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Every bridge in Slope County, North Dakota

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

43 inventoried bridges, busiest first

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

Slope County, North Dakota, has 43 bridges in the 2025 National Bridge Inventory: 36 rated good, 7 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
US Highway 85 over Creek	1991	1,080	Good
US Highway 85 over Branch-cannonball River	1963	1,010	Good
US Highway 85 over Philbrick Creek	1937	920	Good
US Highway 12 over Little Missouri River	1950	580	Fair
US Highway 12 over Bnrr Separation	1984	561	Good
US Highway 12 over Little Beaver Creek	1987	520	Good
US Highway 12 over Branch of Beaver Creek	1950	510	Fair
Nd Highway 21 over Creek	2021	507	Good
Nd Highway 21 over Creek	2021	507	Good
Nd Highway 21 over Creek	2021	507	Good
Nd Highway 21 over Creek	2021	440	Good
Nd Highway 21 over Cannonball River	1983	350	Good
172ND Ave SW over Beaver Creek	1955	200	Fair
US Highway 67 over North Fork Cedar Creek	1952	180	Good
54TH St SW over Philbrick Creek	1986	100	Good
County Highway over Cannonball Creek	2012	100	Good
County Highway over Trib of Cannonball River	2000	100	Good
County Highway over Trib of Cannonball River	2000	100	Fair
Old highway 16 over Creek	2010	100	Good
126TH Ave SW over Cannonball River	1991	65	Good
64TH St SW over Deep Creek	1984	60	Good
County Highway over Creek	1984	60	Good
County Highway over Sand Creek	1983	60	Good
128TH Ave SW over N. Fork Cedar Creek	1990	50	Good
130TH Ave SW over North Fork Cedar Creek	1993	50	Good
71ST St SW over Chanta Peta Creek	1985	50	Good
76TH St SW over North Fork Cedar Creek	1988	50	Good
76TH Street SW over Deep Creek	1987	50	Good
149TH Ave. SW over Deep Creek	1993	45	Good
County Highway over Creek	2016	45	Good
County Highway over N. Fork Cedar Creek	1995	35	Good
East River Road over First Creek	1985	35	Good
128TH Ave SW over N. Fork Cannonball River	1983	26	Good
58TH St SW over Deep Creek	1979	26	Fair
County Highway over Chanta Peta Creek	2016	26	Good
County Highway over N. Fork Cedar Creek	2016	26	Good
70TH St SW over N Fork Cedar Creek	1977	25	Good
East River Road over Sand Creek	2016	25	Good
132ND Ave SW over N. Fork Cannonball River	1998	24	Good
County Highway over N Fork Cannonball River	1992	24	Good
154TH Ave SW over West Fork Deep Creek	1985	20	Good
59th Street SW over Little Missouri River	2002	20	Fair
145TH Ave SW over Creek	1933	10	Fair

Source: FHWA National Bridge Inventory, 2025.

Slope County bridge conditions · North Dakota bridges by county.

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