This area is well known to me as I used to hunt there in the good old days when it was permissible to do so.
We confined our hunts to the winter (as per the law) and we never, repeat never saw any snakes despite traversing terrain that would normally be full of them - nor did our dogs ever encounter them despite sticking their noses into every bush!!
My point is that if you wish to fish or traverse the area, winter (Dec.-March)
is the perfect time .
Thats great you hunted there unfortunately now that entire are is being taken over by land mafia the forest is pretty much going to be gone a high way is being built from Kurali Mulapur to Baddi the land prices due to this highway and Chandigarh proximity are through the roof. Know it because have family who live there. Snakes was mentioned by friends who drive frequently through there to Baddi and encountered snakes sunning a lot. Funny thing due to safety concerns they never drive back at night on that road. When I drove by it saw quite a few birds Kingfishers, et al at the dam.
Also there is another check dam Mirzapur little further or West off this dam. Enjoy the place folks they will be gone soon...