US Bridges

Miama Lake Wma over Lake Miami

FairPosted for load

Monroe County, Iowa · 073171703 · Structure no. 000000000365550

Built
1900
125 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
5
2022 count
Owner
Local
Local Park, Forest, or Reservation Agency

About this bridge

Miama Lake Wma over Lake Miami is a steel stringer/multi-beam or girder carrying Miama Lake Wma over Lake Miami in Monroe County, Iowa. It was built in 1900, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2043. The structure is 33 ft (10.1 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMiama Lake Wma
CrossesLake Miami
Location073171703
RouteState Lands Road 0
CountyMonroe County
StateIowa
Coordinates41.12323, -92.84494
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 protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating15.4 US tons
Inventory rating12.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerLocal Park, Forest, or Reservation 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Miama Lake Wma over Lake Miami built?

It was built in 1900, making it 125 years old in 2025.

What condition is Miama Lake Wma over Lake Miami 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 December 2023.

How much traffic does Miama Lake Wma over Lake Miami carry?

About 5 vehicles per day (2022 count).

How long is Miama Lake Wma over Lake Miami?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 24 ft wide.

Who owns Miama Lake Wma over Lake Miami?

It is owned by the Local Park, Forest, or Reservation Agency and maintained by the County Highway Agency.