US Bridges

Ut 8128 over Shannon River

Good

St. Louis County, Minnesota · 0.6 MI E of JCT Csah 5 · Structure no. 69A40

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
68 ft
2 main spans
Daily traffic
79
2016 count
Owner
County
County Highway Agency

About this bridge

Ut 8128 over Shannon River is a concrete continuous slab carrying Ut 8128 over Shannon River in St. Louis County, Minnesota. It was built in 2017, so it is 8 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 79 vehicles a day, projected to reach 95 by 2036. The structure is 68 ft (20.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUt 8128
CrossesShannon River
Location0.6 MI E of JCT Csah 5
RouteCounty Highway 8128
CountySt. Louis County
StateMinnesota
Coordinates47.57258, -92.98827
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length68 ft (20.6 m)
Longest span33 ft (10.1 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2016)
Projected traffic95 by 2036
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ut 8128 over Shannon River built?

It was built in 2017, making it 8 years old in 2025.

What condition is Ut 8128 over Shannon River 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 October 2023.

How much traffic does Ut 8128 over Shannon River carry?

About 79 vehicles per day (2016 count).

How long is Ut 8128 over Shannon River?

The structure is 68 ft (20.6 m) long with a longest span of 33 ft (10.1 m) and a deck 31 ft wide.

Who owns Ut 8128 over Shannon River?

It is owned by the County Highway Agency.