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 River forms part of the natural border between the United States and Mexico. This river forms the border between the United States and Mexico, but only on the border with Texas. The rest of the United States-Mexican border is a land border stretching from New Mexico to California. There was a dispute over which river originally formed the border between the United States and Mexico in Texas. The Mexicans said it was Nueces River, which would have made Texas smaller than it currently is.