US Bridges

Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl

Poor

Beaver County, Utah · Manderfield Interchange · Structure no. 0D 700

Built
1964
61 years old
Condition
Poor
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
221 ft
4 main spans
Daily traffic
102
2021 count
Owner
State
State Highway Agency

About this bridge

Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl is a concrete continuous tee beam carrying Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl in Beaver County, Utah. It was built in 1964, so it is 61 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 102 vehicles a day, roughly 27% of them trucks, projected to reach 122 by 2041. The structure is 221 ft (67.5 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCo. Rd. Inter X-Rd
CrossesI-15 (SR-15) Nbl and Sbl
LocationManderfield Interchange
RouteCounty Highway 1016
StateUtah
Coordinates38.41278, -112.6525
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating73.2 US tons
Inventory rating53.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length221 ft (67.5 m)
Longest span70 ft (21.2 m)
Deck width32 ft (9.9 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102 (2021)
Projected traffic122 by 2041
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl built?

It was built in 1964, making it 61 years old in 2025.

What condition is Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2023.

How much traffic does Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl carry?

About 102 vehicles per day (2021 count), of which roughly 27% are trucks.

How long is Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl?

The structure is 221 ft (67.5 m) long with a longest span of 70 ft (21.2 m) and a deck 32 ft wide.

Who owns Co. Rd. Inter X-Rd over I-15 (SR-15) Nbl and Sbl?

It is owned by the State Highway Agency.