US Bridges

SB US 75 over Dry Creek

Fair

Plymouth County, Iowa · 3.4 Mi. N of Jct. SR C60 · Structure no. 000000000039510

Built
1948
77 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
7,000
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 75 over Dry Creek is a steel stringer/multi-beam or girder carrying SB US 75 over Dry Creek in Plymouth County, Iowa. It was built in 1948, so it is 77 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,000 vehicles a day, roughly 19% of them trucks, projected to reach 7,000 by 2042. The structure is 43 ft (13.1 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB US 75
CrossesDry Creek
Location3.4 Mi. N of Jct. SR C60
RouteU.S. Route 75
CountyPlymouth County
StateIowa
Coordinates42.67366, -96.27258
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

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.
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating33.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length43 ft (13.1 m)
Longest span41 ft (12.5 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2022)
Projected traffic7,000 by 2042
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SB US 75 over Dry Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is SB US 75 over Dry Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does SB US 75 over Dry Creek carry?

About 7,000 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is SB US 75 over Dry Creek?

The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.5 m) and a deck 35 ft wide.

Who owns SB US 75 over Dry Creek?

It is owned by the State Highway Agency.