Site checklist before you dig

Ground

• Look up your parcel in the USDA soil survey for soil type, rock and shallow groundwater.
• Plan test pits or borings where the bunker will sit.
• Note where water runs and pools in spring. Keep the bunker out of drainage paths.
• Ask neighbors about wells, springs and wet basements.

Lines and law

• Request utility locates through 811 before digging. In Utah, state law requires a locate request through Blue Stakes; every state has its own 811 center.
• Find your septic tank, drain field, well and any buried propane or fuel lines. Private lines are often not marked by 811.
• Check setbacks from property lines, wells and septic with your county.
• Ask the county building department what permits a buried accessory structure needs.

Access

• A firm route from the road for a flatbed carrying a 10 ft wide load.
• A level, solid pad for the crane next to the excavation, clear of overhead power lines.
• Room for spoil piles at least 2 feet back from the edge, and somewhere to stockpile backfill.

Daily life

• How far the entry is from the house, and the route there in the dark and in snow.
• Where the air intake and exhaust will surface, away from vehicle exhaust and generator fumes.
• Where the emergency exit will come up.

Questions