Home › Virginia › Arlington County › Custis Mempkwy I66 over Route 124 and Sp

Custis Mempkwy I66 over Route 124 and Spout Run

Arlington County, Virginia · rated Fair in the 2025 National Bridge Inventory

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

Custis Mempkwy I66 over Route 124 and Spout Run in Arlington County, Virginia, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1981, making it 44 years old at the 2025 inventory.
It carries about 82,000 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 152 of the 183 inventoried bridges in Arlington County rated fair (83.1%); 6 (3.3%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 539 ft
Location	00.30fr29s/ 00.57to29n
NBI structure number	000000000000191
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-395 SB over Potomac River & Ohio Dr.	1960	178,242	Fair
H.g.shirley Mem Hy over Glebe Road (route 120)	1973	176,778	Fair
Shirley Mem.hwy. over I-395 (ramp G)	1973	176,778	Fair
Shirley Hwy Ar Nvy over Long Branch	1973	176,778	Fair
Shirley Mem.hiway over Boundary Channel Drive	1950	126,751	Fair
395 Express Lanes over Eads St. & Express Ramp	1976	126,751	Fair