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Parks Highway over Seward Meridian U.c.

Matanuska-Susitna Borough, Alaska · rated Good in the 2025 National Bridge Inventory

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

Parks Highway over Seward Meridian U.c. in Matanuska-Susitna Borough, Alaska, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 2005, making it 20 years old at the 2025 inventory.
It carries about 32,100 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 60 of the 121 inventoried bridges in Matanuska-Susitna Borough rated good (49.6%); 8 (6.6%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 193 ft
Location	Mile Point 4.2
NBI structure number	1989
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Alaska department of transportation.

Bridge	Built	Vehicles/day	Condition
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