An diofar eadar na mùthaidhean a rinneadh air "Pont Grog y Borth"
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== Togail ==
Mus robh an drochaid deiseil ann nan 1826, cha robh ceangal stèidhichte ann eadar an t-eilean is thìr-mòr. Bhathar a' cleachdadh [[aiseag]]an tharsaing air an uisge a bha a' sruthadh gu cunnartach ann am [[Menai Strait]]. B' e reic crodh an gnìomhachas a bu chudromaiche a bha anns an eilean. Airson an giùlan do na margaidhean air tìr-mòr, fiu 's gu [[Lunnainn]], chaidh an gluasadh don uisge gus snàmh thairis air a' chaolas. Bha sin gu math cunnartach do na beathaichean, bha daonnan feadhainn dhiubh air caill. <ref name="Bartlett">{{cite book|last1=Bartlett|first1=W. H. |last2=Harding|first2=J.D.|last3=Creswick|first3=T.|title=The Ports Harbours Watering Places |url=http://books.google.com/?id=NC3OxE-4t6AC&pg=PT289&dq=Menai+Bridge#v=onepage&q=Menai%20Bridge&f=false|year=2009|edition=Reprint|publisher=BiblioLife |isbn=1-115-95868-2}}</ref> Bhathar a' faighneachd den [[innleadair]] Thomas Telford, suirbhidh a dhèanamh gus rathad a thogail eadar Lunnainn is [[Caergybi]], an t-àite as faisge do dh'[[Èirinn]] agus aon de na prìomh puirt-mara airson aiseagan gu [[Baile Átha Cliath]]. Bha Telford a' moladh drochaid a thogail thairis air Menai Strait bho àite faisg air [[Bangor]] air tìr-mhòr chun a' bhaile [[Porthaethwy]] (a tha aithnichte an-diugh mar Menai Bridge) air
Air sgath 's na bruachan arda agus sruthadh luath an uisge anns a' chaolas bhiodh e gu math doirbh cidhe a thogail no stacan a chur gu sàbhailte anns a' ghainmhich ghluasadaich air bonn na mara. Fiu 's ma dh'fhaodadh sin a dhèanamh bhiodh iad nan cnapan-starra do na [[bàta]]ichean. B' fheadar an drochaid a bhith àrd gu leòr airson na bàtaichean-siùil. Mar sin mhol Telford drochaid crochaidh a thogail agus dh'aontaich am Pàrlamaid ris na beachdan aige.<ref name="Bartlett"/>
Construction of the bridge, to Telford's design, began in 1819 with the towers on either side of the strait. These were constructed from [[Penmon]] limestone and were hollow with internal cross-walls. Then came the sixteen huge chain cables, each made of 935 iron bars, that support the {{convert|176|m|adj=on}} span.<ref>{{cite book |title=A Memoir of Suspension Bridges: Comprising The History Of Their Origin And Progress |url=http://books.google.com/books?id=Hw8LAAAAIAAJ&pg=PA46 |last=Drewry |first=Charles Stewart |year=1832 |publisher=Longman, Rees, Orme, Brown, Green & Longman |location=London |pages=46–66, and [http://books.google.com/books?id=Hw8LAAAAIAAJ&pg=PT11 Plates] |accessdate=2009-06-13}}</ref> To avoid rusting between manufacture and use, the iron was soaked in [[linseed oil]] and later painted.<ref name="Anglesey history">{{cite web|url=http://www.anglesey-history.co.uk/places/bridges/|title=Menai Strait Bridges|last=Kovach|first=Warren|year=2010|work=Anglesey history|accessdate=27 July 2010}}</ref> The chains each measured {{convert|522.3|m|ft}} and weighed 121 tons. Their suspending power was calculated at 2,016 tons.<ref name="Bartlett"/> The bridge was opened to much fanfare on 30 January 1826.<ref name="Bartlett"/>
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