US Bridges

FM 1670 over Trib Lampasas River

Good

Bell County, Texas · 3.25 MI N of FM 2484 · Structure no. 090140156501005

Built
1968
57 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
28 ft
5 main spans
Daily traffic
2,555
2018 count
Owner
State
State Highway Agency

About this bridge

FM 1670 over Trib Lampasas River is a concrete culvert carrying FM 1670 over Trib Lampasas River in Bell County, Texas. It was built in 1968, so it is 57 years old, older 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 2,555 vehicles a day, roughly 8% of them trucks, projected to reach 3,350 by 2033. The structure is 28 ft (8.5 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFM 1670
CrossesTrib Lampasas River
Location3.25 MI N of FM 2484
RouteState Highway 1670
StateTexas
Coordinates31.01394, -97.53554
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span5 ft (1.5 m)
Deck width43 ft (13.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,555 (2018)
Projected traffic3,350 by 2033
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$261,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 1670 over Trib Lampasas River built?

It was built in 1968, making it 57 years old in 2025.

What condition is FM 1670 over Trib Lampasas River 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 April 2023.

How much traffic does FM 1670 over Trib Lampasas River carry?

About 2,555 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is FM 1670 over Trib Lampasas River?

The structure is 28 ft (8.5 m) long with a longest span of 5 ft (1.5 m) and a deck 43 ft wide.

Who owns FM 1670 over Trib Lampasas River?

It is owned by the State Highway Agency.