US Bridges

US 79 SB over UP Rr; Drainage Ditch

Fair

Williamson County, Texas · 0.10 MI E of SH 95 · Structure no. 142460032004070

Built
1972
53 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
1 main span
Daily traffic
6,639
2023 count
Owner
State
State Highway Agency

About this bridge

US 79 SB over UP Rr; Drainage Ditch is a prestressed concrete stringer/multi-beam or girder carrying US 79 SB over UP Rr; Drainage Ditch in Williamson County, Texas. It was built in 1972, so it is 53 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 5 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 6,639 vehicles a day, roughly 25% of them trucks, projected to reach 8,379 by 2039. The structure is 250 ft (76.2 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 79 SB
CrossesUP Rr; Drainage Ditch
Location0.10 MI E of SH 95
RouteU.S. Route 79
CountyWilliamson County
StateTexas
Coordinates30.55537, -97.40644
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span100 ft (30.5 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,639 (2023)
Projected traffic8,379 by 2039
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 79 SB over UP Rr; Drainage Ditch built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 79 SB over UP Rr; Drainage Ditch 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 March 2023.

How much traffic does US 79 SB over UP Rr; Drainage Ditch carry?

About 6,639 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is US 79 SB over UP Rr; Drainage Ditch?

The structure is 250 ft (76.2 m) long with a longest span of 100 ft (30.5 m) and a deck 44 ft wide.

Who owns US 79 SB over UP Rr; Drainage Ditch?

It is owned by the State Highway Agency.