Structure 69624 · St. Louis County, MN

Csah 29 over ST Louis River

Carries Csah 29 over ST Louis River, 0.1 Mi E Of Jct CR 149.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT314 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

314 ft end to end, longest span 128 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.

Built200026 years old
Length313.6 ft95.6 m
Daily traffic195counted 2019
Last inspectedSeptember 2024every 24 months

Location

StateMinnesota
CountySt. Louis
Location0.1 Mi E Of Jct CR 149
CarriesCsah 29
CrossesST Louis River
Coordinates46.99637, -92.80845

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length313.6 ft (95.6 m)
Max Span128.0 ft (39 m)
Deck Width42.7 ft (13 m)
Deck Area1242.8 sq m
Main Spans3
Year Built2000

Traffic

Avg Daily Traffic195 (2019)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number69624

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