Structure 7161 · Grant County, NM

Nm-211 over Duck Creek

Carries Nm-211 over Duck Creek, 0.2 Mi E Of Us-180/cliff.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
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 FT150 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

150 ft end to end, longest span 50 ft: about 2 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.

Built196957 years old
Length150.3 ft45.8 m
Daily traffic644counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Mexico
CountyGrant
Location0.2 Mi E Of Us-180/cliff
CarriesNm-211
CrossesDuck Creek
Coordinates32.96476, -108.61123

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length150.3 ft (45.8 m)
Max Span49.5 ft (15.1 m)
Deck Width38.1 ft (11.6 m)
Deck Area531.3 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic644 (2023)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000007161

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.

Nearby Bridges