US Bridges

270th ST over Crane Creek

PoorPosted for load

Bremer County, Iowa · 091123301 · Structure no. 000000000078760

Built
1900
125 years old
Condition
Poor
inspected April 2023
Type
Truss - Thru
Steel
Length
98 ft
1 main span
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

270th ST over Crane Creek is a steel truss - thru carrying 270th ST over Crane Creek in Bremer County, Iowa. It was built in 1900, so it is 125 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for other load-capacity restriction.

It carries about 20 vehicles a day, projected to reach 20 by 2043. The structure is 98 ft (29.9 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries270th ST
CrossesCrane Creek
Location091123301
RouteCounty Highway 0
CountyBremer County
StateIowa
Coordinates42.65683, -92.26132
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33.5 US tons
Inventory rating23.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length98 ft (29.9 m)
Longest span95 ft (29 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 270th ST over Crane Creek built?

It was built in 1900, making it 125 years old in 2025.

What condition is 270th ST over Crane Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does 270th ST over Crane Creek carry?

About 20 vehicles per day (2022 count).

How long is 270th ST over Crane Creek?

The structure is 98 ft (29.9 m) long with a longest span of 95 ft (29 m) and a deck 18 ft wide.

Who owns 270th ST over Crane Creek?

It is owned by the County Highway Agency.