US Bridges

NB I-29 over Burcham Creek

Fair

Harrison County, Iowa · 1.2 Mi. S of Jct. Ia 127 · Structure no. 000000000028260

Built
1967
58 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
92 ft
3 main spans
Daily traffic
7,600
2022 count
Owner
State
State Highway Agency

About this bridge

NB I-29 over Burcham Creek is a concrete continuous slab carrying NB I-29 over Burcham Creek in Harrison County, Iowa. It was built in 1967, so it is 58 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 7,600 vehicles a day, roughly 31% of them trucks, projected to reach 7,600 by 2044. The structure is 92 ft (28 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB I-29
CrossesBurcham Creek
Location1.2 Mi. S of Jct. Ia 127
RouteInterstate 29
CountyHarrison County
StateIowa
Coordinates41.69401, -96.04222
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length92 ft (28 m)
Longest span35 ft (10.7 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2022)
Projected traffic7,600 by 2044
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 NB I-29 over Burcham Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is NB I-29 over Burcham 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 February 2024.

How much traffic does NB I-29 over Burcham Creek carry?

About 7,600 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is NB I-29 over Burcham Creek?

The structure is 92 ft (28 m) long with a longest span of 35 ft (10.7 m) and a deck 42 ft wide.

Who owns NB I-29 over Burcham Creek?

It is owned by the State Highway Agency.