US Bridges

Msas 109 over I 35; Sboff Ramp

Fair

St. Louis County, Minnesota · 1.3 MI SW of JCT TH 535 · Structure no. 69827

Built
1967
58 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
184 ft
4 main spans
Daily traffic
2,050
2018 count
Owner
State
State Highway Agency

About this bridge

Msas 109 over I 35; Sboff Ramp is a steel continuous stringer/multi-beam or girder carrying Msas 109 over I 35; Sboff Ramp in St. Louis County, Minnesota. It was built in 1967, so it is 58 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 2,050 vehicles a day, projected to reach 970 by 2038. The structure is 184 ft (56.2 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMsas 109
CrossesI 35; Sboff Ramp
Location1.3 MI SW of JCT TH 535
RouteCity Street 109
CountySt. Louis County
StateMinnesota
Coordinates46.75094, -92.14329
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.7 US tons
Inventory rating35.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length184 ft (56.2 m)
Longest span68 ft (20.7 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,050 (2018)
Projected traffic970 by 2038
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$1,000 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Msas 109 over I 35; Sboff Ramp built?

It was built in 1967, making it 58 years old in 2025.

What condition is Msas 109 over I 35; Sboff Ramp 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 Msas 109 over I 35; Sboff Ramp carry?

About 2,050 vehicles per day (2018 count).

How long is Msas 109 over I 35; Sboff Ramp?

The structure is 184 ft (56.2 m) long with a longest span of 68 ft (20.7 m) and a deck 38 ft wide.

Who owns Msas 109 over I 35; Sboff Ramp?

It is owned by the State Highway Agency.