A 9.7km stormwater tunnel.
	A 3km motorway tunnel (within the stormwater tunnel).
	Ingress and Egress connections to the motorway tunnel linking KL-Seremban Highway.
	Ingress and Egress connections linking the motorway tunnel to Jalan Sultan Ismail and Jalan Tun Razak.
	A holding basin at Kampung Berembang (off Jalan Ampang).
	A storage reservoir at Taman Desa (ex mining pond).
	A twin-box culvert to release flood discharge from storage reservoir to Sungai Kerayong.
	An operation control centre complete with administration, supervision, river management and traffic management facilities for management, operation and maintenance of the SMART system.

Stormwater Tunnel

Length: 9.7km   Diameter: 11.7m   Storage Capacity: 1,000,000 cubic meter   Tunneling Method: Tunnel Boring Machine (TBM)   Origin of Tunneling Technology: Germany   TBM Type: Slurry Shield Largest in South East Asia & 2nd Largest in Asia

Motorway Tunnel Length: 3 km   Structure type: Double Decker   Ingress and Egress Connections' Length : 1.5km at Jalan Sultan Ismail. 1.4km at Jalan Tun Razak. 1.6km at KL-Seremban Highway.   Links: Connects city centre near Kampung Pandan roundabout to KL-Seremban Highway near Sungai Besi.

Storage Resevoir

Location: Ex-mining pond in Taman Desa   Surface Area: 22 ha ( 216 594 sq m)   Storage Capacity: 1,400,000 cubic metres

Holding Basin

Location: Kampung Berembang (behind Gleneagles Hospital in Jalan Ampang)   Surface Area: 10 ha (104 008sq m)   Storage Capacity: 600,000 cubic metres