The Limey Water runs through Rossendale in a series of stone and concrete culverts.
A new storm relief complex in Trafford Park, 3 detention tanks and 700m of sewer were built to stop frequent spills to the Ship Canal.
A couple of large shafts linked by tunnels to the Eccles Sewage Works then onto an outfall at the Manchester Ship Canal. The system will intercept spills that used to end up in the Salt Eye Brook for storage and treatment or screening and dumping in the larger river.
In the hills above Dovestone Reservoir this culvert was built to divert the water of the Greenfield brook.
Solicitor is a culvert of the Eaves brook that flows through Preston. It's around 900m long and joins with the Savick Book straight after the outfall.
The Holcombe Brook drops underground in a couple of culverts, the first of which is around 280m long and features several waterfalls and cascades.
The Walshaw Brook emerges briefly into the open air from Slop Pail before returning underground for the last stretch to the River Irwell