As the thread says Teesside I would say in the early 1970s - it looked quite good.
New Shopping Centre (Cleveland)
Lots of new housing estates and developments
Wilton/Teesport /Seal Sands expanding
Airport expanding
New Hotels
Swinging DIscos
Low unemployment
New muncipal facilities such as Billingham Forum, Berwick Hills and Eston Baths
A19 and A174 Parkway under contruction
People might say unemployment was starting to increase, shipyards were starting to struggle, Cargo Fleet furnaces were closed, Ironmasters was cleared and Cannon Street area was an eyesore, Middlesbrough Dock area was declining. Pollution was bad. Higher education hardly existed, theatres and cinemas were closing.
In relative times the great era was the mid Victorian era from around 1850 to 1873 the local iron industry absolutely boomed - demand was very high from the new railway industry, construction industry and iron clad ships. 100s of Ironstone mines opened up. A local chemcials industry began. People came in their tens of thousands from all over the British Isles for work and to serve the new workers. A relatively unpopulated area, suddenly became an urban area. It was the Qatar of its time.