US Bridges

D12 110th ST over Pierson Creek

Fair

Woodbury County, Iowa · 0894312 · Structure no. 000000000053411

Built
1993
32 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
738
2022 count
Owner
County
County Highway Agency

About this bridge

D12 110th ST over Pierson Creek is a concrete continuous slab carrying D12 110th ST over Pierson Creek in Woodbury County, Iowa. It was built in 1993, so it is 32 years old, younger 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 738 vehicles a day, roughly 12% of them trucks, projected to reach 738 by 2043. The structure is 91 ft (27.7 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesD12 110th ST
CrossesPierson Creek
Location0894312
RouteCounty Highway 0
CountyWoodbury County
StateIowa
Coordinates42.54735, -95.87626
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.2 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span34 ft (10.4 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic738 (2022)
Projected traffic738 by 2043
Trucks12%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was D12 110th ST over Pierson Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is D12 110th ST over Pierson 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 June 2023.

How much traffic does D12 110th ST over Pierson Creek carry?

About 738 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is D12 110th ST over Pierson Creek?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 33 ft wide.

Who owns D12 110th ST over Pierson Creek?

It is owned by the County Highway Agency.