US Bridges

270th ST over Quarter Section Run

FairPosted for load

Bremer County, Iowa · 091133501 · Structure no. 000000000079010

Built
1951
74 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
124 ft
3 main spans
Daily traffic
118
2022 count
Owner
County
County Highway Agency

About this bridge

270th ST over Quarter Section Run is a steel continuous stringer/multi-beam or girder carrying 270th ST over Quarter Section Run in Bremer County, Iowa. It was built in 1951, so it is 74 years old, older than the Iowa average of 45.5 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. Its operating status is: posted for load restriction.

It carries about 118 vehicles a day, projected to reach 118 by 2043. The structure is 124 ft (37.8 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries270th ST
CrossesQuarter Section Run
Location091133501
RouteCounty Highway 0
CountyBremer County
StateIowa
Coordinates42.65683, -92.33975
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating29.5 US tons
Inventory rating19.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length124 ft (37.8 m)
Longest span47 ft (14.3 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2022)
Projected traffic118 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 270th ST over Quarter Section Run built?

It was built in 1951, making it 74 years old in 2025.

What condition is 270th ST over Quarter Section Run 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 April 2023.

How much traffic does 270th ST over Quarter Section Run carry?

About 118 vehicles per day (2022 count).

How long is 270th ST over Quarter Section Run?

The structure is 124 ft (37.8 m) long with a longest span of 47 ft (14.3 m) and a deck 22 ft wide.

Who owns 270th ST over Quarter Section Run?

It is owned by the County Highway Agency.