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It was time to change the mountain division of the Patapsco Valley RR. This division has not changed in several years and was a part of the original plan. It was nice to have trains climb up to the top of the mountain and descend back to the station. However, starter sets and conventional trains could not run on this line. I decided to add two levels track and a new tunnel. Construction started in March of 2007.
The first five pictures show the mountain subdivision before the construction.
The next 7 pictures show the completion of bottom line, and where the remains of one of the mountains where the line descending by the lake. A curved tunnel was added which provided platform for the upper line. The upper line used real trax and was supported in some sections by the MTH trestles.
The last 9 pictures show the formation of the mountains and the slopes between the upper and lower lines. All the Real Trax trestles were covered using paper and plaster cloth. Hydrocal was used to reinforce the plaster and to add texture. The curved tunnel has a portal on one side to allow additional access.