Woodnook water is labeled as such on the other side of dual carriageway on the right as you go uphill from rising bridge. Area called Stone fold, it from there run's downhill past rising bridge pub to small body of water, small gap to 2 small res's then stream run's down old railway line until it goes underground at woodnook, There are several area's where a river is shown in the town but to trace it path would need a lot of people and little floating clues
There is another stream(Wham's brook) running from oswaldtwistle to foxhill bank/ alleytroyds and then disapear's again presumably to join "woodnook water" and emerge as Sparky said near Rishton as Hyndbrook brook?
The real interesting bit is where the water goes underground
At springhill where we used to live the manhole cover near our house had a "stream" going under it all the time...One day after heavy rain the pipe carrying the stream got more than it could cope and popped a few of the manhole covers out and lifted the pavement 6inch's outside our house.
This makes good reading I am going back to the map