20200405 Ver 1_PercussiveActivities_20200325

Pile driving will be required, a percussive activity, for both the northern and southern bridge
crossings of Long Creek. The pile driving is necessary to provide support for the bridge spans.
Pile driving techniques are the least invasive in wetlands and have the least amount of land
disturbance. The northern crossing with have four piles that need driving at one location for the
concrete structure to support the bridge span (Figure 3). The southern bridge crossing will need
eight piles driven, four at two different locations, each on either side of Long Creek (Figure 9).
Duration for each location (total of three locations with four pilings at each location), is
anticipated to be two days, limited to working daylight hours. This amounts to an estimated six
days, but may not be back to back days, depending on weather and construction schedule.