Simplify the following text for a Grade 6 native English-speaking person.
Original: The river 's source is at Irwell Springs on Deerplay Moor , approximately 1.5 m north of Bacup , in the parish of Cliviger , Lancashire .
Simplified: The start of the river is at Irwell Springs on Deerplay Moor , about 1.5 m north of the town of Bacup , in the parish of Cliviger , Lancashire .