Complex sentence: Tulsi Lake was built over the river Tasso by 1879.the plan for Tulsi lake was laid in 1872-79 by creating a dam and redirecting river Tasso into Vihar lake at a cost of Rs 40 lakh.
Split into simpler sentences: Tulsi Lake was built over the river Tasso by 1879. The plan for Tulsi lake was laid in 1872-79 by creating a dam and redirecting river Tasso into Vihar Lake at a cost of Rs 40 lakh.