Below are some pictures of making a trowongan to open a dam to be in mamfaat by the surrounding community to build electric power machinery and water reservoir to avoid the flood disaster sekala regency north.
well this is a stream of water or trowongan, its function is to prevent flood disaster so that water does not spontaneously flow to remote part of village.
this is also the location or land for dam builders.
here's a glimpse of the second largest dam or dam in Asia.