US Bridges

US 136 over Mississippi River RR RD

Fair

Lee County, Iowa · Over Miss. River-Keokuk · Structure no. 000000000033201

Built
1985
40 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,346 ft
15 main spans
Daily traffic
10,500
2022 count
Owner
State
State Highway Agency

About this bridge

US 136 over Mississippi River RR RD is a steel continuous stringer/multi-beam or girder carrying US 136 over Mississippi River RR RD in Lee County, Iowa. It was built in 1985, so it is 40 years old, younger 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 10,500 vehicles a day, roughly 6% of them trucks, projected to reach 10,500 by 2042. The structure is 3,346 ft (1,019.9 m) long and 76 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

Location

Open in Google Maps
CarriesUS 136
CrossesMississippi River RR RD
LocationOver Miss. River-Keokuk
RouteU.S. Route 136
CountyLee County
StateIowa
Coordinates40.39237, -91.37984
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
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 inspectionSeptember 2022
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20
Structure length3,346 ft (1,019.9 m)
Longest span295 ft (89.9 m)
Deck width76 ft (23.1 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2022)
Projected traffic10,500 by 2042
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed80.2 mi (129 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 136 over Mississippi River RR RD built?

It was built in 1985, making it 40 years old in 2025.

What condition is US 136 over Mississippi River RR RD 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 September 2022.

How much traffic does US 136 over Mississippi River RR RD carry?

About 10,500 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US 136 over Mississippi River RR RD?

The structure is 3,346 ft (1,019.9 m) long with a longest span of 295 ft (89.9 m) and a deck 76 ft wide.

Who owns US 136 over Mississippi River RR RD?

It is owned by the State Highway Agency.