Why ‘Love MacRitchie’

Pause, and view our infographics to find out more about Love MacRitchie, and why you should support this movement. (For viewers on mobile, click here for a smoother experience)

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Read on to find out more about the Cross Island Line

& 5 reasons to support ‘Love MacRitchie’,

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The Cross Island Line (CRL), which will connect Changi and Jurong by 2030, is depicted to pass beneath a 1.8 km stretch of forest near MacRitchie Reservoir. This passage through the Central Catchment Nature Reserve (CCNR) begins at the Singapore Island Country Club (Bukit Location) in the west to near Venus Drive in the east. It passes through some of the most pristine ecosystems in Singapore, including old regrowth forest and one primary forest patch.

The Cross Island Line_new

This does not have to be. An alternative is available, as recommended by the Nature Society of Singapore (NSS) in its Discussion and Position Paper. It is possible for the CRL to be aligned such that it passes around the Nature Reserve instead.

5 reasons to support ‘Love MacRitchie’

1. Irreplaceable habitats and biodiversity



The area in concern is a legacy left behind by the declaration of a Municipal Catchment for MacRitchie Reservoir in 18671. This mature regrowth forest is almost 150 years old now, forming an important seed bank for the regeneration of surrounding forests.

Situated in the core area of the Central Catchment Nature Reserve (CCNR), it also sports patches that make up a significant proportion of Singapore’s remaining primary lowland dipterocarp forest. Only 0.49% (2 km2) of this vegetation type is left in Singapore1. What is remaining cannot afford anymore impact.

The proposed Cross Island Line (CRL) also passes near natural stream systems. These streams have vastly different biophysical characteristics such as lower temperature, pH and velocity, as compared to the concretized waterways we are more acquainted with. Many native freshwater organisms can only thrive in these natural streams, beyond which hardier alien species that have been introduced by Man have largely taken over.



Throughout Singapore’s history of development, especially since the 19th century, we have lost about a third of our native forest fauna along with extensive deforestation2. Primary and mature regrowth forests in CCNR today still house more than half of the country’s residual native biodiversity2, representing their last population strongholds. Further extinction would mean loss of seed dispersal agents, stunted forest regeneration, ecosystem degradation, etc.

Learn more about MacRitchie’s threatened fauna and flora.



Works associated with the construction of CRL threaten to damage the irreplaceable habitats and biodiversity of MacRitchie Forest. Tunneling, although seemingly of little impact to surface ecosystems, can in fact cause problems related to alteration of underground hydrology, disturbance to fauna by ground-borne noise, and loss of pressure to surface, requiring extensive works above the affected site.

Site investigation. Of greatest and most immediate concern are site investigation works to determine if the substrate is suitable for tunneling. The operation of boring machines and the geophysical surveys can potentially be damaging. Noise, soil compaction, alteration of forest microclimate, loss of topsoil to erosion, siltation and toxic contamination of stream systems are all possible consequences should site investigation works proceed. Read the Environmental Impact Assessment (EIA) report for more details.

2. Forest fragmentation

Our Nature Reserves are not contiguous from the perspective of their inhabitants.
Reservoirs, pipelines, roads, military facilities and security fences form barriers to wildlife movement, effectively reducing their habitat range and population size. Fragmentation also prevents individuals from mating across isolated patches, resulting in degrading gene pools. Surface engineering activities will contribute to further fragmentation, painting a grim picture for the future of CCNR’s flora and fauna.Fragmentation_Final

Image: Tony O’Dempsey

3. Convention on Biological Diversity

Recognizing the value of biodiversity on quality of life, Singapore became a signatory to the Convention on Biological Diversity (CBD) since its inception at the 1992 Rio Earth Summit. This international commitment makes it an obligation for the State to undertake measures with reference to Protected Areas to3:

  1. Establish a system of protected areas or areas where special measures need to be taken to conserve biological diversity;
  2. Develop, where necessary, guidelines for the selection, establishment and management of protected areas or areas where special measures need to be taken to conserve biological diversity;
  3. Regulate or manage biological resources important for the conservation of biological diversity whether within or outside protected areas, with a view to ensuring their conservation and sustainable use;
  4. Promote environmentally sound and sustainable development in areas adjacent to protected areas with a view to furthering protection of these areas.

Breaching the boundaries of the Central Catchment Nature Reserve would be to contradict the Government’s efforts to promote biodiversity conservation and its commitment to CBD.

4. A Nature Reserve is a Nature Reserve

Nature Reserves are areas that have been set aside for the long-term conservation of natural habitats and biodiversity. They are afforded the strictest of legal protection among all types of green areas in Singapore, and their status should not be taken lightly. Aside from being home to our surviving forest wildlife, CCNR is probably the most significant green lung in our cityscape, ensuring that the forest can continue to provide valuable ecosystem services in future. These services include water catchment, flood control, urban heat island mitigation, recreation, education and research. Nature Reserves should essentially remain off limits to development, and be kept intact as sacred places with less tangible long-term benefits.

5. An alternative is available

As Singapore seeks to up the efficiency of our public transport system, minimizing transit time has become the priority for recent MRT developments. However, a quicker train ride should not diminish the value of MacRitchie Forest and the ecosystem services it provides. Considering the likely cost of forest degradation, it is justifiable to go that extra mile by tunneling around the Reserve instead.

We urge LTA to give serious consideration to the alternative route that skirts around the southern part of CCNR.

1 Nature Society (Singapore), 2013. Cross Island Line Discussion and Position Paper. Retrieved from http://www.nss.org.sg/documents/(NSS)%20Cross-Island%20Line%20Position%20Paper.pdf. 2 Brook, B. W., Sodhi, N. S., & Ng, P. K. L., 2003. Catastrophic extinctions follow deforestation in Singapore. Nature, 424(6947): 420–426. 3 CBD Secretariat. Protected areas and the CBD. Retrieved from https://www.cbd.int/protected/pacbd/.