US Bridges

FM 311 over Miller Creek

Good

Comal County, Texas · 2.80 MI SE of US 281 · Structure no. 150460154101006

Built
2007
18 years old
Condition
Good
inspected June 2024
Type
Other
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
2,241
2020 count
Owner
State
State Highway Agency

About this bridge

FM 311 over Miller Creek is a prestressed concrete other carrying FM 311 over Miller Creek in Comal County, Texas. It was built in 2007, so it is 18 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 2,241 vehicles a day, roughly 2% of them trucks, projected to reach 2,930 by 2033. The structure is 100 ft (30.5 m) long and 34 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesFM 311
CrossesMiller Creek
Location2.80 MI SE of US 281
RouteState Highway 311
StateTexas
Coordinates29.85307, -98.37266
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeOther
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length100 ft (30.5 m)
Longest span40 ft (12.2 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,241 (2020)
Projected traffic2,930 by 2033
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 FM 311 over Miller Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is FM 311 over Miller Creek 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 June 2024.

How much traffic does FM 311 over Miller Creek carry?

About 2,241 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is FM 311 over Miller Creek?

The structure is 100 ft (30.5 m) long with a longest span of 40 ft (12.2 m) and a deck 34 ft wide.

Who owns FM 311 over Miller Creek?

It is owned by the State Highway Agency.