US Bridges

Sdb over Dowd Creek

Good

Hardin County, Iowa · 086193601 · Structure no. 000000000365301

Built
2009
16 years old
Condition
Good
inspected February 2023
Type
Tee Beam
Prestressed Concrete
Length
82 ft
2 main spans
Daily traffic
766
2022 count
Owner
County
County Highway Agency

About this bridge

Sdb over Dowd Creek is a prestressed concrete tee beam carrying Sdb over Dowd Creek in Hardin County, Iowa. It was built in 2009, so it is 16 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 766 vehicles a day, roughly 18% of them trucks, projected to reach 766 by 2043. The structure is 82 ft (25 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSdb
CrossesDowd Creek
Location086193601
RouteCounty Highway 0
CountyHardin County
StateIowa
Coordinates42.21551, -93.00172
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating73.5 US tons
Inventory rating44 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length82 ft (25 m)
Longest span40 ft (12.2 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic766 (2022)
Projected traffic766 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sdb over Dowd Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Sdb over Dowd Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Sdb over Dowd Creek carry?

About 766 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Sdb over Dowd Creek?

The structure is 82 ft (25 m) long with a longest span of 40 ft (12.2 m) and a deck 20 ft wide.

Who owns Sdb over Dowd Creek?

It is owned by the County Highway Agency.