The other facilities at Chek Jawa will remain open during the period. That is, the Visitor Centre (House No. 1), Viewing Jetty (at House No. 1) and Mangrove boardwalk.
The Mangrove boardwalk and northern part of the Coastal boardwalk was closed earlier this year.
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More about Chek Jawa on the NParks website and wildsingapore.