Structure C007401510 · Richardson County, NE

637 Av-south 708tr over S Fk Big Nemaha River

Carries 637 Av-south 708tr over S Fk Big Nemaha River, 2.5w2.7s Daw(637a-s708tr).

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT288 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

288 ft end to end, longest span 111 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built197947 years old
Length288.1 ft87.8 m
Daily traffic50counted 2023
Last inspectedOctober 2023every 24 months

Location

StateNebraska
CountyRichardson
Location2.5w2.7s Daw(637a-s708tr)
Carries637 Av-south 708tr
CrossesS Fk Big Nemaha River
Coordinates40.09160, -95.87740

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length288.1 ft (87.8 m)
Max Span110.9 ft (33.8 m)
Deck Width30.2 ft (9.2 m)
Deck Area807.8 sq m
Main Spans3
Year Built1979

Traffic

Avg Daily Traffic50 (2023)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberC007401510

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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