Bridge conditions in Matanuska-Susitna Borough, Alaska
121 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 121 bridges in Matanuska-Susitna Borough: 60 rated good, 53 fair, and 8 poor.
- 8 of the 121 bridges in Matanuska-Susitna Borough, Alaska, are rated in poor condition (6.6%) in the 2025 National Bridge Inventory, as of .
- 60 bridges (49.6%) are rated good and 53 (43.8%) fair.
- The median Matanuska-Susitna Borough bridge was built in 2002.
- The busiest poor-rated bridge is Parks Highway over Hardage Creek (built 1971), carrying about 940 vehicles a day.
Good 49.6% · Fair 43.8% · Poor 6.6% of 121 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 |
|---|---|---|---|
| Parks Highway over Hardage Creek | 1971 | 940 | Poor |
| Willow/fishhook Rd over Willow Creek | 1975 | 190 | Poor |
| Petersville Road over Moose Creek | 1974 | 160 | Poor |
| Denali Highway over Susitna River | 1956 | 60 | Poor |
| Back Acres Road over Bodenburg Creek | 2002 | 30 | Poor |
| Elk Road over Bodenburg Creek | 2002 | 10 | Poor |
| Oil Well Road over Moose Creek | 1998 | 10 | Poor |
| Grubstake-hatchers over Willow Creek | 1945 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Parks Highway over Seward Meridian U.c. | 2005 | 32,100 | Good |
| Glenn Highway over Knik River Access U.c. | 1993 | 26,600 | Good |
| Palmer-wasill Ext over Cottonwood Overhead | 2002 | 14,000 | Fair |
| Glenn Highway over Matanuska Riv Northbound | 1965 | 13,300 | Fair |
| Glenn Highway over Knik Riv. Overflow S.B. | 1993 | 13,300 | Fair |
| Glenn Highway over Knik Riv. Overflow N.B. | 1993 | 13,300 | Fair |
| Glenn Highway over Matanuska Riv Southbound | 1993 | 13,300 | Fair |
| Parks Highway over Wasilla CR Southbound | 2002 | 13,200 | Fair |
| Parks Highway over Wasilla CR Northbound | 2002 | 13,200 | Good |
| Parks Highway over Hyer Rd Uc Southbound | 2002 | 13,200 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Alaska: Alaska 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.