US Bridges

Chain Bridge Road over Lone Tree Creek

Fair

Linn County, Iowa · 000000000 · Structure no. 000000000221841

Built
1984
41 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
171
2021 count
Owner
County
County Highway Agency

About this bridge

Chain Bridge Road over Lone Tree Creek is a concrete continuous culvert carrying Chain Bridge Road over Lone Tree Creek in Linn County, Iowa. It was built in 1984, so it is 41 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 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 171 vehicles a day, projected to reach 171 by 2043. The structure is 25 ft (7.5 m) long.

Location

Open in Google Maps
CarriesChain Bridge Road
CrossesLone Tree Creek
Location000000000
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.05125, -91.78765
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating35.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic171 (2021)
Projected traffic171 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Chain Bridge Road over Lone Tree Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Chain Bridge Road over Lone Tree 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 March 2023.

How much traffic does Chain Bridge Road over Lone Tree Creek carry?

About 171 vehicles per day (2021 count).

How long is Chain Bridge Road over Lone Tree Creek?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Chain Bridge Road over Lone Tree Creek?

It is owned by the County Highway Agency.