US Bridges

270th ST over Creek

PoorPosted for load

Dickinson County, Iowa · 097350301 · Structure no. 000000000117170

Built
1926
99 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
41
2021 count
Owner
County
County Highway Agency

About this bridge

270th ST over Creek is a steel stringer/multi-beam or girder carrying 270th ST over Creek in Dickinson County, Iowa. It was built in 1926, so it is 99 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 41 vehicles a day, projected to reach 41 by 2043. The structure is 36 ft (11 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries270th ST
CrossesCreek
Location097350301
RouteCounty Highway 0
CountyDickinson County
StateIowa
Coordinates43.25518, -94.97222
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33.2 US tons
Inventory rating19.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2021)
Projected traffic41 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 Creek built?

It was built in 1926, making it 99 years old in 2025.

What condition is 270th ST over 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 Creek carry?

About 41 vehicles per day (2021 count).

How long is 270th ST over Creek?

The structure is 36 ft (11 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns 270th ST over Creek?

It is owned by the County Highway Agency.