US Bridges

Water Street over Water ST No 3

Good

Ketchikan Gateway Borough, Alaska · Mile Point 0.1 · Structure no. 2313

Built
2017
8 years old
Condition
Good
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
650
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Water Street over Water ST No 3 is a prestressed concrete tee beam carrying Water Street over Water ST No 3 in Ketchikan Gateway Borough, Alaska. It was built in 2017, so it is 8 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 650 vehicles a day, roughly 1% of them trucks, projected to reach 818 by 2034. The structure is 75 ft (22.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWater Street
CrossesWater ST No 3
LocationMile Point 0.1
RouteCity Street 0
StateAlaska
Coordinates55.34611, -131.65972
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
Deck9 ExcellentNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating67.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length75 ft (22.9 m)
Longest span71 ft (21.6 m)
Deck width26 ft (7.8 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2018)
Projected traffic818 by 2034
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Water Street over Water ST No 3 built?

It was built in 2017, making it 8 years old in 2025.

What condition is Water Street over Water ST No 3 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 2023.

How much traffic does Water Street over Water ST No 3 carry?

About 650 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Water Street over Water ST No 3?

The structure is 75 ft (22.9 m) long with a longest span of 71 ft (21.6 m) and a deck 26 ft wide.

Who owns Water Street over Water ST No 3?

It is owned by the City or Municipal Highway Agency.