[9] The new station was expected to boost retail and residential developments in the Telok Blangah area, which was known for the Keppel Harbour and associated industries.

[10] To minimise impact on businesses in the area, the contractor used silent pilers when driving steel piles into the ground.

The contractor initially considered rerouting the drainage system that channelled water to the sea but that was financially unfeasible.

[11] Due to the limited space, two of the World Trade Centre's exhibition halls were demolished to facilitate construction works.

The rail project team had constructed 10 viaduct foundations for the road section that crosses the station site.

At the same time, the contractor had to maintain the traffic flow in the area – not just for visitors to the World Trade Centre, but to prevent delays and disruptions to port operations nearby.

[12] The contractors (Shimizu Corporation, Koh Brothers and Dillingham Construction International) for the 2.16 km (1.34 mi) of tunnelling works between this station and the adjacent Outram Park station had to monitor for any ground movement for the shophouses and ensure operations for the Malaysian rail service was not affected.

[16] As part of a joint emergency preparedness exercise by the LTA and train operators SBS Transit and SMRT, security screenings were held at the station on 2 August 2019.

[18] In 2001, Yeo Cheow Tong, the communications minister, announced that the Circle line (CCL) will serve the HarbourFront area.

[26] As announced by transport minister Lui Tuck Yew during his visit to the CCL4 and 5 stations on 1 August 2011,[27][28] the CCL platforms began revenue service on 8 October that year.

Equipment essential for the operations in the CD shelter is mounted on shock absorbers to prevent damage during a bombing.

[48] Enigmatic Appearances by Ian Woo is a series of line-drawings depicting various sea creatures, ships and clouds in minimalist style.

Painted on 60 blue vitreous enamel wall panels, the work was intended to reflect the station's maritime theme and its location near the port.

Although Woo was used to working independently, he learnt to articulate his thoughts and intentions with the architectural team, with the help of NEL art coordinator Constance Sheares.

[52] After the architects and the Art Review Panel approved his line drawings, the figures were painted and enlarged.

This process took place across two weeks, with some revisions made due to the artist's dissatisfaction with some of the enlarged figures.

[50] Displayed on the wall of the CCL platforms near the escalators, Commuting Waves by Jason Ong is a pair of sculptures depicting 3D waveforms.

[53][54] The waveforms were derived from commuter traffic at the station, with the positions of the glass 'fins' representing the passenger volume and train frequencies.

Two assistants recorded the train frequency and passenger traffic on a randomly selected weekday and weekend.

Using phase shift, a concept by minimalist composer Steve Reich, the data lines were spaced out from the original graphs.

[58][59] This work by Lui Honfay and Yasmine Chan, along with Rain, was selected through the International Art Seats Design Competition in 2006.

[58] Matrix consists of a series of benches engraved with the station name in a dot-matrix style on the seat surface.