The Rochor Canal continues upstream as far as the junction of Jalan Jurong Kechil and Upper Bukit Timah Road; the source of the Rochor River lies in Beauty World MRT station, which has a possible extension to Tengah as part of the Deep Tunnel Sewerage System, it also has a canal that leads to the Kranji Reservoir.
[1] The river has often been regulated in the past and expanded by channels to control the floods in Bukit Timah.
Because this did not help, the Bukit Timah Flood Alleviation Scheme (BTFAS) of the Singapore National Water Agency PUB (built in the 1960s) added two additional service channels: the Bukit Timah First Diversion Canal (1966–1972, 3.2 km after Pandan Reservoir) and the Bukit Timah Second Diversion Canal (1990s, 4.4 km long, to Kallang Basin).
The river (and canal) used to be an important waterway for the timber industry, with many sawmills and wood factories on its banks.
There should be an attractive stretch of the river with urban boulevard, promenades, pedestrian bridges, terraces, several gardens and a community space.