US Bridges

Earl Drive over Cottonwood Creek

Good

Matanuska-Susitna Borough, Alaska · Wasilla · Structure no. 1712

Built
2013
12 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
10
2018 count
Owner
County
County Highway Agency

About this bridge

Earl Drive over Cottonwood Creek is a steel stringer/multi-beam or girder carrying Earl Drive over Cottonwood Creek in Matanuska-Susitna Borough, Alaska. It was built in 2013, so it is 12 years old, younger than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, roughly 1% of them trucks, projected to reach 15 by 2035. The structure is 62 ft (18.9 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesEarl Drive
CrossesCottonwood Creek
LocationWasilla
RouteCounty Highway 0
StateAlaska
Coordinates61.60803, -149.29247
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation9: Superior to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating69.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length62 ft (18.9 m)
Longest span59 ft (18 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2018)
Projected traffic15 by 2035
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Earl Drive over Cottonwood Creek built?

It was built in 2013, making it 12 years old in 2025.

What condition is Earl Drive over Cottonwood Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Earl Drive over Cottonwood Creek carry?

About 10 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Earl Drive over Cottonwood Creek?

The structure is 62 ft (18.9 m) long with a longest span of 59 ft (18 m) and a deck 16 ft wide.

Who owns Earl Drive over Cottonwood Creek?

It is owned by the County Highway Agency.