Black Brook (River Yarrow)

Black Brook
The Black Brook to the east of Chorley
Data
location	Lancashire , England
River system	River Ribble
Drain over	River Yarrow  → River Ribble  → Irish Sea
River basin district	North West
source	northeast of Great Knowley 53 ° 40 ′ 37 ″  N , 2 ° 36 ′ 22 ″  W
muzzle	in the River Yarrow Coordinates: 53 ° 38 ′ 28 "  N , 2 ° 37 ′ 7"  W 53 ° 38 ′ 28 "  N , 2 ° 37 ′ 7"  W

The Black Brook is a watercourse in Lancashire , England . It arises northeast of Great Knowley and flows south to its confluence with the River Yarrow near the Yarrow Bridge in the south of Chorley .