For Directions Check this link:
Chakwāl, Pakistan to Union council office Bheen - Google Maps
For Fishing u have to get Permission. But it's not difficult. It all depends on the owner of the Dam. As i have seen tourists from Islamabad , Pindi region who come to see Fish Farming Dam which has been recently made by our Local Nazim (Choudary Ghzanfar). This Man has also other stuff which tourists like to see like his Dairy Farms, his Fruit Farms, Poultry Farms etc. I have marked the location of that Dam in The above google Map. Dam is located at "D" Point in the google map's link.