US Bridges

18th Street over Wilson Branch

Fair

McLennan County, Texas · 3.0 MI S of FM 3051 · Structure no. 091610B06816001

Built
1954
71 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
11,089
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

18th Street over Wilson Branch is a concrete culvert carrying 18th Street over Wilson Branch in McLennan County, Texas. It was built in 1954, so it is 71 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 11,089 vehicles a day, roughly 11% of them trucks, projected to reach 16,680 by 2037. The structure is 26 ft (7.9 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries18th Street
CrossesWilson Branch
Location3.0 MI S of FM 3051
RouteCity Street 6816
CountyMcLennan County
StateTexas
Coordinates31.57453, -97.16764
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to 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 spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span9 ft (2.7 m)
Deck width75 ft (22.9 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,089 (2020)
Projected traffic16,680 by 2037
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$400,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 18th Street over Wilson Branch built?

It was built in 1954, making it 71 years old in 2025.

What condition is 18th Street over Wilson 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 April 2024.

How much traffic does 18th Street over Wilson Branch carry?

About 11,089 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is 18th Street over Wilson Branch?

The structure is 26 ft (7.9 m) long with a longest span of 9 ft (2.7 m) and a deck 75 ft wide.

Who owns 18th Street over Wilson Branch?

It is owned by the City or Municipal Highway Agency.