US Bridges

40th ST over Otter CR

PoorPosted for load

Fayette County, Iowa · 091091903 · Structure no. 000000000149690

Built
1917
108 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
86 ft
2 main spans
Daily traffic
88
2022 count
Owner
County
County Highway Agency

About this bridge

40th ST over Otter CR is a concrete stringer/multi-beam or girder carrying 40th ST over Otter CR in Fayette County, Iowa. It was built in 1917, so it is 108 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 load restriction.

It carries about 88 vehicles a day, projected to reach 88 by 2043. The structure is 86 ft (26.2 m) long and 22 ft wide.

Location

Open in Google Maps
Carries40th ST
CrossesOtter CR
Location091091903
RouteCounty Highway 0
CountyFayette County
StateIowa
Coordinates42.68598, -91.94729
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating8.9 US tons
Inventory rating6.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length86 ft (26.2 m)
Longest span42 ft (12.8 m)
Deck width22 ft (6.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88 (2022)
Projected traffic88 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$180,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 40th ST over Otter CR built?

It was built in 1917, making it 108 years old in 2025.

What condition is 40th ST over Otter CR 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 October 2023.

How much traffic does 40th ST over Otter CR carry?

About 88 vehicles per day (2022 count).

How long is 40th ST over Otter CR?

The structure is 86 ft (26.2 m) long with a longest span of 42 ft (12.8 m) and a deck 22 ft wide.

Who owns 40th ST over Otter CR?

It is owned by the County Highway Agency.