US Bridges

21 RD over Platte River Trib

Good

Hamilton County, Nebraska · JCT N14/S-41C 1S 7W · Structure no. C004102605P

Built
1935
90 years old, rebuilt 2020
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
370
2011 count
Owner
County
County Highway Agency

About this bridge

21 RD over Platte River Trib is a steel stringer/multi-beam or girder carrying 21 RD over Platte River Trib in Hamilton County, Nebraska. It was built in 1935 and reconstructed in 2020, so it is 90 years old, older than the Nebraska average of 47.1 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 370 vehicles a day, projected to reach 340 by 2033. The structure is 30 ft (9.1 m) long and 25 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Carries21 RD
CrossesPlatte River Trib
LocationJCT N14/S-41C 1S 7W
RouteCounty Highway 2495
Coordinates40.9872, -98.1298
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 protection7 GoodSome minor problems.
Last inspectionNovember 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating81.6 US tons
Inventory rating62.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2011)
Projected traffic340 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 21 RD over Platte River Trib built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2020.

What condition is 21 RD over Platte River Trib 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 November 2023.

How much traffic does 21 RD over Platte River Trib carry?

About 370 vehicles per day (2011 count).

How long is 21 RD over Platte River Trib?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.

Who owns 21 RD over Platte River Trib?

It is owned by the County Highway Agency.