We just bought a bungalow in Portage in January (first home ever!) and just yesterday had a chance to dig around in the backyard after some of the snow melted. We were trying to locate the sprinkler system and, after brushing away just a bit of dirt and mulch chips, we found a lid marked 'sewer'. I was trying to find info on how the system is set up and came across this forum. So, while I can't answer Matthew's question, can anyone answer mine? I thought the water and sewer pipes ran out front to the road. What's being held in that tank in my yard? If it's a grease trap would it be marked 'sewer'? It's right by the base of our house.
Thanks for any help!