US Bridges

FM 487 over N Fk Donahue Crk

Good

Williamson County, Texas · 3.20 MI E of IH 35 · Structure no. 142460120102016

Built
1988
37 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
893
2021 count
Owner
State
State Highway Agency

About this bridge

FM 487 over N Fk Donahue Crk is a prestressed concrete stringer/multi-beam or girder carrying FM 487 over N Fk Donahue Crk in Williamson County, Texas. It was built in 1988, so it is 37 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 893 vehicles a day, roughly 32% of them trucks, projected to reach 1,250 by 2041. The structure is 75 ft (22.9 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM 487
CrossesN Fk Donahue Crk
Location3.20 MI E of IH 35
RouteState Highway 487
StateTexas
Coordinates30.83298, -97.55592
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span75 ft (22.9 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic893 (2021)
Projected traffic1,250 by 2041
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 487 over N Fk Donahue Crk built?

It was built in 1988, making it 37 years old in 2025.

What condition is FM 487 over N Fk Donahue Crk 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 February 2023.

How much traffic does FM 487 over N Fk Donahue Crk carry?

About 893 vehicles per day (2021 count), of which roughly 32% are trucks.

How long is FM 487 over N Fk Donahue Crk?

The structure is 75 ft (22.9 m) long with a longest span of 75 ft (22.9 m) and a deck 36 ft wide.

Who owns FM 487 over N Fk Donahue Crk?

It is owned by the State Highway Agency.