Dehradun, May 21 -- Voices of concern are emerging from many sections of society about the viability of the proposed 'elevated roads' over the Rispana and Bindal Rivers in Dehradun. The impact of the project on the environment and the health of the rivers is a primary worry, as these are central to the valley's ecosystem. Much of the groundwater recharge is from these rivers at a time when most of the traditional streams, rivulets and canals have dried up or been closed for various types of 'development'. Dehradun already suffers from shortage of drinking water supply because the Jal Nigam sources it from tubewells whose ground water levels are dropping rapidly. Projects to obtain water from perennial rivers languish or have become unviable...