US Bridges

Local RD over Dd #29

Fair

Pocahontas County, Iowa · 090343502 · Structure no. 000000000278381

Built
1979
46 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Local RD over Dd #29 is a concrete slab carrying Local RD over Dd #29 in Pocahontas County, Iowa. It was built in 1979, so it is 46 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 26 vehicles a day, projected to reach 26 by 2043. The structure is 33 ft (10.1 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLocal RD
CrossesDd #29
Location090343502
RouteCounty Highway 0
CountyPocahontas County
StateIowa
Coordinates42.56702, -94.83568
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local RD over Dd #29 built?

It was built in 1979, making it 46 years old in 2025.

What condition is Local RD over Dd #29 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 October 2023.

How much traffic does Local RD over Dd #29 carry?

About 26 vehicles per day (2022 count).

How long is Local RD over Dd #29?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns Local RD over Dd #29?

It is owned by the County Highway Agency.