There were steep gradients on the line; from Seghill to Prospect Hill rising as steep as 1 in 61, and from Prospect Hill to the Tyne falling gradients, the steepest of which was 1 in 25. The line was worked mainly by stationary engines, one at Prospect Hill, near the Allotment, which hauled up the loaded wagons from Holywell, and the empty wagons from the Newcastle and North Shields road. The other engine was at Percy Main, hauling the empty wagons from the staiths. From Prospect Hill to Percy Main and from Percy Main to the staiths the loaded wagons ran by gravity, unwinding as they descended a tail rope from the drum of the engine, to bring hack the empty wagons. The remainder of the line from Seghill to Holywell was worked by locomotives; those used at first were the Samson and the John, both built by Timothy Hackworth.