Tilaiya Dam was the first dam and Hydro-Electric power station constructed by Damodar Valley Corporation across the Barakar River, at Tilaiya in Koderma, Jharkhand.

Tilaiya Dam is 1200 ft long and 99 ft high situated in an ideal surrounding with a beautiful reservoir in 36 sq km area. Built with the main object of controlling floods. Tilaiya Dam was inaugurated on 21 February 1953. It has a power generation capacity of 2 x 2 MW.

The beautiful natural surroundings are the attraction to tourists. The main (Patna-Ranchi) road from Barhi on Grand Trunk Road passing through hills overlooking the reservoir is picturesque.