Seohae Line

{{Short description|Railway line in Gyeonggi-do and Seoul, South Korea}}

{{Infobox rail line

| box_width = 22em

| color = {{rcr|Seoul Metropolitan Subway|Seohae}}

| name = Seohae Line

| native_name = {{Lang|ko|서해선}}
Seohaeseon

| logo = x40px x40px

| logo_alt =

| image = Seoul Metro Seohae Line train.jpg

| image_width =

| image_alt =

| caption = Korail Class 391000 EMU.

| type =

| system =

| status = Operational

| locale =

| start = Ilsan

| end = Wonsi

| stations = 21

| routes =

| daily_ridership =

| open = 16 June 2018

| close =

| owner = Korea Rail Network Authority

| operator = Korail, SEO HAE RAIL CO.,LTD., ERAIL Co., Ltd.

| character =

| depot =

| stock = Korail Class 391000
ITX-Maum

| linelength_km =

| linelength = {{convert|47|km|abbr=on}} (131 km, future)

| tracklength_km =

| tracklength =

| tracks = 2

| gauge = 1,435 mm (4 ft 8 1⁄2 in)

| load_gauge =

| minradius =

| routenumber =

| linenumber =

| electrification = 25 kV 60 Hz AC

| speed_km/h =

| speed =

| elevation_m =

| elevation =

| website =

| map =

| map_state = collapsed

}}

{{Infobox Korean name

|hangul=서해선

|hanja=西海線

|rr=Seohaeseon

|mr=Sŏhaesŏn

}}

The Seohae Line ({{Korean|hangul=서해선|lit=West Sea Line}}) is a dual-track, electrified rail line in western Gyeonggi-do and Seoul, South Korea. The Seohae Line is being built in four sections simultaneously. The line runs {{convert|47|km|mi|abbr=on}} south from Ilsan in Goyang City, crosses the Han River, passes Gimpo Airport, Sosa, Siheung, and ends in Wonsi in Ansan. There is a transfer to different lines at Daegok, Neunggok, Gimpo Int'l Airport, Bucheon Stadium, Sosa and Choji. There are currently 21 stations (Ilsan-Wonsi). The line is operated by Korail, but the stations between Sosa and Wonsi are managed by SEO HAE RAIL CO., LTD., a subsidiary of Seoul Metro.{{Cite web|url=https://www.sosawonsi.co.kr/jsp/front/m5/m5_s01_t04.jsp|title=소사원시운영(주)|access-date=13 May 2019|archive-date=7 August 2020|archive-url=https://web.archive.org/web/20200807034925/https://www.sosawonsi.co.kr/jsp/front/m5/m5_s01_t04.jsp|url-status=dead}} Since the infrastructure is also owned by Korail, the line runs on the left like the rest of the South Korean mainline railway network.

History

After the completion of planning, the project was written out as a build–lease–transfer (BLT) project, and Daewoo was selected{{cite web|url=http://www.dwconstir.com/common/download.asp?fileName=090714_Annual%20Report_Final.pdf|title=Daewoo E&C Financial Statements 2008}}{{dead link|date=May 2018 |bot=InternetArchiveBot |fix-attempted=yes }} as preferred bidder in September 2008. Construction was scheduled to last from October 2009 to March 2013.Daewoo E&C [http://www.dwconstir.com/common/download.asp?fileName=2008%20Auditors%27%20report.pdf Non-Consolidated Financial Statements]{{dead link|date=May 2018 |bot=InternetArchiveBot |fix-attempted=yes }} 31 December 2008 and 2007 Due to the 2008 financial crisis, it was difficult to gather investors to finance the project, and negotiations stalled. An agreement was finally signed on 21 December 2010, with construction set to start in the first half of 2011.{{cite web |url=http://biz.chosun.com/site/data/html_dir/2010/12/21/2010122101167.html |script-title=ko:소사~원시 복선전철 내년 상반기 착공예정 |language=ko |date=21 December 2010 |publisher=The Chosun Ilbo |access-date=30 December 2010}} Project costs are ₩1.5248 trillion; the contractor has altogether seven years for design and construction, and will manage and maintain the line for the first 20 years of operation.

The first section began construction in 2011 and opened on 16 June 2018.{{cite web|url=http://www.asiae.co.kr/news/view.htm?idxno=2016122113205777944|title=서울 접근성 높인 소사원시선 역세권 아파트 'e편한세상 시흥' |date=21 December 2016|publisher=Asiae|access-date=13 January 2017|language=ko}} The second section runs north from Sosa to Daegok on the Gyeongui-Jungang Line and Seoul Subway Line 3, with transfers to several other lines. It was expected to open on 29 June 2021,{{cite web |last=Jang |first=Byeong-guk |date=20 July 2021 |title=[Pick] 대곡소사선, 원종까지 부분개통 확정 "내년 2월 목표" |trans-title=[Pick] Daegok Sosa Line, Partial Opening to Wonjong Confirmed "Targeting February Next Year" |url=https://www.redaily.co.kr/news/articleView.html?idxno=2031 |access-date=18 April 2025 |website=철도경제신문 |language=ko}} but did not open until 1 July 2023.{{cite web |last=Tebay |first=Andy |date=3 July 2023 |title=Seohae Line commuter rail extension opens in Seoul |url=https://www.railjournal.com/passenger/commuter-rail/seohae-line-commuter-rail-extension-opens-in-seoul/ |access-date=18 April 2025 |website=International Railway Journal}}{{cite web |last=Jeong |first=Jaehoon |date=30 June 2023 |title=고양-부천 20분 연결…서해선 대곡~소사 구간 내달 1일 개통 |trans-title=Goyang-Bucheon 20-minute connection… Seohae Line Daegok-Sosa section opens on the 1st of next month |url=https://n.news.naver.com/mnews/article/018/0005520552?sid=100 |access-date=18 April 2025 |website=네이버 뉴스 |language=ko}} Another extension (Daegok-Ilsan) was opened at the end of August 2023.{{cite web |last=Lee |first=Byeong-woo |date=25 August 2023 |title=서해선 ‘일산역∼대곡역’ 26일 개통…기쁨보다 실망 |trans-title=Seohae Line 'Ilsan Station - Daegok Station' Opens on the 26th... Disappointment Rather Than Joy |url=https://www.mygoyang.com/news/articleView.html?idxno=74883 |access-date=18 April 2025 |website=고양신문 |language=ko}}{{cite web |last=Hong |first=Ki-woong |date=26 August 2023 |title=서해선 일산 연장 오늘부터 운행 [포토뉴스] |trans-title=Seohae Line Ilsan Extension to Start Operation Today (Photo News) |url=https://www.kyeonggi.com/article/20230826580005 |access-date=18 April 2025 |website=경기일보 |language=ko}} {{As of|October 2024}}, about ₩4.12 trillion (US$2.98 billion) has been spent on the Seohae Line.{{cite web | last=Tebay | first=Andy | title=Korean regional line extensions open | website=International Railway Journal | date=November 6, 2024 | url=https://www.railjournal.com/infrastructure/korean-regional-line-extensions-open/ | access-date=April 18, 2025}}

=Future=

Another extension (Ilsan-Unjeong) was approved in January 2024.{{cite web | url=http://www.vision21.kr/news/article.html?no=324175 | title=[비전21뉴스] 파주시, 서해선(대곡-소사) 파주 연장 확정! }} There is currently no opening date noted.

On 1 September 2010, the South Korean government announced a strategic plan to reduce travel times from Seoul to 95% of the country to under 2 hours by 2020. As part of the plan, the first section is to be further upgraded for {{convert|230|km/h||abbr=on}} the Wonsi–Hwayang extension is to be projected for {{convert|250|km/h||abbr=on}}, and the line may see KTX service.{{cite web |url=http://joongangdaily.joins.com/article/view.asp?aid=2925474 |title=Bullet trains coming to a town near you by 2020 |date=2 September 2010 |publisher=JoongAng Daily |access-date=27 October 2010}}

Tentative plans foresee the upgrade and incorporation of the Gyooe Line, a single-track non-electrified line without passenger service that connects Neunggok station (with a junction just before Daegok station) and Uijeongbu station in Uijeongbu. The Uijeongbu–Daegok–Sosa–Wonsi Line would then provide orbital metro service as a northern semicircle around Seoul, complementing the southern semicircle formed by the Suin–Bundang Line.

Another part of the tentative 2010 plans was a southern extension from Wonsi, connecting up with the Janghang Line before Hongseong station.{{cite web |url=http://www.railwaygazette.com/news/single-view/view/10/south-koreas-growing-network.html |title=South Korea's growing network |date=8 September 2008 |publisher=Railway Gazette International |access-date=29 August 2010}} As of April 2023, the construction of this section was 92% completed and was expected to be opened in the second half of October 2024.{{cite web |url=https://www.redaily.co.kr/news/articleView.html?idxno=5663 |script-title=ko:철도공단 충청권 사업단, 8개 철도사업에 올해 7082억 투입 |language=ko |date=27 April 2023 |publisher=Rail Economy News |access-date=29 September 2023}} However, by late 2024, the opening date of the Wonsi–Seohwaseong extension had been delayed to the first half of 2026.{{cite web | last=Choi | first=Seok-young |trans-title=Seohae Line Unconnected Section 'Seohwaseong-Wonsi'...Priority Opening Promotion | title=서해선 미연결구간 '서화성-원시'...우선개통 추진 | website=철도경제신문 | date=November 19, 2024 | url=https://www.redaily.co.kr/news/articleView.html?idxno=10677 | language=ko | access-date=April 18, 2025}}{{cite web |last=Seo |first=Min-gyu |trans-title=Shin Ansan Line 'Seohwaseong-Wonsi', priority opening in March 2026| title=신안산선 ‘사화성~원시’, 2026년 3월 우선 개통-화성신문 | website=화성신문 | date=March 28, 2025 | url=https://www.ihsnews.com/54466 | language=ko | access-date=April 18, 2025}}

Rolling stock

Map of the Seohae Line and other surrounding lines

{{Rapid transit OSM map|system_qid=Q16950|single_line=y|stations=y|stations_qid=Q626243|zoom=11|frame-lat=37.468222

|frame-long=126.797389|frame-width=500|frame-height=630}}

Stations

=Urban section=

The section from Sosa to Wonsi opened on 16 June 2018. The first phase (Sosa to Daegok) of the Sosa to Ilsan extension opened on 1 July 2023. The second phase (Daegok to Ilsan) of the Sosa to Ilsan extension opened on 26 August 2023. The line currently utilizes seven four-car Class 391000 trains manufactured by Hyundai Rotem and ten four-car Class 391000 trains manufactured by Dawonsys.

class="wikitable"

style="text-align:center;"

| Station
number

| width = "250pt" | Station name
English

| width = "150pt" | Station name
Hangul

| width = "150pt" | Station name
Hanja

| width = "150pt" | Transfer

| Distance
in km

| Total
distance

| colspan="2" | Location

style = "background:#{{rcr|Seoul Metropolitan Subway|Seohae}}; height: 2pt"

| colspan = "10" |

S07

|Ilsan

|{{lang|ko|일산}}

|{{linktext|一|山}}

|rowspan=4|{{rint|seoul|gye}} (Shared)

|style="text-align:center;"| ---

|style="text-align:center;"| 0.0

|width="75" rowspan=6 style="text-align:center;"| Gyeonggi-do

|width="75" rowspan=6 style="text-align:center;"| Goyang-si

S08

|Pungsan

|{{lang|ko|풍산}}

|{{linktext|楓|山}}

|style="text-align:center;"| 1.9

S09

|Baengma

|{{lang|ko|백마}}

|{{linktext|白|馬}}

|style="text-align:center;"| 1.7

|style="text-align:center;"| 3.6

S10

|Goksan

|{{lang|ko|곡산}}

|{{linktext|谷|山}}

|style="text-align:center;"| 1.6

|style="text-align:center;"| 5.2

S11

|Daegok

|{{lang|ko|대곡}}

|{{linktext|大|谷}}

|{{rint|seoul|3}} {{rint|seoul|gye}}

|style="text-align:center;"| 1.7

|style="text-align:center;"| 6.9

S12

|Neunggok

|{{lang|ko|능곡}}

|{{linktext|陵|谷}}

|{{rint|seoul|gye}}

|style="text-align:center;"| 1.8

|style="text-align:center;"| 8.5

S13

|Gimpo Int'l Airport

|{{lang|ko|김포공항}}

|{{linktext|金|浦|空|港}}

|{{rint|seoul|5}} {{rint|seoul|9}} {{rint|seoul|arx}} {{rint|seoul|gimpo}}

|style="text-align:center;"| 7.4

|style="text-align:center;"| 15.9

|style="text-align:center;" | Seoul

|style="text-align:center;" | Gangseo-gu

S14

|Wonjong

|{{lang|ko|원종}}

|{{linktext|遠|宗}}

|style="text-align:center;"| 4.3

|style="text-align:center;"| 20.2

| rowspan="16" style="text-align:center;" | Gyeonggi-do

| rowspan=4 style="text-align:center;" | Bucheon-si

S15

|Bucheon Stadium

|{{lang|ko|부천종합운동장}}

|{{linktext|富|川|綜|合|運|動|場}}

|{{rint|seoul|7}}

|style="text-align:center;"| 2.1

|style="text-align:center;"| 22.3

S16

|Sosa
(Seoul Theological Univ.)

|{{lang|ko|소사
(서울신대)}}

|{{linktext|素|砂}}

|{{rint|seoul|1}}

|style="text-align:center;"| 2.7

|style="text-align:center;"| 25.0

S17

|Sosaeul
(Bucheon Univ. Sosa Campus)

|{{lang|ko|소새울
(부천대 소사캠퍼스)}}

| ---

|style="text-align:center;"| 1.7

|style="text-align:center;"| 26.7

S18

|Siheung Daeya

|{{lang|ko|시흥대야}}

|{{linktext|始|興|大|也}}

|style="text-align:center;"| 2.1

|style="text-align:center;"| 28.8

| width="80" rowspan="5" style="text-align:center;"| Siheung-si

S19

|Sincheon

|{{lang|ko|신천}}

|{{linktext|新|川}}

|style="text-align:center;"| 1.4

|style="text-align:center;"| 30.2

S20

|Sinhyeon

|{{lang|ko|신현}}

|{{linktext|新|峴}}

|style="text-align:center;"| 3.3

|style="text-align:center;"| 33.5

S22

|Siheung City Hall

|{{lang|ko|시흥시청}}

|{{linktext|始|興|市|廳}}

|style="text-align:center;"| 3.6

|style="text-align:center;"| 37.1

S23

|Siheung Neunggok

|{{lang|ko|시흥능곡}}

|{{linktext|始|興|陵|谷}}

|style="text-align:center;"| 1.3

|style="text-align:center;"| 38.4

S24

|Dalmi

|{{lang|ko|달미}}

|{{linktext|達|味}}

|style="text-align:center;"| 2.4

|style="text-align:center;"| 40.8

| width="80" rowspan="5" style="text-align:center;"| Ansan-si

S25

|Seonbu
(Hando Hospital)

|{{lang|ko|선부
(한도병원)}}

|{{linktext|仙|府}}

|style="text-align:center;"| 1.6

|style="text-align:center;"| 42.4

S26

|Choji

|{{lang|ko|초지}}

|{{linktext|草|芝}}

|{{rint|seoul|4}} {{rint|seoul|suin-bundang}}

|style="text-align:center;"| 1.7

|style="text-align:center;"| 44.1

S27

|Siu

|{{lang|ko|시우}}

|{{linktext|時|雨}}

|style="text-align:center;"| 1.4

|style="text-align:center;"| 45.5

S28

|Wonsi

|{{lang|ko|원시}}

|{{linktext|元|時}}

|style="text-align:center;"| 1.5

|style="text-align:center;"| 47.0

style="background-color:lightgrey;"

|style="background-color:lightgrey;"| S29

|style="background-color:lightgrey;"| Int'l Theme Park (April 2027)

|style="background-color:lightgrey;"| 국제테마파크

|style="background-color:lightgrey;"| 國際−

|style="background-color:lightgrey;"|

|width="75" rowspan=2 style="text-align:center;"| Hwaseong-si

style="background-color:lightgrey;"| S30

|style="background-color:lightgrey;"| Seohwaseong (March 2026)

|style="background-color:lightgrey;"| 서화성

|style="background-color:lightgrey;"| 西華城

|style="background-color:lightgrey;"|

style = "background:#{{rcr|Seoul Metropolitan Subway|Seohae}}; height: 2pt"

| colspan = "10" |

The line is being extended southward from Wonsi to Seohwaseongnamyang. Station names may be subject to change as the line is constructed and various sources give conflicting information.{{Cite web|url=http://news.kmib.co.kr/article/view.asp?arcid=0010188366&code=61121111&cp=nv|title = 대곡~소사 복선전철 마침내 첫삽, 2020년 개통|date = 22 December 2015}}