US Bridges

So Hills DR over US 20 & US 75

Fair

Woodbury County, Iowa · 3.0 MI W of Ia 12 · Structure no. 000000000601000

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
320 ft
4 main spans
Daily traffic
6,120
2022 count
Owner
State
State Highway Agency

About this bridge

So Hills DR over US 20 & US 75 is a prestressed concrete stringer/multi-beam or girder carrying So Hills DR over US 20 & US 75 in Woodbury County, Iowa. It was built in 1975, so it is 50 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 6 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 6,120 vehicles a day, projected to reach 6,120 by 2044. The structure is 320 ft (97.5 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesSo Hills DR
CrossesUS 20 & US 75
Location3.0 MI W of Ia 12
RouteCity Street 0
CountyWoodbury County
StateIowa
Coordinates42.44327, -96.35274
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating40.7 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length320 ft (97.5 m)
Longest span91 ft (27.7 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,120 (2022)
Projected traffic6,120 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was So Hills DR over US 20 & US 75 built?

It was built in 1975, making it 50 years old in 2025.

What condition is So Hills DR over US 20 & US 75 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 September 2024.

How much traffic does So Hills DR over US 20 & US 75 carry?

About 6,120 vehicles per day (2022 count).

How long is So Hills DR over US 20 & US 75?

The structure is 320 ft (97.5 m) long with a longest span of 91 ft (27.7 m) and a deck 33 ft wide.

Who owns So Hills DR over US 20 & US 75?

It is owned by the State Highway Agency.