US Bridges

State Road 258 over Webster Dam Spillway

Good

Rooks County, Kansas · 1 MI S. of US 24 · Structure no. NKA-WUSD-001

Built
1958
67 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Concrete
Length
121 ft
3 main spans
Daily traffic
100
2018 count
Owner
Federal
Bureau of Reclamation

About this bridge

State Road 258 over Webster Dam Spillway is a concrete tee beam carrying State Road 258 over Webster Dam Spillway in Rooks County, Kansas. It was built in 1958, so it is 67 years old, older than the Kansas average of 52.8 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 120 by 2046. The structure is 121 ft (36.9 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesState Road 258
CrossesWebster Dam Spillway
Location1 MI S. of US 24
RouteState Highway 258
CountyRooks County
StateKansas
Coordinates39.41571, -99.42512
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating30.3 US tons
Inventory rating23.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckOther
Main spans3
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span33 ft (10.2 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2018)
Projected traffic120 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Reclamation
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 State Road 258 over Webster Dam Spillway built?

It was built in 1958, making it 67 years old in 2025.

What condition is State Road 258 over Webster Dam Spillway 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 May 2024.

How much traffic does State Road 258 over Webster Dam Spillway carry?

About 100 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is State Road 258 over Webster Dam Spillway?

The structure is 121 ft (36.9 m) long with a longest span of 33 ft (10.2 m) and a deck 28 ft wide.

Who owns State Road 258 over Webster Dam Spillway?

It is owned by the Bureau of Reclamation.