811 Guides by Project Type
Every digging project has unique 811 considerations — depths, risks, and private line concerns that vary by what you're building. Find your project below.
Fence Post Installation
Power augers and post-hole diggers are among the most common causes of utility strikes. What to do before any fence project.
Tree Removal & Stump Grinding
Stump grinders reach 12–18 inches deep. Root excavation goes deeper. 811 required before any tree work involving ground disturbance.
Deck Footings & Concrete Piers
Deck footings often go below frost line — 36 to 60 inches in cold climates. The deepest common residential excavation.
Irrigation System Installation
Trenching for irrigation crosses every utility corridor. 811 is step one; private line awareness is step two.
Swimming Pool Excavation
Pool digs are 5–8 feet deep over a large footprint — the most critical 811 call for residential work.
Shed Foundation & Anchoring
Ground anchors, helical piers, and concrete pads for outbuildings all require a valid ticket.
Driveway Replacement
Removing old concrete or asphalt often involves sub-base grading and excavation that can reach utility depths.
Mailbox Post Replacement
Even a mailbox post hole can hit a shallow telecom or electric line near the curb. A quick call prevents an expensive repair.
Running Power to an Outbuilding
Trenching conduit from your home panel to a garage or workshop crosses multiple potential utility paths.