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Table 1

1 January 2000

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Table 1: Key parameters

Parameter	Units	Value
		Existing (2009 survey)	After raising
Catchment area	km2	2.57	No change
a) permanent impoundment	m3	106,000	No change
b) controlled flood storage	m3	Nil	233,000
c) Total	m3	106,000	339,000
Surface area at overflow level	m2	68,000	No change
Crest of non-overflow embankment	mOD	88.02	91.10
Maximum storage level	mOD	87.02	89.72
River Bed level	mOD	80.8	No change
Dam height above stream bed	m	7.4	10.5
Diameter of orifice to attenuate flood flows	m	N/A	0.35

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