US Bridges

Sisley Grove RD over Morgan Creek

Fair

Linn County, Iowa · 083083204 · Structure no. 000000000221181

Built
1994
31 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
48 ft
2 main spans
Daily traffic
33
2022 count
Owner
County
County Highway Agency

About this bridge

Sisley Grove RD over Morgan Creek is a wood or timber slab carrying Sisley Grove RD over Morgan Creek in Linn County, Iowa. It was built in 1994, so it is 31 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 33 vehicles a day, projected to reach 33 by 2044. The structure is 48 ft (14.6 m) long and 25 ft wide.

Location

Open in Google Maps
CarriesSisley Grove RD
CrossesMorgan Creek
Location083083204
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates41.9618, -91.81364
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating86.3 US tons
Inventory rating63.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span23 ft (7 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (2022)
Projected traffic33 by 2044
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 Sisley Grove RD over Morgan Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Sisley Grove RD over Morgan 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 September 2024.

How much traffic does Sisley Grove RD over Morgan Creek carry?

About 33 vehicles per day (2022 count).

How long is Sisley Grove RD over Morgan Creek?

The structure is 48 ft (14.6 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns Sisley Grove RD over Morgan Creek?

It is owned by the County Highway Agency.