Table 7. Maintenance water capacity and remaining volume in the waterhead (Waterproof, unit: tons)

Storage	Class	Mean	Apr.	May	Jun.	Jul.	Aug.	Sept.	Oct.
2,012 ton (0.5m)	(B) Leakage	0.052	0.052
	(C) Maintenance	1,007.0	982.0	1,090.3	1,082.9	1,015.6	1,059.5	947.5	871.2
	Residual depth (Volume)	0.25m (1,005.0 / 49.9%)	0.26m (1,030.0)	0.23m (921.7)	0.23m (929.1)	0.25m (996.4)	0.24m (1,064.5)	0.28m (1,140.8)
4,024 ton (1.0m)	(B) Leakage	0.102	0.104						0.092
	(C) Maintenance	1,007.1	982.0	1,090.4	1,083.0	1,015.7	1,059.6	947.6	871.3
	Residual depth (Volume)	0.73m (2,949.6 / 73.3%)	0.76m (3,042.0)	0.73m (2,933.6)	0.73m (2,941.0)	0.75m (3,008.3)	0.74m (2,964.4)	0.76m (3,076.4)	0.67m (2,681.2)
6,036 ton (1.5m)	(B) Leakage	0.144	0.133	0.156					0.092
	(C) Maintenance	1,007.1	982.1	1,090.4	1,083.0	1,015.7	1,059.6	947.6	871.3
	Residual depth (Volume)	1.13m (4,545.1 / 75.2%)	1.03m (4,150.8)	1.23m (4,945.6)	1.23m (4,953.0)	1.25m (5,020.3)	1.24m (4,976.4)	1.26m (5,088.4)	0.67m (2,681.2)