US Bridges

Local over Seven Mile Creek

PoorPosted for load

Decatur County, Iowa · 067271401 · Structure no. 000000000136590

Built
1963
62 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
103
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Seven Mile Creek is a steel stringer/multi-beam or girder carrying Local over Seven Mile Creek in Decatur County, Iowa. It was built in 1963, so it is 62 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 103 vehicles a day, projected to reach 103 by 2043. The structure is 25 ft (7.6 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLocal
CrossesSeven Mile Creek
Location067271401
RouteCounty Highway 0
StateIowa
Coordinates40.60917, -93.92899
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 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 rating26.7 US tons
Inventory rating16 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103 (2022)
Projected traffic103 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$446,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Seven Mile Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Local over Seven Mile 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 November 2023.

How much traffic does Local over Seven Mile Creek carry?

About 103 vehicles per day (2022 count).

How long is Local over Seven Mile Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 20 ft wide.

Who owns Local over Seven Mile Creek?

It is owned by the County Highway Agency.