Table 2.5 Summary of Project Elements

Works Programme	Mid 2006 to Mid 2009
Major Elements in Pak Ngan Heung River and Ling Tsui Tau U-Channel
(a) Open Trapezoidal Channel	Length = 80m	Depth = 2.5m – 3.5m		Bed width = 8m
	Gabion walls with rip-rap bases and natural substrates.
(b) Rectangular Channel	Length = 100m	Depth = 3m – 3.5m
	Rip-rap bedding and concrete vertical walls of rip-rap bedding
(c) Diversion Box Culvert	Length = 180m	3 cells 3m(W) x 2m(H)
(d) U-Channel (Ling Tsui Tau)	Length = 200m	750mm U-channel
Major Elements in Luk Tei Tong By-pass Channel
(a) Rectangular Shape	Length = 350m	Depth = 0.8m	Bed width = 14m – 18m
	A minimum of 200mm high embankment will be constructed at most of the section of the channel to avoid surface runoff from existing marsh flowing to the proposed by-pass channel. In order to match with the downstream Luk Tei Tong river, the height of the embankment would be gradually increased to about 1500mm at only the non-sensitive areas.
(b) Reprovision of crossings	2 numbers (1 vehicular crossing and 1 pedestrian crossing)
Major Elements in Luk Tei Tong River
(a) Open Trapezoidal Channel	Length = 240m	Depth = 3m	Bed Width = 3m
	Gabion walls with rip-rap bases and natural substrates.
Major Elements in Tai Tei Tong
(a) River Widening	3 bottlenecks only
	Existing river bed will be untouched and the bank will be reinstated by gabion blocks.