It looked very like the opening excavation of a mine.

Its natural habitats are swamps, freshwater marshes, and open excavations.

"They began with an open excavation onshore by digging a portal.

"Yet there was no open excavation.

Open excavations were refilled with earth, and Capitol Square became open pasture for livestock.

Its natural habitats are subtropical or tropical moist lowland forests, intermittent freshwater marshes, arable land, plantations, open excavations, and canals and ditches.

Its natural habitats are temperate forests, temperate shrubland, Mediterranean-type shrubby vegetation, intermittent freshwater marshes, rocky areas, arable land, pastureland and open excavations.

Its natural habitats are subtropical or tropical seasonally wet or flooded lowland grassland, rivers, pastureland, heavily degraded former forest, open excavations, and seasonally flooded agricultural land.

Its natural habitats are temperate forests, temperate grassland, shrub-dominated wetlands, swamps, freshwater marshes, intermittent freshwater marshes, ponds, open excavations, seasonally flooded agricultural land, and canals and ditches.

Its natural habitats are subtropical or tropical dry shrubland, rivers, intermittent rivers, freshwater marshes, intermittent freshwater marshes, water storage areas, ponds, aquaculture ponds, open excavations, and irrigated land.

The forum, Urban Application of Trenchless Technology, whose co-sponsors are New York University and Polytechnic University, will explore the indirect and social costs of open excavations and how trenchless technology might reduce them.

Its natural habitats are temperate forests, rivers, intermittent rivers, shrub-dominated wetlands, swamps, freshwater lakes, freshwater marshes, arable land, pastureland, plantations, rural gardens, water storage areas, ponds, open excavations, wastewater treatment areas, and introduced vegetation.

Most were built by open excavation - the so-called open-cut or cut and cover method - in which deep trenches were dug from street level, tracks were laid, and supporting walls were built up, roofed over and covered with dirt and fill.

This can range from things from injuries caused by "liable for injuries caused by a variety of hazardous conditions, including open excavations, uneven pavement, standing water, crumbling curbs, wet floors, uncleared snow, icy walks, falling objects, inadequate security, insufficient lighting, concealed holes, improperly secured mats, or defects in chairs or benches".