Trenching Shallow well with 18" trench for electrical conduit dug by hand to minimize mess. (Wilmington,MA) Artesian well with 5-foot deep trench (dug by backhoe) to house for year-round use (Wayland,MA) 100' long 18" deep trench from well to pool area (Holliston,MA) 18" deep trench dug by hand (Braintree,MA) Measurement of trench depth to assure code compliance (Lynnfield,MA) 5' deep trench in sand going under walkway and front porch (Mendon,MA)