US Bridges

FM 1788 over Bi 20 FM 662 and UP RR

Fair

Midland County, Texas · 5.32 MI SW of Lp 250 · Structure no. 061650000502232

Built
1975
50 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
630 ft
1 main span
Daily traffic
13,411
2022 count
Owner
State
State Highway Agency

About this bridge

FM 1788 over Bi 20 FM 662 and UP RR is a prestressed concrete stringer/multi-beam or girder carrying FM 1788 over Bi 20 FM 662 and UP RR in Midland County, Texas. It was built in 1975, so it is 50 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 13,411 vehicles a day, roughly 18% of them trucks, projected to reach 18,775 by 2042. The structure is 630 ft (192 m) long and 80 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM 1788
CrossesBi 20 FM 662 and UP RR
Location5.32 MI SW of Lp 250
RouteState Highway 1788
CountyMidland County
StateTexas
Coordinates31.92151, -102.21871
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadHS 20
Structure length630 ft (192 m)
Longest span121 ft (36.9 m)
Deck width80 ft (24.5 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,411 (2022)
Projected traffic18,775 by 2042
Trucks18%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 1788 over Bi 20 FM 662 and UP RR built?

It was built in 1975, making it 50 years old in 2025.

What condition is FM 1788 over Bi 20 FM 662 and UP RR 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 August 2023.

How much traffic does FM 1788 over Bi 20 FM 662 and UP RR carry?

About 13,411 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is FM 1788 over Bi 20 FM 662 and UP RR?

The structure is 630 ft (192 m) long with a longest span of 121 ft (36.9 m) and a deck 80 ft wide.

Who owns FM 1788 over Bi 20 FM 662 and UP RR?

It is owned by the State Highway Agency.