US Bridges

Mn 23 over Mission Creek

Fair

St. Louis County, Minnesota · 0.3 MI E of JCT TH 210 · Structure no. 5757

Built
1937
88 years old
Condition
Fair
inspected September 2023
Type
Culvert
Steel
Length
86 ft
2 main spans
Daily traffic
2,000
2019 count
Owner
State
State Highway Agency

About this bridge

Mn 23 over Mission Creek is a steel culvert carrying Mn 23 over Mission Creek in St. Louis County, Minnesota. It was built in 1937, so it is 88 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,000 vehicles a day, roughly 4% of them trucks, projected to reach 1,900 by 2039. The structure is 86 ft (26.2 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesMn 23
CrossesMission Creek
Location0.3 MI E of JCT TH 210
RouteState Highway 23
CountySt. Louis County
StateMinnesota
Coordinates46.66048, -92.27567
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.4 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 15
Structure length86 ft (26.2 m)
Longest span19 ft (5.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2019)
Projected traffic1,900 by 2039
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1,000 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 23 over Mission Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Mn 23 over Mission Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does Mn 23 over Mission Creek carry?

About 2,000 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Mn 23 over Mission Creek?

The structure is 86 ft (26.2 m) long with a longest span of 19 ft (5.9 m).

Who owns Mn 23 over Mission Creek?

It is owned by the State Highway Agency.