You could, in theory, go through the entirety of the utility network and attribute each valve and their associated lines and even service connections with some sort of "isolation zone" value. Once the attribution is set you could set up a select widget with some message actions using the basic AGOL ExB to select by attribute where the lines and/or service connections "isolation zone" contains the value for your valve. In this scenario, each of your lines and service connection would likely have multiple isolation zone values. This would arise from situations where you have say a 6" main that has a gate valve, then tees into two directions that have their own separate gate valves. Anything down stream of the tee would effectively be in the isolation zone for the original 6" main and then whichever valve from the tee.
TL,DR; yes you could do it. yes it would take a lot of time (depending on how large/convoluted your system is)
- GIS Manager at a water utility
