch carry?

About 30 vehicles per day (2010 count).

How long is County Line RD over Mitchell Branch?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 15 ft wide.

Who owns County Line RD over Mitchell Branch?

It is owned by the County Highway Agency.