Rhoslyn Bridge
[edit] Lower section
| Rhoslyn Bridge | |
| Previous Station | Tan y Bwlch |
| Previous Location | Campbell's Platform |
| Status | In Use |
| Next Station | Dduallt |
| Latitude | 52:57:33N |
| Longitude | 3:58:09W |
| Grid Reference | SH678420 |
Grid Reference :SH678420 Lat / Long :52.95909 / -3.96918
| Deviation Locator | |
| |
|---|---|
| Towards Porthmadog | Campbell's Platform |
| Toward Blaenau Ffestiniog | Dduallt |
During the planning and execution of the deviation, a site, No. 4 was created for organising the spoil, and subsequent erecting of the bridge. Click here for more pictures of that time.
Rhoslyn Bridge allows the line to cross over itself at Dduallt and gain sufficient height to by-pass Llyn Ystradau. It crosses the old line at a narrow cutting just south of Dduallt station. It was necessary to cut back the cutting walls to allow for the supporting columns of the bridge.
[edit] Upper Section
| Rhoslyn Bridge | |
| Previous Station | Dduallt |
| Status | In Use |
| Next Station | Tanygrisiau |
| Latitude | 52:57:33N |
| Longitude | 3:58:09W |
| Grid Reference | SH678420 |
Grid Reference :SH678420 Lat / Long :52.95909 / -3.96918
| Deviation Locator | |
|
| |
|---|---|
| Towards Porthmadog | Cei a'r Bont |
| Toward Blaenau Ffestiniog | Barn Site |
The eight columns, with cross-beams between each pair to form the four piers, were cast in situ in early January 1969 by a team from Westminster School under the direction of John Grimshaw and Bunny Lewis with John Harrison as loco driver and winchman. Ready-mixed concrete was delivered to Tan-y-bwlch and railed up the the site in skips, to be poured into the shuttering.
Temporary spans were installed in autumn 1969, enabling material from Barn cutting to be carried over to complete Cei a'r Bont.
The temporary spans were removed in October 1970, and replaced by Dow-Mac prestressed concrete beams in January 1971. In March the deck was concreted using ready-mix delivered to Tan-y-bwlch and taken to site in Hudson wagons lined with polythene sheeting. Waterproofing of the deck and fitting of railings followed later.
Two locator blocks dependant on if you are underneath or on top!
