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 CITY, TEXAS. Rio Grande City, the county seat of Starr County and one of the oldest settlements in South Texas, is on the Rio Grande 100 miles from both Brownsville and Laredo in the extreme south central part of the county.