US Bridges

FM 66 over South Prong Creek

Good

Ellis County, Texas · 2.1 MI SW of IH 35E · Structure no. 180710059602049

Built
2001
24 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
151 ft
3 main spans
Daily traffic
7,758
2023 count
Owner
State
State Highway Agency

About this bridge

FM 66 over South Prong Creek is a prestressed concrete stringer/multi-beam or girder carrying FM 66 over South Prong Creek in Ellis County, Texas. It was built in 2001, so it is 24 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 7,758 vehicles a day, roughly 4% of them trucks, projected to reach 7,980 by 2033. The structure is 151 ft (46 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFM 66
CrossesSouth Prong Creek
Location2.1 MI SW of IH 35E
RouteState Highway 66
CountyEllis County
StateTexas
Coordinates32.36059, -96.89508
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable 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, precast panels
Main spans3
Design loadHS 20
Structure length151 ft (46 m)
Longest span59 ft (18 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,758 (2023)
Projected traffic7,980 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 66 over South Prong Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is FM 66 over South Prong 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 December 2023.

How much traffic does FM 66 over South Prong Creek carry?

About 7,758 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is FM 66 over South Prong Creek?

The structure is 151 ft (46 m) long with a longest span of 59 ft (18 m) and a deck 41 ft wide.

Who owns FM 66 over South Prong Creek?

It is owned by the State Highway Agency.