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We begin the next stage of our journey along the Nice to Digne les Bains line at Colomars Station. The modern halt is on a section of railway line which was not part of the original alignment. The as-built alignment had to accommodate access for the branch-line to the bridge over the River Var and had to allow for a height gain to permit trains to travel over the top girders of the truss-bridge over the Var.
Tramway services left Plan du Var Station travelling North and diverged from the Nice to Digne line before reaching the Vesubie River. The images below are old postcards of the location of the junction and show the development of the site over a number of years. Initially a stone arch bridge took the road over the Vesubie, but when this failed it was replaced by the concrete arch bridge visible in some of the pictures.
After a detour to look at the metre-gauge TAM tramway from Plan du Var to St. Martin Vesubie we continue along the main line toward Digne. We board the train once again and head North from Plan du Var. ..... North of the Station the line crosses the River Vesubie and continues on the east side of the River Var towards Chaudan, about 2 kilometres north of Plan du Var. .......
Before the tramway was constructed the Charles Albert Bridge was a suspension bridge (built by Marc Seguin in the mid-19th Century) [2] but this bridge was not designed to accommodate tramway loading. In 1913 it was rebuilt to accommodate the trams, just as was necessary with the Pont de la Mescla on the Tinée tramway. The replacement structure had six spans of over 30 metres in concrete built by the company Thorrand. In the foreground of the image immediately below, there is the Pont-Charles Albert stop and the lime kilns at La Lauziere overseen by the perched village of La Roquette sur Var, © Yann Duvivier. [6] This 'new' bridge was replaced in the mid-20th Century by the one which is in use today.
I first looked at this tramway in 2013. It was only a short blog recognising the existence of the line in the valley.
https://rogerfarnworth.wordpress.com/20 ... nee-valley.
This line was 26.5 Km long and connected villages in the Tinée valley to Nice to Digne line. Like other lines of the Tramways Alpes Maritimes (TAM), the electric current was single phase. The civil engineering works (bridges, tunnels) were executed by the Department.
The line was built in 1911 and operation started on 1st April 1912. Landslides affected the operation of the line in the early months. The original opening was delayed from January to April because of landslides and on 2nd April a further landslide affected several hundred metres of track and destroyed power lines.
The line ceased operations in 1931.
Beyond La Mescla the railway continues to hug the river bank on the South West side of the River Var. The satellite image below shows the extent of quarry workings on the north bank of the river associated with Lafarge Bétons Centrale Malaussène (Construction Material Wholesaler)! Two bridges are visible in the satellite image. The first in the bottom right crosses both railway and river, the second appears to be an internal industrial bridge across the river.
The line from Le Pont de Gueydan north to Guillaumes followed the valley of the River Var and ran through the Gorges de Daluis.
Marc Andre Dubout, writing in French, says that the line was probably the moist daring of secondary line construction work with very steep gradients, numerous tunnels, two remarkable bridges. He comments that it is the most impressive tramway from a tourist perspective with 'unique viewpoints and singular landscapes'.
The first two significant structures on this section of the line are a bridge which carries the N202 over the railway and then the Tunnel de Saint Benoit which is also known as the Tunnel du Pont de la Reine Jeanne and is curved in plan and 110 metres long. This tunnel's north-east portal is a matter of metres from the road bridge.
Our journey along the Nice to Digne line recommences at Annot. We are halfway between Nice and Digne. My memory of travelling on the line is that Annot was touted as being an excellent destination when travelling from Nice, to allow access to mountain walking. A little research shows that to be the case. The map below is a copy of the hiking route map which includes an extensive range of walks. The ".pdf" from which it is taken can be accessed by following the link in the references at the bottom of this post. The train we travelled on through Annot to Digne in 2001 was full of hikers who left the train at Annot.
On 5th November 1994 an extreme flood event caused the lowest and the second-lowest dams on the Var to collapse. The flood wave inundated parts of Nice, including Nice’s international airport which is situated near the river mouth. It was out of service for several days. The airport lost the business of 50,000 passengers, with damages running up to an estimated 4.5 to 6 million euro. Elsewhere roads like the RN202 were cut, power and telephone lines were interrupted, and three people died and four disappeared. This estimate of lives lost is low compared with some, for instance HydroEurope say that 70 people were estimated to be killed, with large scale infrastructure damage and economical losses from the closure of the airport. The economic damage is estimated at 550 – 800 million Euros. Of the three most recent flood events the flows of 1994 were an order of magnitude higher than the others - 1994 (3680 m3/s), 2011 (1330 m3/s), 2016 (1280 m3/s).
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