11870b5d_oric_Significance_Rating__HSR___Description
[HSR] 5 [Examples] Traditional riveted truss bridges with average or below integrity, and small pin-connected truss bridges with no unusual details or early construction date. Movable plate girders. Concrete arch bridges with good historic integrity. [Description] 
These are bridges are essentially the most common of the rare bridge types. Standard and traditional bridge designs are prevalent at this level. Bridges in this category clearly have historic value, yet are often facing demolition, and being assessed as non-historic.
HistoricBridges.org - Historic Significance Rating (HSR)
Description