Based on on-site surveying. It appears to be intermittent and small, mostly manifesting as a persistent muddy area on and right above the trail. Last time I noticed mud on the trail right here was early June and it has been dry since. I come past here regularly and will watch to see when it comes back after the fall rains begin.

The spelling is correct. I don’t know how it came to have two p’s, but it does. Older topo maps also have the hill it’s named for as Tripple.

I marked this as farmland because that piece of land (along with some others on residential properties) are primarily used as pasture for a small number of cows.

When this part of Kennewick was annexed, a few families had farm animals and those who did were allowed to continue using their property as pasture.