A slip (also sometimes called a scoop, scraper, or road scraper) was the common implement for moving dirt when doing such things as digging ponds or making fills where large volumes of dirt were needed.
RIO GRANDE. The Rio Grande rises in Rio Grande National Forest, San Juan County, Colorado (at 37Â°47' N, 107Â°32' W), as a clear, spring and snow-fed mountain stream 12,000 feet above sea level. Its origin is at the Continental Divide in the San Juan Mountains.
Shortly before entering the Gulf Coastal Plain, the Rio Grande cuts three canyons between 1,500 and 1,700 feet (460 and 520 metres) in depth across the faulted area occupied by the âbig bend,â where the Texas side of the river comprises the Big Bend National Park.