US Bridges

Local over Dd 175

PoorPosted for load

Palo Alto County, Iowa · 096333403 · Structure no. 000000000269995

Built
1960
65 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
82 ft
1 main span
Daily traffic
51
2021 count
Owner
County
County Highway Agency

About this bridge

Local over Dd 175 is a steel stringer/multi-beam or girder carrying Local over Dd 175 in Palo Alto County, Iowa. It was built in 1960, so it is 65 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 51 vehicles a day, projected to reach 51 by 2043. The structure is 82 ft (25 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLocal
CrossesDd 175
Location096333403
RouteCounty Highway 0
CountyPalo Alto County
StateIowa
Coordinates43.09751, -94.72004
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 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 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.4 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length82 ft (25 m)
Longest span80 ft (24.4 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2021)
Projected traffic51 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Dd 175 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Local over Dd 175 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 Local over Dd 175 carry?

About 51 vehicles per day (2021 count).

How long is Local over Dd 175?

The structure is 82 ft (25 m) long with a longest span of 80 ft (24.4 m) and a deck 22 ft wide.

Who owns Local over Dd 175?

It is owned by the County Highway Agency.