Farmer digging....finds a buried house? What is this mess?

What happens here

This project details the installation of a comprehensive farm water system, involving extensive trenching across 3200 feet of land, laying poly pipe, making secure connections with stainless steel fittings, and backfilling trenches. The system integrates with an off-grid solar well and gravity-fed water tanks, highlighting both the heavy machinery operation and the practical challenges encountered during the build, such as unexpected rocky terrain and buried debris from an old house foundation.