This morning a workman arrived to establish where the "dip" is in the saniatry sewer line at our house and next door. Once more the video camera was sent through the line. This time the results were that the line had collapsed 16 meters from our house beneath the sidewalk. The sidewalk in front of our house is now inscribed with graffitti: "collapse."
Green lines also go to the middle of the road at right angles to that evocative word.
Green lines also decorate my front garden. They compliment the red lines that show where there are buried hydro (electrical) cables.
When the workman finishes checking our neighbour's sanitary sewer line, we may have three excavation sites marked. One for the storm sewer and the needed back-up valve and two for the collapsed sanitary sewer lines. It will look like an archeological dig before it is all over!