US Bridges

E66 over Salt Creek

Poor

Tama County, Iowa · 082132403 · Structure no. 000000000049761

Built
1976
49 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
288 ft
3 main spans
Daily traffic
650
2023 count
Owner
County
County Highway Agency

About this bridge

E66 over Salt Creek is a prestressed concrete stringer/multi-beam or girder carrying E66 over Salt Creek in Tama County, Iowa. It was built in 1976, so it is 49 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 650 vehicles a day, roughly 15% of them trucks, projected to reach 650 by 2044. The structure is 288 ft (87.8 m) long and 40 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesE66
CrossesSalt Creek
Location082132403
RouteCounty Highway 0
StateIowa
Coordinates41.90626, -92.30667
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.4 US tons
Inventory rating37.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length288 ft (87.8 m)
Longest span97 ft (29.6 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic650 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was E66 over Salt Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is E66 over Salt Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does E66 over Salt Creek carry?

About 650 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is E66 over Salt Creek?

The structure is 288 ft (87.8 m) long with a longest span of 97 ft (29.6 m) and a deck 40 ft wide.

Who owns E66 over Salt Creek?

It is owned by the County Highway Agency.