I drove out to the dam on the Marabasco river behind Cihuatlan the other day as some friends were spending the afternoon cooling off in the river on someones birthday. Turns out they were there but on the other side of the river and I didn't feel like a crossing the "spillway" adventure so I missed them.
The dam creates irrigation ditches on either side of the valley, one for Colima and one for Jalisco. Along the canals well past Cihuatlan are a number of very basic housing situations that grabbed my attention on the way back. Some of the most basic housing I have seen in Mexico.
They have a bridge over to the road