US Bridges

Csah 137 over Mn 15

Fair

Stearns County, Minnesota · 0.9 MI S of JCT TH 23 · Structure no. 73019

Built
1978
47 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
244 ft
2 main spans
Daily traffic
8,700
2017 count
Owner
State
State Highway Agency

About this bridge

Csah 137 over Mn 15 is a steel continuous stringer/multi-beam or girder carrying Csah 137 over Mn 15 in Stearns County, Minnesota. It was built in 1978, so it is 47 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 8,700 vehicles a day, projected to reach 8,700 by 2039. The structure is 244 ft (74.5 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCsah 137
CrossesMn 15
Location0.9 MI S of JCT TH 23
RouteCounty Highway 137
CountyStearns County
StateMinnesota
Coordinates45.54048, -94.20747
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.7 US tons
Inventory rating57.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length244 ft (74.5 m)
Longest span120 ft (36.6 m)
Deck width57 ft (17.3 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,700 (2017)
Projected traffic8,700 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 137 over Mn 15 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Csah 137 over Mn 15 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 August 2023.

How much traffic does Csah 137 over Mn 15 carry?

About 8,700 vehicles per day (2017 count).

How long is Csah 137 over Mn 15?

The structure is 244 ft (74.5 m) long with a longest span of 120 ft (36.6 m) and a deck 57 ft wide.

Who owns Csah 137 over Mn 15?

It is owned by the State Highway Agency.