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.
Rio Grande (Texas). This 191-mile stretch of the United States side of the Rio Grande along the Mexican border begins in Big Bend National Park. The river cuts through isolated, rugged canyons and the Chihuahuan Desert as it flows through some of the most critical wildlife habitat in the country.