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Every bridge in Cassia County, Idaho

Name: Every bridge in Cassia County, Idaho
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

117 inventoried bridges, busiest first

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Cassia County, Idaho, has 117 bridges in the 2025 National Bridge Inventory: 24 rated good, 93 fair, and 0 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
I 84B over Snake River;overland Br	2001	26,000	Fair
I 86 Ebl over I 84 Wbl	2020	19,000	Good
I 84B Sbl over Snake River;heyburn Br.	1977	17,000	Fair
I 84B Nbl over Snake River;heyburn Br.	1955	15,000	Fair
SH 77 over Canal	1985	13,000	Fair
I 84 over Co.rd.;horse Butte Gs	1963	11,500	Fair
I 84 over Juniper Rd;gs NO.1	1968	11,000	Fair
I 84 over Juniper Rd;gs NO.2	1968	11,000	Fair
I 84 over Meadow Creek	1968	11,000	Fair
I 84 Ebl over 1250 E Gs	1960	9,500	Good
I 84 Ebl over Southside Canal	1960	9,500	Fair
I 84 Wbl over 1250 E Gs	1960	9,500	Fair
I 84 Wbl over Southside Canal	1960	9,500	Fair
I 84 Ebl over Raft River	1973	5,750	Fair
I 84 Wbl over Raft River	1967	5,750	Fair
I 84 Ebl over Co.rd.;gs NO.3	1968	5,500	Fair
I 84 Ebl over Co.rd.;gs NO.4	1968	5,500	Fair
I 84 Wbl over Co.rd.;gs NO.3	1968	5,500	Fair
I 84 Wbl over Co.rd.;gs NO.4	1968	5,500	Fair
SH 77 over Marsh Creek	1960	4,900	Fair
I 86 Ebl over County Rd;old US 30N Gs	1960	3,850	Fair
I 86 Ebl over Farm Rd;machine Pass Gs	1960	3,850	Fair
I 86 Ebl over Raft River	2019	3,850	Fair
I 86 Ebl over Yale Road;raft River Ic	1960	3,850	Fair
I 86 Wbl over County Rd;old US 30N Gs	1960	3,850	Fair
I 86 Wbl over Farm Rd;machine Pass Gs	1960	3,850	Fair
I 86 Wbl over Raft River	2019	3,850	Good
I 86 Wbl over Yale Road;raft River Ic	1960	3,850	Fair
SH 81 over G Canal	2013	3,400	Good
SH 25 over I 84;rupert-declo Ic	1960	3,200	Fair
SH 77 over F Canal	1960	3,200	Fair
SH 77 over G Canal	1950	3,200	Fair
Stc 7552;PARK Ave over G Canal	1983	2,800	Fair
STC7632;HILAND Ave over G Canal	1973	2,700	Fair
SH 81 over Marsh Creek	2013	2,600	Fair
SH 77 over Canal	1985	2,500	Fair
STC2839;500 South over J Canal	1975	1,800	Fair
Idahome Road over I 84 Eb-wb;idahome Rd Gs	1967	1,700	Fair
SH 81B Spur over I 84;malta-yale Rd Ic	1963	1,600	Fair
SH 81 over H Canal	2006	1,500	Fair
Stc 2834;400 S Rd over J Canal	1989	1,500	Fair
Stc 2838;250 East over G Canal (unity Br)	2006	1,500	Fair
E 100 S over G Canal	1975	1,400	Fair
E 100 S over G Canal;e.burley Br	1976	1,400	Fair
SH 81 over J Canal	2006	1,300	Fair
S 400 W over G Canal	1994	1,000	Good
Stc 4698;E 600 N over Southside Canal	1998	720	Fair
W 1000 S over Big Cottonwood Creek	1970	710	Fair
Heglar Canyon Rd over Heglar Drain	1984	630	Fair
STC2739;ROCK CR Rd over Rock Creek	1971	600	Good
STC2739;ROCK CR Rd over Rock Creek;shoe Cr.br.	1971	600	Fair
300 North Road over Main Southside Canal	1976	480	Fair
50 West Road over H Canal	1989	480	Fair
S 100 W over H Canal	1983	430	Fair
I 86 WB Ramp over I 84	2020	400	Good
East Main Street over East Canal	2020	360	Good
W 200 South Road over J Canal	1977	360	Fair
Sublett Road over I 84 Eb-wb;sublett Rd Ic	1967	300	Fair
S 1200 W over Milner Main Canal	2021	280	Good
S 50 W Pole Ln Rd over J Canal	1990	270	Good
100 South Road over G Canal	1989	250	Fair
350 East Road over G Canal	1986	250	Good
STC4693;S 550 E over H Canal	2004	210	Fair
150 East Road over G Canal	2001	200	Fair
200 South Road over G Canal	1988	200	Fair
200 South Road over G Canal	1988	200	Good
500 West over East Canal	1952	200	Fair
950 East Road over Main Southside Canal	2008	200	Fair
Reid Spring Road over Raft River	2001	200	Fair
400 South Road over H Canal	1975	170	Fair
400 South Road over H Canal	1983	170	Fair
400 South Road over J Canal;sw Declo Br	1978	170	Fair
350 East Road over H Canal	1976	160	Fair
200 South Road over H Canal;se.burley	1972	120	Fair
200 South Road over J Canal	1984	120	Fair
00 South 832 East over G Canal	2024	100	Good
100 South Road over H Canal;e.declo Br	1985	100	Fair
1050 East Road over H Canal	1974	100	Fair
1100 East Road over J Canal;se.declo Br	1972	100	Fair
150 East Road over J Canal	1996	100	Good
250 East Road over J Canal	1974	100	Fair
300 South Road over H Canal;sw.declo Br	1973	100	Fair
300 South Road over J Canal;se.declo Br	1975	100	Fair
450 East Road over H Canal	1974	100	Fair
50 East Road over J Canal;se.burley Br	1975	100	Fair
500 South Road over J Canal	1970	100	Fair
500n-1130e over Main Southside Canal	1981	100	Fair
550 East Road over J Canal	1973	100	Fair
600 South Road over J Canal	1976	100	Fair
600 South Road over J Canal	1973	100	Fair
648 N 1250 E over Main Southside Canal	2011	100	Good
650 East Road over G Canal	2005	100	Fair
650 East Road over J Canal	1975	100	Fair
750 East Road over H Canal	1973	100	Fair
750 East Road over J Canal	1977	100	Fair
950 East Road over H Canal	2009	100	Fair
950 East Road over J Canal	2015	100	Fair
950 East Road over Main South Side Canal	1992	100	Fair
Baseline Road over Raft River	2019	100	Good
E. 100 S. over Marsh Creek	1999	100	Fair
650 East Road over H Canal	2022	90	Good
Main STREET(100 S) over Marsh Creek	1981	80	Fair
450 East Road over J Canal	1978	70	Fair
Stc 2842;E Ey Road over Raft River	2001	60	Fair
2950 East Rd over Heglar Drain	2003	50	Fair
790n-1350e over Main Southside Canal	1980	50	Fair
Beet Dump Road over I 84 Eb-wb;cotterell Gs	1967	50	Fair
Fdr over Rock Creek	2024	50	Good
S 2750 E over Heglar Drain	1990	50	Good
Stc 2842;E Ey Road over Raft River	2014	50	Good
Hwy 81 Bypass over J Canal	1986	40	Fair
County Road over I 84 Eb-wb;sweetzer Ic	1968	30	Fair
S 1050 E Rd over J Canal	2000	30	Good
S 350 E Rd over J Canal	2000	30	Good
Wilson Ave over East Canal	2011	30	Good
2200 S Road over West Canal	2023	20	Good
Dam Road over East Canal	2015	20	Fair

Source: FHWA National Bridge Inventory, 2025.

Cassia County bridge conditions · Idaho bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.