Editing Great Eastern Main Line (section)

=== Tunnel and viaducts ===
Major civil engineering structures on the Great Eastern Main Line include the following:<ref name=":0">{{Cite book|title=Railway Track Diagrams Book 2 Eastern|last=Brailsford|first=Martyn|publisher=Trackmaps|year=2016|isbn=978-0-9549866-8-1|location=Frome|pages=2, 5–7}}</ref>
{| class="wikitable"
|+Tunnel and viaducts on the Great Eastern Main Line
!Railway Structure
!Length
!Distance from [[Liverpool Street station|London Liverpool Street Station]]
!Location
|-
|[[Trowse Bridge|Trowse Swing Bridge]] ([[River Wensum]])
|
|123 [[mile]]s 37 [[Chain (unit)|chains]] (via Cambridge)
|[[Norwich railway station|Norwich]]
|-
|Lakenham Viaduct (including [[River Yare]])
|8 chains (c. 160 metres)
|112 miles 33 chains – 112 miles 25 chains (via Ipswich)
| rowspan="2" |Between Norwich and [[Diss railway station|Diss stations]]
|-
|Thraston Viaduct (River Tas)
|
|105 miles 62 chains (via Ipswich)
|-
|[[River Waveney]] Viaduct
|
|94 miles 54 chains (via Ipswich)
|South of Diss station
|-
|Badley Viaduct ([[River Gipping]])
|2 chains (c. 40 metres)
|79 miles 09 chains – 79 miles 07 chains (via Ipswich)
|Between Stowmarket and Needham Market stations
|-
|Ipswich or Stoke Tunnel (see note below)
|361 yards (330 metres)
|68 miles 47 chains – 68 miles 31 chains
|South of [[Ipswich railway station|Ipswich station]]
|-
|Cattawade Viaduct
|4 chains (c. 80 metres)
|60 miles 10 chains – 60 miles 06 chains
| rowspan="2" |East of [[Manningtree railway station|Manningtree station]]
|-
|[[River Stour, Suffolk|River Stour]] Viaduct
|4 chains (c. 80 metres)
|59 miles 75 chains – 59 miles 71 chains
|-
|Lexden Viaduct ([[River Colne, Essex|River Colne]])
|6 chains (c. 120 metres)
|49 miles 69 chains – 49 miles 63 chains
|West of [[Colchester railway station|Colchester (North) station]]
|-
|[[River Ter]] Viaduct
|
|35 miles 22 chains
| rowspan="2" |Between [[Hatfield Peverel railway station|Hatfield Peverel]] and [[Chelmsford railway station|Chelmsford stations]]
|-
|Boreham Viaduct
|3 chains (c. 60 metres)
|32 miles 72 chains – 32 miles 69 chains
|-
|[[River Chelmer]] Viaduct
|
|30 miles 25 chains
|East of [[Chelmsford railway station|Chelmsford station]]
|-
|Chelmsford Viaduct
|24 chains (c. 480 metres)
|29 miles 64 chains – 29 miles 40 chains
| rowspan="2" |West of Chelmsford station
|-
|[[River Can]] Viaduct
|3 chains (c. 60 metres)
|29 miles 36 chains – 29 miles 26 chains
|-
|Ilford or Aldersbrook Flyover
|
|6 miles 78 chains
|West of [[Ilford railway station|Ilford station]]
|-
|Bethnal Green Viaduct
|1 mile 6 chains (c. 1730 metres)
|1 miles 58 chains – 0 mile 52 chains
|Bethnal Green
|}

====Stoke tunnel====
The only tunnel on the line is immediately south of {{rws|Ipswich}} station. The {{convert|361|yd|adj=on}} long tunnel was built by [[Peter Bruff]] as part of the [[Ipswich to Ely Line|Ipswich & Bury Railway]]. It was completed in 1846 and it is thought to be the earliest driven on a sharp continuous curve.<ref>{{cite book|author=Moffat, Hugh|title=East Anglia's First Railways|publisher=Terence Dalton|location=Lavenham|year=1987|isbn=0-86138-038-X}}</ref> During the excavation of the tunnel, many important fossils were discovered, including rhinoceros, lion and mammoth; the site was known as the "Stoke Bone Beds".<ref>{{cite web|url=http://www.sevenwondersofipswich.co.uk/wonders/show.php?num=5|title=Mammoth on High Street|work=Seven Wondered of Ipswich|access-date=30 March 2010}}</ref> The finds are considered important in understanding [[Climate change (general concept)|climate change]] during the [[Last Glacial Period|Ice Age]].<ref>{{cite web|url=http://www.ipswich.gov.uk/site/scripts/documents_info.php?documentID=694&pageNumber=7|title=Collections:Geology|publisher=Ipswich Borough Council|access-date=30 March 2010}}</ref> This tunnel had the trackbed lowered so the line could accommodate taller freight trains.