US Bridges

Sma 3824;BANKS Low over Rock Cliff Gini Half Brd

Fair

Boise County, Idaho · 0.5 S. 7.3 W. Lowman · Structure no. 000000000019917

Built
1991
34 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
115 ft
1 main span
Daily traffic
690
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 3824;BANKS Low over Rock Cliff Gini Half Brd is a prestressed concrete stringer/multi-beam or girder carrying Sma 3824;BANKS Low over Rock Cliff Gini Half Brd in Boise County, Idaho. It was built in 1991, so it is 34 years old, younger than the Idaho average of 45.3 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 690 vehicles a day, roughly 13% of them trucks, projected to reach 1,035 by 2042. The structure is 115 ft (35.1 m) long and 18 ft wide. If it were closed, the detour would be 67.7 mi (109 km).

CarriesSma 3824;BANKS Low
CrossesRock Cliff Gini Half Brd
Location0.5 S. 7.3 W. Lowman
RouteCounty Highway 3824
StateIdaho
Coordinates44.07083, -115.75353
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating88 US tons
Inventory rating30 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span112 ft (34.1 m)
Deck width18 ft (5.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (2023)
Projected traffic1,035 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed67.7 mi (109 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sma 3824;BANKS Low over Rock Cliff Gini Half Brd built?

It was built in 1991, making it 34 years old in 2025.

What condition is Sma 3824;BANKS Low over Rock Cliff Gini Half Brd 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 2023.

How much traffic does Sma 3824;BANKS Low over Rock Cliff Gini Half Brd carry?

About 690 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Sma 3824;BANKS Low over Rock Cliff Gini Half Brd?

The structure is 115 ft (35.1 m) long with a longest span of 112 ft (34.1 m) and a deck 18 ft wide.

Who owns Sma 3824;BANKS Low over Rock Cliff Gini Half Brd?

It is owned by the County Highway Agency.