US Bridges

FM 866 over IH 20

Fair

Ector County, Texas · 3.95 MI E of US 385 · Structure no. 060690000407072

Built
1970
55 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
260 ft
2 main spans
Daily traffic
3,682
2021 count
Owner
State
State Highway Agency

About this bridge

FM 866 over IH 20 is a prestressed concrete stringer/multi-beam or girder carrying FM 866 over IH 20 in Ector County, Texas. It was built in 1970, so it is 55 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 3,682 vehicles a day, roughly 58% of them trucks, projected to reach 5,155 by 2041. The structure is 260 ft (79.2 m) long and 50 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFM 866
CrossesIH 20
Location3.95 MI E of US 385
RouteState Highway 866
CountyEctor County
StateTexas
Coordinates31.76078, -102.53964
Functional classUrban Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span90 ft (27.4 m)
Deck width50 ft (15.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,682 (2021)
Projected traffic5,155 by 2041
Trucks58%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FM 866 over IH 20 built?

It was built in 1970, making it 55 years old in 2025.

What condition is FM 866 over IH 20 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 FM 866 over IH 20 carry?

About 3,682 vehicles per day (2021 count), of which roughly 58% are trucks.

How long is FM 866 over IH 20?

The structure is 260 ft (79.2 m) long with a longest span of 90 ft (27.4 m) and a deck 50 ft wide.

Who owns FM 866 over IH 20?

It is owned by the State Highway Agency.