The drain and the steps overflowed frequently during the last 3000 years from the repeated floods in the valley below Chorabari-glacier.
A greatly-revered temple, built before the little-ice-age is located in the valley. It remained submerged in the glacier for at least 400 years and survived. Flash-floods in June, 2013 swept away all except the temple (5700 dead, >100,000 evacuated).
The locals believe that Lord-Shiva moved the hills 12,000 feet above land to deny the Pandavas* a darshan**. Nobody knows how high Shiva raised the temple to escape the flood waters.
The Kedar-temple reopened for pilgrimage in May 2014.
**Darshan ~ A view of the divine.
*Pandavas ~ A clan of Mahabharat time.
Thanks for the prompt Rochelle Wisoff-Fields. SHALOM.