The sewer can't handle it. The pipe is okay, but the pipe's not the problem. The sewer is the problem. The sewer cannot handle the volume. The sewer cannot handle what is being put into it. And so, like any good hunk of civilized society, it has decided to fight back. The sewer has stopped up. The sewer has become, for all intents and purposes, a serious health hazard. For those who live or work in the Highlands Ranch portion of the sewer's ambit, it is critical, urgent, and deployment of the problem-resolution team in the sewer's fight against its inhabitants is necessary. You have to pathologize the sewer problem as it works back from a health hazard. What is Health Hazard 1a? Mental health liability. I mean, think about it. You've got a pollution problem, and you are seriously undermining the brain function of every person within nose range.
Highlands Ranch has access to many ways to repair sewers. Their techniques range from old-school digging and replacing to modern methods that do not require as much unfriendly disruption to your property.
If the sewer line damage is extensive or if the traditional repair method is used where the sewer line is too deep to make the other methods reasonable, then this is what you can expect. The repair crew will dig a big trench (bigger than a gravesite) and remove completely and replace your sewer line. And after that, they will fill in the grave.
Repairing a sewer line can be as simple as snaking out a stubborn clog, as aggressive as hydro jetting, or as drastic as digging up the front yard to replace the sewer line. So, the best place to start is with an examination of the nature and extent of the damage. If it's a minor problem in a minor location and the pipes are otherwise sound and up-to-date, hydro jetting can clear the line—fixing it for as long as could be reasonably expected, allowing for the possibility of future clogs. If the problem is severe or the result of combining old materials with modern plumbing techniques (in which case, "upgrading" the sewer line might mean less severe plumbing problems in the future), total replacement of the line might be the best solution.