 The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales.The James St Underbridge has historical significance as the second oldest stone arch railway bridge in New South Wales still in use, and as one of the only original Whitton-era bridges still in use along the Main West Line.The place has a strong or special association with a person, or group of persons, of importance of cultural or natural history of New South Wales's history.