US Bridges

Sam Houston Ave over Mankins Br Trib

Good

Williamson County, Texas · 1.55 MI E of SE Inner Lp · Structure no. 142460D00535005

Built
2012
13 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
1,500
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Sam Houston Ave over Mankins Br Trib is a concrete culvert carrying Sam Houston Ave over Mankins Br Trib in Williamson County, Texas. It was built in 2012, so it is 13 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,500 vehicles a day, projected to reach 3,500 by 2040. The structure is 26 ft (7.9 m) long and 153 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSam Houston Ave
CrossesMankins Br Trib
Location1.55 MI E of SE Inner Lp
RouteCity Street 0
CountyWilliamson County
StateTexas
Coordinates30.61333, -97.63458
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span7 ft (2.1 m)
Deck width153 ft (46.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2020)
Projected traffic3,500 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sam Houston Ave over Mankins Br Trib built?

It was built in 2012, making it 13 years old in 2025.

What condition is Sam Houston Ave over Mankins Br Trib in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does Sam Houston Ave over Mankins Br Trib carry?

About 1,500 vehicles per day (2020 count).

How long is Sam Houston Ave over Mankins Br Trib?

The structure is 26 ft (7.9 m) long with a longest span of 7 ft (2.1 m) and a deck 153 ft wide.

Who owns Sam Houston Ave over Mankins Br Trib?

It is owned by the City or Municipal Highway Agency.