Green Brook, Lancashire  Green Brook is a minor river in Lancashire, England. It is long and including tributaries has a catchment area of . Green Brook begins at the confluence of Hapton Clough and Habergham Clough in Spa Wood next to Burnley's cemetery. Hapton Clough is the product of Thorny Bank Clough and Tower Brook which meet near Old Barn Farm in Hapton. While Habergham Clough begins at the confluence of New Barn Clough and Micklehurst Clough near Iron House Farm in Habergham Eaves. From Spa Wood, Green Brook heads north into a tunnel which passes under the A679 Accrington Road, the Leeds and Liverpool Canal, the East Lancashire railway line and the M65 motorway to emerge at Lowerhouse Lodges. In Lowerhouse it collects Sweet Clough and turns west into Padiham where it collects Shaw Brook and then continues northwest, flowing into the River Calder in the centre of the town.