So, I'll admit, I'm going back through scanning the comments from the top, and I came across one talking about conduit/utility color.
Locate mark colors Are regulated (here), orange=telecom; blue=water; green=sewer; yellow=gas/fuel; red=power; purple=reclaimed/raw water, ect. However; conduit color is Not regulated. There is absolutely fiber/telecoms in yellow/orange/green/black/grey conduit. Most times green pipe is sewage and blue is water, But I have absolutely seen blue foremain. Gas, yellow PE is common for small stuff, but direct bury steel is now green epoxy coat steal, and drilled is generally a brown epoxy coating; But old steel was often/is often a black "bark" of asphalt and asbestos wrap. Some of the old gas stuff was a pinkish orange, and there was a type that was a gray-orange. Most ATT was for years 2 or 4" grey PE, but they have started using more and more 3" black PE conduit.
We were looking at a DBC copper (direct buried cable) in conflict with a signal pole. It was supposed to be a 1200 pair. Anyways, while 4 or 5 of us were trying to come up with a plan, a laborer came up with a Sawzall. We asked him what he was doing. "Foreman sent me to window the pipe". We told him, that's Copper, not pipe. He laughed and said that's pipe, there isn't 4" diameter cable.... We did stop him, but yes, it was a 4" OD cable, turned out it was a 2000 pr.
We currently have a rural fiber to house, stimulus job, that they are using 2" green PE for fiber. Not a "problem" , but everyone's first assumption on finding a 2" green poly is a sewer service