(However, if the geological conditions are especially difficult or access is extremely limited, drilling can cost $30-$50 a foot or more.) For example, the sustainable Arizona homesteaders at ByExample.com report paying $6,750 to have well drilled 280' deep, or about $24/foot.
A second lieutenant (grade O-1) is usually promoted to first lieutenant (grade O-2) after 18 months in the Army or 24 months in the Air Force and Marine Corps.The difference between the two ranks is slight, primarily being experience and higher pay. second lieutenant (grade O-1) is usually promoted to first lieutenant (grade O-2) after 18 months in the Army or 24 months in the Air Force and Marine Corps.
Before 1871, when the whole British Army switched to using the current rank of Lieutenant, the Royal Artillery, Royal Engineers and Fusilier regiments used First Lieutenant and Second Lieutenant. The First Lieutenant (1st Lt) in a Royal Navy ship is a post or appointment, rather than a rank. Historically the lieutenants in a ship were ranked in accordance with seniority, with the most senior being termed the First Lieutenant and acting as the second-in-command, unless the ship was complemented with a Commander.