Bridge conditions in Morton County, North Dakota

269 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory

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

26 of the 269 bridges the federal inventory lists in Morton County are rated poor; the rest split 115 good and 128 fair.

26 of the 269 bridges in Morton County, North Dakota, are rated in poor condition (9.7%) in the 2025 National Bridge Inventory, as of August 20, 2026.
115 bridges (42.8%) are rated good and 128 (47.6%) fair.
The median Morton County bridge was built in 1970.
The busiest poor-rated bridge is Irrsr Nd Hway 1806 over Cannonball River (built 1962), carrying about 1,450 vehicles a day.

Good 42.8% · Fair 47.6% · Poor 9.7% of 269 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
Irrsr Nd Hway 1806 over Cannonball River	1962	1,450	Poor
CR139 over Creek	1960	405	Poor
South Park Street over Branch of Knife River	1916	200	Poor
County Highway 86 over Drainage Area	1968	110	Poor
67TH Ave SW over Drainage Area	1971	85	Poor
CR138 over Drainage Area	1973	75	Poor
County Highway 83 over Creek	1979	45	Poor
County Highway 90 over Drainage Area	1968	40	Poor
33RD St over Wilson Creek	1967	30	Poor
40TH Ave over Creek	1942	30	Poor
34TH St over Drainage Area	1968	25	Poor
58TH Avenue over Drainage Area	1966	25	Poor
34TH Street over Square Butte Creek	1971	25	Poor
22ND Avenue over SE Br Little Heart River	1919	24	Poor
33 1/2 St over Drainage Area	1966	20	Poor
County Highway 87 over Hailstone Creek	1940	20	Poor
45th Ave over Sweet Briar Creek	1922	20	Poor
County Road 82 over Chanta Peta Creek	1919	20	Poor
17TH Ave over NW Br Cantapeta Creek	1971	20	Poor
49 1/2 Avenue over Big Muddy Creek	1940	10	Poor
Judson St. over Creek	1940	10	Poor
38TH St over Drainage Area	1967	5	Poor
31ST St over Hail Storm Creek	1966	5	Poor
58TH Street over SE Br Little Heart River	1971	5	Poor
County Highway over Atv Trail	1960	5	Poor
East Fulton Avenue over Branch of Knife River	1924	–	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Interstate 94 over Missouri River	1965	24,125	Fair
Interstate 194 over Business Loop 94	1981	18,200	Fair
I-94 Business Loop over West Midway Separation	1965	16,750	Fair
Interstate 94 over East Midway Interchange	1965	9,100	Fair
Interstate 194 over Business 94	1981	9,100	Fair
Interstate 194 over Business 94	1981	9,100	Fair
Interstate 94 over Refinery Road Interchang	1964	7,750	Fair
Interstate 94 over Refinery Road Interchang	1964	7,750	Fair
Interstate 94 over Bnrr and Missouri Road	1964	7,750	Fair
Interstate 94 over Bnrr and Missouri Road	1964	7,750	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Morton County → - all 269, busiest first, each with its own condition record.

All of North Dakota: North Dakota bridge conditions by county · every download on the data page.

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