98 REPORT OF INVESTIGATIONS NO. 50
Orlando Utilities Commission well field (two wells) at Primrose and Church and about the same distance east of the Commission's Highland well field. The observation well is 655 feet deep and cased to 383 feet, whereas the supply wells are about 1,200 to 1,500 feet deep and cased to about 1,000 feet. A comparison of pumping times in the well fields with minor fluctuations in the water levels in the observation well shows a direct and immediate correlation (See figure 42.). Each time a pump in either well field was turned on or off a sharp change occurred in the water level in the observation well. This indicates a good connection between the upper and lower zones.
The water level in the lower zone in the vicinity of Orlando was always somewhat below the level in the upper zone in 1963-64 because an average of about 25 million gpd (gallons per day) was withdrawn from the lower zone and was replaced by leakage through the overlying beds. Also, several hundred drainage wells discharged water directly into the upper part of the aquifer in
8125' 24' 23' 22' 21' 20, 81*19'
34' I w Highlond Observation w fel d 833-120-3' 33'.
5 Primrose
595 well field
3 2 . . . 
If
0 28*31 '0 1 2Mile
- U. A
60o
>Jq
Observation Well
833-120-3
GO t
tLA 0 60.5
I
~ 6-.0
c c o
La LL. .jZ
2 3 4 5 6 MARCH, 1964
Figure 42. Hydrograph of well 833-120-3 showing effects of pumpage in the Orlando well fields.