Iron County, UT

70 public highway bridges

Iron County Bridge Snapshot

Iron County, Utah contains 70 public highway bridges in the FHWA National Bridge Inventory. Roughly 5.7% are rated “Good,” 47.1% “Fair,” 1.4% “Poor,” and 1.4% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in UT are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

70
Total Bridges
5.7%
Good
1.4%
Poor
1.4%
Structurally Deficient

Condition Distribution

Good
5.7% (4)
Fair
47.1% (33)
Poor
1.4% (1)
SD
1.4% (1)

All Bridges (70)

RD.TO HAMILTON FT.

Unknown

Over: I-15 (SR-15) NBL & SBL

2.6 MI. SO. of CEDAR CITY, Iron, UT

Built 1967 ADT: 23,880

SR-143

Unknown

Over: I-15 (SR-15) NBL AND SBL

SO.PAROWAN INTERCHANGE, Iron, UT

Built 1973 ADT: 21,585

SR-274 INT. X-ROAD

Unknown

Over: I-15 (SR-15) NBL & SBL

NORTH PAROWAN INTERCHANGE, Iron, UT

Built 1973 ADT: 18,610

SR-271,INT. X-ROAD

Unknown

Over: I-15 (SR-15) NBL & SBL

PARAGONAH INTERCHANGE, Iron, UT

Built 1975 ADT: 18,265

CENTER STREET

Unknown

Over: I-15 (SR-15) NBL AND SBL

IN CEDAR CITY, Iron, UT

Built 1968 ADT: 24,835

CO.RD.-BUCKHORN FL

Unknown

Over: I-15 (SR-15) NBL & SBL

7.6 MI.NO.PARAGONAH INTER, Iron, UT

Built 1979 ADT: 18,190

SR-20, INT.X-ROAD

Unknown

Over: I-15 (SR-15) NBL & SBL

BEAR VALLEY INTERCHANGE, Iron, UT

Built 1979 ADT: 18,190

SR-130, INT.X-ROAD

Unknown

Over: I-15 (SR-15)

NORTH CEDAR INTERCHANGE, Iron, UT

Built 2002 ADT: 24,335

County Road

Unknown

Over: I-15 (SR-15) NBL & SBL

4.2 Mi. N.of New Harmony, Iron, UT

Built 1966 ADT: 23,085

I-15(SR-15)NB, SB

Unknown

Over: CO.RD.TO KANES SPRING

3.2 MI.NO.SO.PAROWAN INT, Iron, UT

Built 1974

CO.RD.INTER X-ROAD

Unknown

Over: I-15 (SR-15) NBL AND SBL

SUMMIT INTERCHANGE, Iron, UT

Built 1970 ADT: 21,585

600 SOUTH STREET

Unknown

Over: I-15 (SR-15)

IN CEDAR CITY, Iron, UT

Built 1968 ADT: 24,835

COUNTY RD.INT.X-RD

Unknown

Over: I-15 (SR-15) NBL & S

FREMONT INTERCHANGE, Iron, UT

Built 1984 ADT: 18,840

CO.RD.-BIG FIELDS

Unknown

Over: I-15 (SR-15) NBL AND SBL

2.1 MI.NO.NO.PAROWAN INT., Iron, UT

Built 1973 ADT: 18,265

I-15 (SR-15) NBL

Unknown

Over: CO RD TO KANARRAVILLE

NO KANARRAVILLE INTERCHG., Iron, UT

Built 1966 ADT: 475

I-15 (SR-15) NBL

Unknown

Over: COUNTY ROAD-NO. FIELD

2.2 MI.NO.CEDAR CITY INT., Iron, UT

Built 1968

I-15 (SR-15) NBL

Unknown

Over: 560 NORTH STREET & U

0.7 MI.NO.CEDAR CITY INT., Iron, UT

Built 1968 ADT: 1,387

I-15 (SR-15) NBL

Unknown

Over: SR-56,200 NORTH STREET

CEDAR CITY INTERCHANGE, Iron, UT

Built 1968 ADT: 11,510

I-15 (SR-15) NBL

Unknown

Over: CITY ST. & INT. X-RO

SOUTH CEDAR CITY INTCHG., Iron, UT

Built 1967

I-15 (SR-15) NBL

Unknown

Over: CO. RD. TO PAROWAN GAP

1.5 MI.NO.SO.PAROWAN INT., Iron, UT

Built 1973

I-15 (SR-15) NBL

Unknown

Over: CO.RD. N. OF SUMMIT Int.

0.7 MI.NO.SUMMIT INTERCHG, Iron, UT

Built 1973

SR-130 SBL ONLY

Unknown

Over: I-15 (SR-15) NBL & S

SO CEDAR CITY INTERCHANGE, Iron, UT

Built 1967 ADT: 23,880

I-15 (SR-15) SBL

Unknown

Over: CO RD TO KANARRAVILLE

NO.KANARRAVILLE INTCHG., Iron, UT

Built 1966 ADT: 475

I-15 (SR-15) SBL

Unknown

Over: CITY ST. TO NO. FIELDS

2.2 MI NO CEDAR CITY INT., Iron, UT

Built 1968

I-15 (SR-15) SBL

Unknown

Over: 560 N.

0.7 MI.N.CEDAR CITY INT., Iron, UT

Built 1968

I-15 (SR-15) SBL

Unknown

Over: SR-56,200 NORTH STREET

CEDAR CITY INTERCHANGE, Iron, UT

Built 1968 ADT: 11,510

I-15 (SR-15) SBL

Unknown

Over: CITY ST. , INT. X-ROAD.

SO.CEDAR CITY INTCHG., Iron, UT

Built 1967

I-15 (SR-15) SBL

Unknown

Over: CO. RD. TO PAROWAN GAP

1.5 MI.NO.SO.PAROWAN INT., Iron, UT

Built 1973

I-15 (SR-15) SBL

Unknown

Over: CO.RD. NO.of SUMMIT INT.

0.7 MI.NO.SUMMIT INTCHG., Iron, UT

Built 1973

Coal Creek Road

Unknown

Over: I-15

1 Mi No Cedar City Int, Iron, UT

Built 2021 ADT: 30,000

I-15 NB

Unknown

Over: East Nichols Canyon Road

I-15 NB over E Nichols Rd, Iron, UT

Built 2021 ADT: 500

I-15 SB

Unknown

Over: East Nichols Canyon Road

I-15 SB over E Nichols Rd, Iron, UT

Built 2021 ADT: 500

CITY STREET

Fair

Over: COAL CREEK

1 MILE NW OF CEDAR CITY, Iron, UT

Built 1969 Load: 7.5 t ADT: 3,872

PAROWAN MAIN ST.

Fair

Over: PAROWAN CREEK

SOUTH END PAROWAN MAIN ST, Iron, UT

Built 1925 Load: 19.1 t ADT: 725

CNTY.ROAD-FAS# 370

Fair

Over: BIG HOLLOW WASH

1.8 MI.SO. OF WECCO PLANT, Iron, UT

Built 1989 Load: 19.8 t ADT: 1,374

WINDING ROAD

Fair

Over: LITTLE CREEK

NO DATA ENTERED, Iron, UT

Built 1960 Load: 19.8 t ADT: 50

SR-56

Fair

Over: PINTO WASH

0.6 MI.EAST OF NEWCASTLE, Iron, UT

Built 1949 Load: 20.7 t ADT: 2,170

COUNTY ROAD

Fair

Over: NEW CASTLE CREEK

300 E. 100 N., NEW CASTLE, Iron, UT

Built 2002 Load: 24.6 t ADT: 378

SR-14

Fair

Over: ROCKY CANYON WASH

3.5 MI EAST CEDAR CITY, Iron, UT

Built 1950 Load: 26.6 t ADT: 2,890

SR-14

Fair

Over: SALT CREEK

2.1 MILES EAST CEDAR CITY, Iron, UT

Built 1950 Load: 26.9 t ADT: 2,890

SR-130

Fair

Over: COAL CREEK & WALKWAY

NORTH SIDE OF CEDAR CITY, Iron, UT

Built 1951 Load: 27.2 t ADT: 22,672

Airport Rd

Fair

Over: Coal Creek

N. Airport Rd., Iron, UT

Built 2007 Load: 27.5 t ADT: 7,759

I-15 (SR-15) NBL

Fair

Over: COAL CREEK

1.1 MI.NO.CEDAR CITY INT., Iron, UT

Built 1968 Load: 27.5 t ADT: 35,682

I-15 (SR-15) SBL

Fair

Over: COAL CREEK

1.1 MI.NO.CEDAR CITY INT., Iron, UT

Built 1968 Load: 28.5 t ADT: 35,682

COUNTY ROAD

Fair

Over: FREMONT WASH

0.5 MI.NO.BEAR VALLEY INT, Iron, UT

Built 1939 Load: 29.5 t ADT: 7

CO. RD.NW KANARRAV

Fair

Over: I-15 (SR-15) NBL & SBL

5.5 MI.NO.NEW HARMONY INT, Iron, UT

Built 1987 Load: 29.5 t ADT: 2,000

SR-56

Fair

Over: UNION PACIFIC RAILROAD

0.5 MI.EAST OF MODENA, Iron, UT

Built 1959 Load: 29.8 t ADT: 1,016

I-15 (SR-15)NB&SB

Fair

Over: KANARRA CREEK

3.5 MI.N.NEW HARMONY INt, Iron, UT

Built 1966 Load: 30.1 t ADT: 33,319

COUNTY ROAD

Fair

Over: COAL CREEK

RIGHT HAND FORK CANYON, Iron, UT

Built 1995 Load: 32.4 t ADT: 77

Paint Shop Rd

Fair

Over: Coal Creek

Paint Shop Rd, Iron, UT

Built 1987 Load: 32.4 t ADT: 50

Read our methodology — how this data is sourced, computed, and verified.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial