We see this quite often....House is at a lower elevation, UG service runs down hill, & when it rains it pours.
The cause is conduit laid in an uneven ditch. After backfilling, the conduit is stretched to conform to the uneven bottom, & seperates, allowing ground water to enter the conduit & into the materbase.
Although I don't agree with the method, some Home Owners have had the POCO kill the service, & they have drilled a series of small weep holes, in the Conduit, just below the Meterbase to allow the water to "sprinkle" out before flooding the Base.
