What We Check in the Ground Before Digging in Austin
Three questions about the ground come before any gate in Austin: is the lot in a floodplain, is a protected tree near the line, and has 811 been called. Callers from Avery Ranch, Northwest Hills and Balcones Woods get the same three checks, because each answer changes what we build.
Floodplain comes first, because the City of Austin requires a fence permit in a floodplain regardless of the fence height. That covers even a short run beside an Austin driveway, so we ask for your lot's floodplain status at the first visit. For any lot outside a floodplain, such as one in Northwest Hills or Balcones Woods, check with the city.
Trees come second. Trees decide where a post can go, and the city arborist defines a heritage tree as 24 in or more across at 4.5 ft, in a listed species that includes all oaks, pecan and bald cypress, and removal is prohibited except under the city's code section 25-8-641. Pruning more than 25% of the canopy needs a permit for regulated trees, which start at 19 in, so at Avery Ranch we mounted the panel on the pier and left the limbs alone. A trench that cuts the roots of such a tree is a bad bet, so we shift the line or skip the trench, as we did for Thea in Avery Ranch.
Utilities come third. Texas law, which applies in Austin as everywhere in the state, has the excavator notify the state notification center no earlier than the 14th day and no later than the 48th hour before digging, and Saturdays, Sundays and legal holidays do not count toward that window. We time the call to the install date for Austin, Lakeway and Round Rock jobs alike, so the marks are down when the auger arrives.