Structure S020 19981 · Cherry County, NE

Frontage/old 20 over Niobrara River

Carries Frontage/old 20 over Niobrara River, 3se Valentine.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
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 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

288 ft end to end, longest span 145 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 deck truss.

Built1931rebuilt 1997
Length288.1 ft87.8 m
Daily traffic25counted 1998
Last inspectedJuly 2024every 24 months

Location

StateNebraska
CountyCherry
Location3se Valentine
CarriesFrontage/old 20
CrossesNiobrara River
Coordinates42.83200, -100.52800

Physical Characteristics

MaterialSteel Continuous
DesignTruss - Deck
Total Length288.1 ft (87.8 m)
Max Span145.3 ft (44.3 m)
Deck Width27.9 ft (8.5 m)
Deck Area746.3 sq m
Main Spans3
Year Built1931 (reconstructed 1997)

Traffic

Avg Daily Traffic25 (1998)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical5 — Stable for scour
Structure NumberS020 19981

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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