US Bridges

Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic

Fair

Ada County, Idaho · In Boise;curtis Road · Structure no. 000000000021285

Built
1968
57 years old
Condition
Fair
inspected April 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
203 ft
4 main spans
Daily traffic
24,500
2023 count
Owner
State
State Highway Agency

About this bridge

Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic is a prestressed concrete stringer/multi-beam or girder carrying Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic in Ada County, Idaho. It was built in 1968, so it is 57 years old, older 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 24,500 vehicles a day, roughly 4% of them trucks, projected to reach 36,750 by 2042. The structure is 203 ft (61.9 m) long and 76 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSma 7113;CURTIS RD
CrossesI 184B;CURTIS RD Ic
LocationIn Boise;curtis Road
RouteCity Street 7113
CountyAda County
StateIdaho
Coordinates43.61694, -116.25361
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length203 ft (61.9 m)
Longest span61 ft (18.6 m)
Deck width76 ft (23.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,500 (2023)
Projected traffic36,750 by 2042
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 7113;CURTIS RD over I 184B;CURTIS RD Ic built?

It was built in 1968, making it 57 years old in 2025.

What condition is Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic 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 April 2021.

How much traffic does Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic carry?

About 24,500 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic?

The structure is 203 ft (61.9 m) long with a longest span of 61 ft (18.6 m) and a deck 76 ft wide.

Who owns Sma 7113;CURTIS RD over I 184B;CURTIS RD Ic?

It is owned by the State Highway Agency.