US Bridges

Csah 91 over Millers Creek

Fair

St. Louis County, Minnesota · 0.1 MI N of JCT TH 53 · Structure no. 91675

Built
1980
45 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
10,000
2015 count
Owner
County
County Highway Agency

About this bridge

Csah 91 over Millers Creek is a concrete culvert carrying Csah 91 over Millers Creek in St. Louis County, Minnesota. It was built in 1980, so it is 45 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 6 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 10,000 by 2035. The structure is 31 ft (9.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCsah 91
CrossesMillers Creek
Location0.1 MI N of JCT TH 53
RouteCounty Highway 91
Coordinates46.81557, -92.17478
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2015)
Projected traffic10,000 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 91 over Millers Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Csah 91 over Millers 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 July 2024.

How much traffic does Csah 91 over Millers Creek carry?

About 10,000 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Csah 91 over Millers Creek?

The structure is 31 ft (9.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Csah 91 over Millers Creek?

It is owned by the County Highway Agency.