US Bridges

Birdland Drive over Birdland Lagoon

Fair

Polk County, Iowa · 079243583 · Structure no. 000000000501420

Built
1930
95 years old
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete
Length
40 ft
1 main span
Daily traffic
351
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Birdland Drive over Birdland Lagoon is a concrete arch - deck carrying Birdland Drive over Birdland Lagoon in Polk County, Iowa. It was built in 1930, so it is 95 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 351 vehicles a day, projected to reach 351 by 2043. The structure is 40 ft (12.2 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBirdland Drive
CrossesBirdland Lagoon
Location079243583
RouteState Lands Road 0
CountyPolk County
StateIowa
Coordinates41.61182, -93.61247
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating81.5 US tons
Inventory rating48.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width42 ft (12.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic351 (2022)
Projected traffic351 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Birdland Drive over Birdland Lagoon built?

It was built in 1930, making it 95 years old in 2025.

What condition is Birdland Drive over Birdland Lagoon 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 July 2023.

How much traffic does Birdland Drive over Birdland Lagoon carry?

About 351 vehicles per day (2022 count).

How long is Birdland Drive over Birdland Lagoon?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 42 ft wide.

Who owns Birdland Drive over Birdland Lagoon?

It is owned by the City or Municipal Highway Agency.