A view of Darlington Road, Hartburn after the demolition of the Hartburn Bridge. c1960 
Picture Stockton Archive
A Pictorial History of Stockton-on-Tees
A view of Darlington Road, Hartburn after the demolition of the Hartburn Bridge. c1960
The bridge was demolished in 1970 according to this entry. http://picture.stockton.gov.uk/photos/t6260-6262.aspx
Mike Shingleton – Mike if memory serves slightly earlier than that. I left Stockton in 1974 & it was already down by then. Only just mind you! When we bought our first house, on Coxwold Rd, you could still walk the old track bed to the pits behind Head Wrightson”s, on Yarm Rd, without having to descend to cross Darlington Rd.
Surely this wasn’t before 1960 as the milk cup cycle riders went under it in 1966?
This bridge was demolished some time in the mid-1970″s if I recall correctly.