East Kowloon line (1970 scheme)
East Kowloon line () was one of the original five MTR lines proposed in the late 1970s in Hong Kong, which would have connected Sheung Wan with East Kowloon. Hong Kong Mass Transportation Study (1967). In September 1967 the Freeman, Fox, Wilbur Smith & Associates of Britain published a proposal to construct a mass transit system in Hong Kong, in which East Kowloon line was called Sha Tin line, connecting Wo Liu Hang in Fo Tan and Tsim Sha Tsui. Hong Kong Mass Transit Further Studies (1970). Freeman, Fox, Wilbur Smith & Associates published a new report on  MTR construction in 1970, with the original Sha Tin line cut back from Sha Tin to Diamond Hill to become East Kowloon line, and extended across the harbour from Tsim Sha Tsui to Sheung Wan. Alignment and stations. The new report stated that the Sha Tin section need not be built immediately since an error was made in the 1966 census. However, the report pointed out that the cross-harbour traffic demand for the East Kowloon area would be heavy, necessitating an extension to Rumsey. Modified Initial System (1975). With the withdrawal of the Japanese consortium from the MTR construction  contract in 1975, the Government announced that the initial system would be reduced to 15.6 km to become the Modified Initial System. Construction arrangements would be made on the MIS to facilitate EKL construction at a later time, and the EKL would eventually be able to extend to Wo Liu Hang as originally planned. Although the 1970 proposal stated that Sha Tin District did not need a metro during the meantime, the 1975 proposal pointed out that the demand of the EKL would be too low to support construction of the line, if the Sha Tin section was not built  together. Architectural reservations. With the uncertainty on the Sha Tin extension, and with no available land to construct a depot along the remainder of the alignment, arrangements were made to let EKL use the Kowloon Bay depot of Kwun Tong line. Choi Hung station. In order to prevent EKL trains from interfering with Kwun Tong line operation when accessing the depot, a direct track was built for the required connection, which passes through Choi Hung station. Diamond Hill station. According to the MIS plan, Diamond Hill station would eventually have five tracks and eight platforms. During construction of the station , spaces were reserved for later construction, making the size of Diamond Hill greater than other stations. Comprehensive Transport Study (1976). In 1976 the Government invited a consultation company to carry out a study on transportation in Hong Kong. The resulting report proposed the Sha Tin Loop, East Kowloon line and the Tsim Sha Tsui extension, built in stages to replace the original EKL proposal. The Loop and the TST extension did not have much difference from the 1967 proposal, although the new arrangement was to let KCRC operate the two lines first, to be transferred to MTRC after completion of  the East Kowloon line. Sha Tin Loop. The Sha Tin Loop was to be constructed as a branch of the Kowloon–Canton Railway by KCRC, in the form of a rapid transit line, providing rail access from eastern Sha Tin to the urban areas. The route was to connect East Kowloon line after the latter's completion. Alignment. A new tunnel would be constructed to connect the Tsim Sha Tsui extension. 1980s. Eastern Harbour Tunnel. In 1984 the Government decided to construct Eastern Harbour Crossing, carrying both road and rail, to alleviate congestion at Cross-Harbour Tunnel. Kwun Tong line  was extended from Kwun Tong to Quarry Bay upon the tunnel's completion. The plan to construct East Kowloon line was stalled with the completion of the new cross-harbour connection. Sheung Wan station. During the construction of Sheung Wan station, platforms for East Kowloon line were built together to prevent interference that later construction of the EKL might arise. In May 1986, the station was opened with the reserved EKL platforms above Island line platforms. The ends of the platforms were shut off by brick walls, leaving only 60 metres for the platforms. Posters for the East Kowloon line  were spotted when the station first opened. Other reservations made. East Kowloon Corridor. During the construction of the East Kowloon Corridor in the 1970s, sheet pile walls were constructed along the alignment and stations on the proposed East Kowloon line, so that no structural damage would be done to the viaduct during the construction of the MTR line. Second Integrated Transport Study. In 1989 the Government issued the Airport Core Programme plan, and further postponed the construction of the East Kowloon line for the reason of "insufficient distribution of resources". The Central and Wan Chai Reclamation plan was rearranged to  facilitate construction of a fourth cross-harbour railway. KCRC started to propose the plan of extending the KCR network southwards by getting involved in the new railway plan. The cross-harbour section of the East Kowloon line was substituted by the construction of the third cross-harbour railway on Tung Chung line, part of the proposed Airport Railway. Third harbour rail crossing. In 1989, KCRC handed in a new proposal to the Government, in which today's East Rail line, then KCR British Section, would be extended southwards to Central via Victoria Park and Central and Wan Chai Reclamation. The  Government also mentioned the possibility of extending KCR southwards and Kwun Tong line to Fortress Hill on the Island line. Since the reclamation project involved was under discussion, the Government encouraged a new harbour rail crossing to the area of Tin Hau and Fortress Hill, with another new railway passing through the reclamation area. Consequently, the KCR proposal was ignored. With the immediate necessity of a third cross-harbour rail link, and also the question about the necessity of a cross-harbour rail link for the Airport Railway, the Government assigned the new harbour connection to the Airport Railway. The  new crossing itself did not solve Tsuen Wan line's fundamental problem - the line was used by both passengers from Kowloon and New Territories East. Fourth harbour rail crossing. With the assignment of the third harbour rail link to the Airport Railway, which alleviated the congestion on the Nathan Road section of Tsuen Wan line, the Kwun Tong line extension plan was held back for further planning and consideration. The reconsidered fourth harbour rail crossing started from Hung Hom to Central via the reclamation area, similar to the 1989 proposal by KCRC. Eastern Corridor. In the new railway development study  in 1993, East Kowloon line was modified to become a medium capacity system, and the alignment was cut back to Kowloon station on the Lantau Airport Railway, forming an Eastern Corridor together with Tsim Sha Tsui Extension and Ma On Shan Rail. A reserved space for the East Kowloon line remains under Kowloon station. In 1994 the Government published the Railway Development Strategy. The TST extension, Ma On Shan Rail and Tseung Kwan O line would be constructed first. Other sections, such as the Eastern Corridor and the fourth cross harbour rail link would be reconsidered. In 1998, the Government  published the third Integrated Transport Study and the second Railway Development Study, breaking the Eastern Corridor into sections and proposing numerous plans to link them up, forming today's West Rail line, Kowloon Southern Link, Tsim Sha Tsui Extension, Sha Tin to Central Link (including the fourth harbour rail crossing, East Kowloon line, and the railway from Tai Wai to Diamond Hill) and Ma On Shan line. In the same year, KCRC won the tender to construct and operate West Rail, TST Extension and Ma On Shan Rail. The East Kowloon line became the East Kowloon section of the Sha  Tin to Central Link. Railway Development Strategy 2014. The name "East Kowloon line" was resurrected in the Railway Development Strategy 2014, published on 17 September 2014, as the name of a new line which bears no relation to previous proposals of this name. It comprises a new line serving the mid-levels of Kwun Tong District, originating around Diamond Hill station and stretching to Po Lam station, with proposed intermediate stops at Choi Wan, Shun Tin, Sau Mau Ping, and Po Tat. Part of the rationale for this project comes from the large-scale development underway at the former Anderson  Road quarry. The new rail line is projected to cost around $27.5 billion.