US Bridges

Sma 9773;LINDER RD over Boise River;n. Channel

Good

Ada County, Idaho · 0.7 S. 3.0 W. Eagle · Structure no. 000000000019796

Built
1992
33 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
431 ft
5 main spans
Daily traffic
22,000
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 9773;LINDER RD over Boise River;n. Channel is a prestressed concrete stringer/multi-beam or girder carrying Sma 9773;LINDER RD over Boise River;n. Channel in Ada County, Idaho. It was built in 1992, so it is 33 years old, younger than the Idaho average of 45.3 years.

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

It carries about 22,000 vehicles a day, roughly 5% of them trucks, projected to reach 33,000 by 2042. The structure is 431 ft (131.4 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSma 9773;LINDER RD
CrossesBoise River;n. Channel
Location0.7 S. 3.0 W. Eagle
RouteCounty Highway 9773
StateIdaho
Coordinates43.68742, -116.41369
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating17 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length431 ft (131.4 m)
Longest span85 ft (25.9 m)
Deck width52 ft (15.7 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2023)
Projected traffic33,000 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 9773;LINDER RD over Boise River;n. Channel built?

It was built in 1992, making it 33 years old in 2025.

What condition is Sma 9773;LINDER RD over Boise River;n. Channel 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 September 2024.

How much traffic does Sma 9773;LINDER RD over Boise River;n. Channel carry?

About 22,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sma 9773;LINDER RD over Boise River;n. Channel?

The structure is 431 ft (131.4 m) long with a longest span of 85 ft (25.9 m) and a deck 52 ft wide.

Who owns Sma 9773;LINDER RD over Boise River;n. Channel?

It is owned by the County Highway Agency.