US Bridges

STC3730;MARSING RD over Mora Canal

Good

Canyon County, Idaho · 2.2 S 9.0 W Nampa · Structure no. 000000000027366

Built
2004
21 years old
Condition
Good
inspected February 2024
Type
Frame
Concrete
Length
20 ft
1 main span
Daily traffic
980
2023 count
Owner
Local
Other Local Agency

About this bridge

STC3730;MARSING RD over Mora Canal is a concrete frame carrying STC3730;MARSING RD over Mora Canal in Canyon County, Idaho. It was built in 2004, so it is 21 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 980 vehicles a day, roughly 9% of them trucks, projected to reach 1,470 by 2042. The structure is 20 ft (6.2 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSTC3730;MARSING RD
CrossesMora Canal
Location2.2 S 9.0 W Nampa
RouteCounty Highway 3730
StateIdaho
Coordinates43.54528, -116.7451
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic980 (2023)
Projected traffic1,470 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was STC3730;MARSING RD over Mora Canal built?

It was built in 2004, making it 21 years old in 2025.

What condition is STC3730;MARSING RD over Mora Canal 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 February 2024.

How much traffic does STC3730;MARSING RD over Mora Canal carry?

About 980 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is STC3730;MARSING RD over Mora Canal?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m) and a deck 50 ft wide.

Who owns STC3730;MARSING RD over Mora Canal?

It is owned by the Other Local Agency.