US Bridges

IH 20 EB over FM 670

Fair

Mitchell County, Texas · 0.55 MI W of FM 670(N) · Structure no. 081680000507045

Built
1957
68 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
114 ft
3 main spans
Daily traffic
10,775
2019 count
Owner
State
State Highway Agency

About this bridge

IH 20 EB over FM 670 is a concrete continuous slab carrying IH 20 EB over FM 670 in Mitchell County, Texas. It was built in 1957, so it is 68 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 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 10,775 vehicles a day, roughly 37% of them trucks, projected to reach 8,750 by 2033. The structure is 114 ft (34.7 m) long and 40 ft wide.

Location

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CarriesIH 20 EB
CrossesFM 670
Location0.55 MI W of FM 670(N)
RouteInterstate 20
CountyMitchell County
StateTexas
Coordinates32.35149, -101.02221
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span45 ft (13.7 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,775 (2019)
Projected traffic8,750 by 2033
Trucks37%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 20 EB over FM 670 built?

It was built in 1957, making it 68 years old in 2025.

What condition is IH 20 EB over FM 670 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 May 2023.

How much traffic does IH 20 EB over FM 670 carry?

About 10,775 vehicles per day (2019 count), of which roughly 37% are trucks.

How long is IH 20 EB over FM 670?

The structure is 114 ft (34.7 m) long with a longest span of 45 ft (13.7 m) and a deck 40 ft wide.

Who owns IH 20 EB over FM 670?

It is owned by the State Highway Agency.