US Bridges

CR 121 over Mileham Branch

Fair

Williamson County, Texas · 1.7 MI NE of SH 29 · Structure no. 142460AA0269001

Built
2005
20 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
25 ft
3 main spans
Daily traffic
78
2020 count
Owner
County
County Highway Agency

About this bridge

CR 121 over Mileham Branch is a concrete culvert carrying CR 121 over Mileham Branch in Williamson County, Texas. It was built in 2005, so it is 20 years old, younger 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 78 vehicles a day, projected to reach 200 by 2030. The structure is 25 ft (7.6 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCR 121
CrossesMileham Branch
Location1.7 MI NE of SH 29
RouteCounty Highway 121
CountyWilliamson County
StateTexas
Coordinates30.65867, -97.56119
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78 (2020)
Projected traffic200 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR 121 over Mileham Branch built?

It was built in 2005, making it 20 years old in 2025.

What condition is CR 121 over Mileham 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 October 2023.

How much traffic does CR 121 over Mileham Branch carry?

About 78 vehicles per day (2020 count).

How long is CR 121 over Mileham Branch?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m) and a deck 32 ft wide.

Who owns CR 121 over Mileham Branch?

It is owned by the County Highway Agency.