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.
The Rio Grande Wild and Scenic River, or El Rio Bravo del Norte, provides for the preservation and protection of the pristine character of the Rio Grande from the Coahuila/Chihuahua, Mexico, state border upstream from Mariscal Canyon to the Terrell/Val Verde County line in Texas downstream.