Green Spring is roughly circular, 93 ft (28.4 m) in diameter, and enclosed by concrete on the southwestern side. The spring pool depth averages 3.7 ft (1.1 m). Rosenau et al. (1977) reported the depth in a conical depression in the north-central part of the pool to be about 125 ft (38.1 m). Exposed limestone lines the pool edges and a set of stairs leads down to the spring on the southwest side. Land rises 5 ft (1.5 m) above the water surface to a grassy area with palms and oaks. The milky green water has poor visibility of less than 0.5 ft (0.1 m). The spring pool feeds several runs that branch and meander through the adjacent floodplain. Average width of the runs is 3 ft (0.9 m) and average depth is 0.3 ft (0.9 m). The spring flows 0.3 miles (0.5 km) northeast to Lake Monroe. The spring is being developed into a county park. The average discharge between 1932 and 2000 was 1.10 ft3/s (6).