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Colne Valley Viaduct

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427: 435: 419: 33: 1194: 314:, which was also being built for the new line, however this option was dismissed in a report released in February 2015 due to the increased costs and construction time that would be involved. During 2017, Contract C1 (Central 1), which covers the 21.6 km section of the line that the viaduct falls within, was awarded to the 466:
kVa overhead power line, and a reinforcement of a gas mains, along with other measures. Towards the northern end of the viaduct, a temporary construction compound has been assembled, which accommodates offices, plant, employee welfare facilities, and the pre-cast factories for the project. Sufficient
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tonnes, each one unique to its intended place in the overall structure. Assembly will use a match-casting technique with relatively tight tolerance, supported by an adjustable steel formwork and prefabricated steel reinforcement where relevant. While two deck units are to be typically cast each day,
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The Colne Valley Viaduct is intended to be a major civil engineering work of High Speed 2, being amongst the largest and perhaps the most prominent single feature to be constructed during Phase 1. In terms of its basic configuration, it is a gently curved structure along a horizontal radius of 5,280
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During March 2021, construction of the viaduct's foundations commenced, although test piling had occurred before this. Between spring and summer 2021, an internal access road was built, while the onsite factory building the viaduct segments were commissioned during the autumn. During May 2022, deck
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In December 2021, the first six-metre-tall (20 ft) pier for the viaduct was cast. Construction of four jetties across the lake was also completed to support work on the piers that will be built in the water. In June 2022, the bridge building machine was launched. By December 2022, 125 of the
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and the establishment of temporary facilities, including a factory, onsite. Construction of the viaduct commenced during March 2021 with the main deck completed in September 2024 with full completion expected for May 2025. Protestors have occasionally occupied the site, and allegations over the
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Considerable attention has been directed to the viaduct's aesthetic design and to avoid unnecessarily impacting the surrounding landscape and local community. To reduce its impact upon wildlife and the general public alike, four-metre (13 ft) high translucent acoustic barriers are to be
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units are to be integrated into the deck structure of the viaduct. The structure will also feature four expansion joints. The foundations will consist of driven piles upon which the faceted framework is installed; water-based piers are considerably more complex in shape and design.
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in order to prevent HS2 Limited chopping down trees as part of preparatory works at Harvil Road, near to the proposed site of the viaduct. There had been a protest camp next to the road since October 2017, which HS2 began evicting in January 2020.
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The main deck of the viaduct is to be manufactured at a nearby temporary factory, the assembly of which is to commence from the northern end. In total, 908 deck units and 92 pier head units will be produced; weighing between 60 and
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A contract for the section of the railway pertaining to the viaduct was awarded during 2017 and the design concept was released to the public on 19 January 2018. Preparatory work commenced shortly thereafter, including a
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was also bespoke to reduce its visual impact. The exterior concrete surfaces are faceted to provide a more attractive visual and tactile design. However, the viaduct has been subject to criticism from
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centre was required to relocate. Both properties are to be demolished. Various preparatory works were also undertaken during the 2010s, including the diversion of water mains, the realignment of 275
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notes that the site of the viaduct features multiple factors of sensitivity, pertaining to both environmental and public interests, as well as access issues during the construction phase.
786: 615: 561: 380:, at which points its spans are spaced at intervals of 80 metres (260 ft); the majority of over-land spans cover shorter lengths of either 45 or 60 metres (148 or 197 ft). 948: 384:
installed along the entire length of the viaduct; these will reduce noise emissions while only incurring a minimal impact upon the view of onboard passengers. The design of the
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requested that the government pause all preparatory work until the Oakervee Review had been completed and disagreed with HS2 Limited over mitigation works. During March 2021,
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space for the storage and treatment of up to 3,000,000 cubic metres (110,000,000 cubic feet) of chalk slurry has also been provisioned for the construction of the
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the more complex pier head units will each require three days to complete. To appropriately handle rail braking loads,of up to 9,000 tonnes a total of four
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In February 2024, construction was halted for "urgent remedial works" in the week before the launching girder was due to begin crossing the
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As early as 2018, protestors had taken up positions in the Colne Valley to voice their objections to the project. In April 2019, 12
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tonnes will make it the largest railway bridge in the UK. It is one of the largest single civil engineering works of HS2 Phase 1.
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and HS2 Limited came to an agreement in which, in light of written assurances from the latter, the former shall not pursue a
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were considered. One option which was studied as an alternative to using a viaduct was the extension of the nearby
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On 19 January 2018, the design concept for the Colne Valley Viaduct, which was created by Knight Architects and
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into the scheme. Shortly following this decision, full planning permission for the viaduct was secured.
1572: 1299: 1294: 443: 562:"HS2 secures full planning consent for UK's longest rail bridge after council drops legal challenge" 1365: 455: 341: 326: 290: 987: 352: 281:, west London. When completed, its length of 3.4 kilometres (2.1 mi) and a weight of 116,000 1547: 1289: 491: 430:
Colne Valley Viaduct under construction in January 2023 showing the bridge deck cross section.
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metres (17,320 ft), supported by 57 spans and weighing roughly 116,000
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viaduct's aesthetic and environmental impact upon the area have been made.
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Colne Valley Viaduct bridge piers under construction in January 2023.
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for ignoring the needs of local residents. Rail industry periodical
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The final pre-cast deck segment was installed on 5 September 2024.
1038:"HS2 creates the first of 56 giant piers for Colne Valley Viaduct" 487:
Construction reached the half-way point (1.7km) in November 2023.
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is a bridge, under construction as of 2024, which will carry the
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1,000 bridge segments had been placed in their final position.
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In order to clear the viaduct's intended path, a farmhouse was
963:"Work begins to form HS2's Colne Valley Viaduct foundations" 813:"The reality of working on HS2's biggest construction site" 480:
construction commenced from the northern embankment.
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The viaduct crosses over both the 250: 240: 235: 225: 217: 209: 204: 190: 159: 145: 140: 132: 124: 119: 111: 101: 91: 81: 42: 23: 693:"Huge boost as government tells HS2 to start work" 691:Hopkirk, Elizabeth; Rogers, Dave (15 April 2020). 924:Taylor, Diane; Barkham, Patrick (13 June 2020). 755: 753: 678:"HS2 reveals controversial Colne Valley viaduct" 538: 536: 534: 532: 530: 591:"HS2 timeline of major events to 2025 revealed" 576:"HS2 bridge near Watford now Britain's longest" 528: 526: 524: 522: 520: 518: 516: 514: 512: 510: 555: 553: 1220: 544:"Colne Valley Viaduct – HS2's largest bridge" 8: 1032: 1030: 926:"Rise in injunctions against HS2 protesters" 652:"HS2 reveals Colne Valley viaduct concepts" 37:Artist's depiction of the completed viaduct 1416: 1356:Euston Downside Carriage Maintenance Depot 1227: 1213: 1205: 20: 746:. hillingdontimes.co.uk. 19 March 2021. 506: 1042:Planning, BIM & Construction Today 785:Wareham, Stephanie (24 January 2018). 1619:High-speed rail in the United Kingdom 7: 1137:Johnson, Thomas (20 February 2024). 676:Smale, Katherine (19 January 2018). 1655:Railway viaducts in Buckinghamshire 1111:Pearson, Gavin (9 November 2023). 1088:Hakimian, Rob (15 December 2022). 717:Smale, Katherine (6 August 2019). 546:. railengineer.co.uk. 7 June 2021. 386:overhead electrification equipment 198:25 kV 50 Hz AC 14: 879:from the original on 13 June 2020 632:from the original on 26 July 2019 1447:Manchester Piccadilly High Speed 1192: 867:Taylor, Diane (7 January 2020). 826:Topham, Gwyn (8 December 2020). 31: 1420:New/New high speed rail section 16:HS2 Railway Bridge in Harefield 1326:Bodymoor Heath Training Ground 1014:www.theconstructionindex.co.uk 898:Harris, Simon (29 July 2020). 841:Snaith, Emma (27 April 2019). 589:Hakimian, Rob (15 July 2022). 349:Buckinghamshire County Council 306:to traverse the valley of the 146: 1: 1442:Manchester Airport High Speed 947:Horgan, Rob (27 April 2021). 471:to the north of the viaduct. 422:Construction as of April 2024 1250:Aston Church Road Overbridge 811:Horgan, Rob (14 June 2021). 560:Horgan, Rob (1 April 2021). 1665:Concrete bridges in England 1607:Related high speed projects 246:High speed passenger trains 1686: 1660:Bridges under construction 1361:Fox and Grapes, Birmingham 1341:Colne Valley Regional Park 761:"HS2 Colne Valley Viaduct" 271:Colne Valley Regional Park 96:Colne Valley Regional Park 255: 30: 1629:Northern Powerhouse Rail 1427:Birmingham Curzon Street 1068:HS2 News and Information 323:Bouygues Travaux Publics 291:compulsory land purchase 1528:Oxenholme Lake District 1305:Willesden Logistics Hub 1280:Marston Box Rail Bridge 990:. BBC News. 31 May 2022 951:. newcivilengineer.com. 815:. newcivilengineer.com. 680:. newcivilengineer.com. 564:. newcivilengineer.com. 128:2.1 miles (3.4 km) 1432:Birmingham Interchange 1260:Balsall Common Viaduct 1255:Automated people mover 439: 431: 423: 136:10 metres (33 ft) 1310:Wendover Dean Viaduct 967:Global Railway Review 437: 429: 421: 1563:Warrington Bank Quay 1300:Washwood Heath depot 1295:Thame Valley Viaduct 1270:Colne Valley Viaduct 1201:at Wikimedia Commons 1199:Colne Valley Viaduct 1092:. New Civil Engineer 625:. 27 February 2015. 456:compulsory purchased 444:Extinction Rebellion 263:Colne Valley Viaduct 141:Rail characteristics 25:Colne Valley Viaduct 1568:Wigan North Western 342:Grimshaw Architects 327:Sir Robert McAlpine 62: /  1488:Edinburgh Waverley 1170:. 5 September 2024 1143:New Civil Engineer 1117:New Civil Engineer 1044:. 20 December 2021 830:. theguardian.com. 723:New Civil Engineer 595:New Civil Engineer 440: 432: 424: 353:Hillingdon Council 302:Various means for 230:Under construction 218:Construction start 66:51.5859°N 0.4900°W 1642: 1641: 1602: 1601: 1589:East Midlands Hub 1197:Media related to 492:Grand Union Canal 446:protesters began 378:Grand Union Canal 331:VolkerFitzpatrick 275:Grand Union Canal 269:railway over the 259: 258: 1677: 1417: 1366:Jones' Hill Wood 1346:Cubbington Woods 1229: 1222: 1215: 1206: 1196: 1180: 1179: 1177: 1175: 1160: 1154: 1153: 1151: 1149: 1134: 1128: 1127: 1125: 1123: 1108: 1102: 1101: 1099: 1097: 1085: 1079: 1078: 1076: 1074: 1060: 1054: 1053: 1051: 1049: 1034: 1025: 1024: 1022: 1020: 1006: 1000: 999: 997: 995: 984: 978: 977: 975: 973: 959: 953: 952: 944: 938: 937: 935: 933: 921: 915: 914: 912: 910: 895: 889: 888: 886: 884: 864: 858: 857: 855: 853: 838: 832: 831: 823: 817: 816: 808: 802: 801: 799: 797: 791:Bucks Free Press 782: 776: 775: 773: 771: 757: 748: 747: 740: 734: 733: 731: 729: 714: 708: 707: 705: 703: 688: 682: 681: 673: 667: 666: 664: 662: 648: 642: 641: 639: 637: 631: 620: 612: 606: 605: 603: 601: 586: 580: 579: 572: 566: 565: 557: 548: 547: 540: 465: 403: 371: 284: 226:Construction end 199: 185: 183: 182: 178: 175: 167: 148: 77: 76: 74: 73: 72: 71:51.5859; -0.4900 67: 63: 60: 59: 58: 55: 35: 21: 1685: 1684: 1680: 1679: 1678: 1676: 1675: 1674: 1645: 1644: 1643: 1638: 1598: 1577: 1493:Glasgow Central 1456: 1408: 1380: 1331:Calvert Jubilee 1319:Places affected 1314: 1285:Northolt tunnel 1265:Chiltern tunnel 1238: 1233: 1189: 1184: 1183: 1173: 1171: 1162: 1161: 1157: 1147: 1145: 1136: 1135: 1131: 1121: 1119: 1110: 1109: 1105: 1095: 1093: 1087: 1086: 1082: 1072: 1070: 1062: 1061: 1057: 1047: 1045: 1036: 1035: 1028: 1018: 1016: 1008: 1007: 1003: 993: 991: 986: 985: 981: 971: 969: 961: 960: 956: 946: 945: 941: 931: 929: 923: 922: 918: 908: 906: 897: 896: 892: 882: 880: 866: 865: 861: 851: 849: 847:The Independent 840: 839: 835: 825: 824: 820: 810: 809: 805: 795: 793: 784: 783: 779: 769: 767: 759: 758: 751: 742: 741: 737: 727: 725: 716: 715: 711: 701: 699: 697:Building Design 690: 689: 685: 675: 674: 670: 660: 658: 650: 649: 645: 635: 633: 629: 618: 614: 613: 609: 599: 597: 588: 587: 583: 574: 573: 569: 559: 558: 551: 542: 541: 508: 503: 477: 469:Chiltern tunnel 463: 416: 401: 369: 365: 357:judicial review 347:In April 2019, 312:Northolt tunnel 300: 282: 197: 180: 176: 173: 171: 170:4 ft  169: 165: 120:Characteristics 70: 68: 64: 61: 56: 53: 51: 49: 48: 38: 26: 17: 12: 11: 5: 1683: 1681: 1673: 1672: 1667: 1662: 1657: 1647: 1646: 1640: 1639: 1637: 1636: 1631: 1626: 1621: 1616: 1610: 1608: 1604: 1603: 1600: 1599: 1597: 1596: 1591: 1585: 1583: 1579: 1578: 1576: 1575: 1570: 1565: 1560: 1558:Stoke-on-Trent 1555: 1550: 1545: 1540: 1535: 1530: 1525: 1520: 1515: 1510: 1505: 1500: 1495: 1490: 1485: 1480: 1475: 1470: 1464: 1462: 1458: 1457: 1455: 1454: 1449: 1444: 1439: 1437:Old Oak Common 1434: 1429: 1423: 1421: 1414: 1410: 1409: 1407: 1406: 1405: 1404: 1394: 1388: 1386: 1382: 1381: 1379: 1378: 1373: 1368: 1363: 1358: 1353: 1348: 1343: 1338: 1336:Chiltern Hills 1333: 1328: 1322: 1320: 1316: 1315: 1313: 1312: 1307: 1302: 1297: 1292: 1287: 1282: 1277: 1272: 1267: 1262: 1257: 1252: 1246: 1244: 1243:Infrastructure 1240: 1239: 1234: 1232: 1231: 1224: 1217: 1209: 1203: 1202: 1188: 1187:External links 1185: 1182: 1181: 1155: 1129: 1103: 1080: 1055: 1026: 1001: 979: 954: 939: 928:. 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Index


Coordinates
51°35′09″N 0°29′24″W / 51.5859°N 0.4900°W / 51.5859; -0.4900
High Speed 2
Colne Valley Regional Park
Harefield
tracks
Track gauge
Electrified
25 kV 50 Hz AC
Daily traffic
High Speed 2
Colne Valley Regional Park
Grand Union Canal
Hillingdon
compulsory land purchase
High Speed 2
River Colne
Northolt tunnel
joint venture
Bouygues Travaux Publics
Sir Robert McAlpine
VolkerFitzpatrick
Atkins
Grimshaw Architects
Buckinghamshire County Council
Hillingdon Council
judicial review
River Colne
Grand Union Canal

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