Hanna Lake is in the hills close to where the Urak Valley begins 17 kilometres (11 mi) east from Quetta city. The reservoir was constructed in 1894 during the British Colonial era on the land of local tribesmen, and is one of the main attractions in the city and a great historical bridge wall between two mountains the depths like battlements of a fort for storing of water.

There is a lakeside restaurant with picnic tables shaded by pine trees at the end of the river where families can enjoy the food and weather on the eastern part the Hayat Durrani Water Sports Academy (HDWSA) the first and only rowing, canoeing, kayaking and sailing training and championships organising centre in Balochistan Province with provision of rough swimming facility. Hanna Lake is one of the most visited and accessible lakes in Balochistan.

In 1894[citation needed], the small action dam Surrpull (Red Bridge) was constructed on main Urak road to control flood and divert water catastrophically into Hanna Lake coming from the Zarghoon Ghar and Murddar Mountains Koh-i-Murdaar streams, snow melting and rains through its main canal.

Over a century old in 1908, this lake was spread over an area of 818 acres with a holding capacity of over 220 million gallons of water and a depth of 49 feet (15 m).In 1973 [5] a heavy flood destroyed the Murdar Mountains recharge linked canal on the way to Surrpull near Spin Kaarrez road which has not been (Restored) reconstructed till date.

Presently on May 2016 the heavy flood filled this small action dam Surrpull with mud and stones resultantly all the streams and floods water are going waste and there is no chance to regulate water conservancy to Hanna lake without the restoration, Desilting of surrpull and both main canals on the other hand the water level in Hanna Lake is going deadly low hence the natural ecosystem wild life, environment of the surrounding, natives along with hundreds of migrated birds and thousands of fish followed by the future of the athletes of rowing and canoeing are in danger and on conclusion the Hanna Lake will be fully dried like in 1999 to January 2005 and in 2010.

The environmental scientists, Speleologists and the Conservationist are looking the future of the lake in most dangerous condition and the current harmful environment situations will badly affect the natural eco system, environment, underground water level of the surroundings, however the small action dam was locally restored/desalted in February 2019 with the assistance of Hashim Khan Ghalzai secretary P&D and Hayatullah Khan Durrani C.E HDWSA and since the rain flood from Zarghoon mountains are continuously coming to Hanna Lake and the water level has been raised up to 50%.