In addition, rates will differ based on how often you want pros to clean. Generally, the more times a house cleaner comes in a month, the lower the price per visit, though this is often a matter of $5 or $10 per clean. Some cleaners offer a discount if homeowners are willing to pay for multiple visits upfront, or if they sign a long-term contract.
In 1903, the newly-independent Panama sold the rights to the canal to the U.S. for $10 million. The U.S. military had a strong presence in the Panama Canal Zone until 1999, when all U.S. military bases were closed. The canal is still used for the transportation of military water vessels.
an artificial waterway constructed for navigation or for the movement of water. The digging of canals for irrigation probably dates back to the beginnings of agriculture, and traces of canals have been found in the regions of ancient civilizations.avigation canals are also divided into open and lock canals. Open canals are built by joining waterways whose water levels are almost the same; canals with locks are used when there is a difference in levels or when the route of the canal crosses a high water divide.