Progress slowed just a tad, but stuff is still going on. Worked on the Natural Arch bridge. This is the fourth incarnation, with the first one built on the original layout in 2005, rebuilt in 2006 for the added mule path, torn out and replaced with the big Desert redo of winter '08, and then replaced yet again with the current one (the one before it, even though was brand new, gave me some envelope clearance issues).
The new Natural Arch Bridge is made out of a rigid wood structure draped in aluminum foil and then covered in a layer of celluclay. Celluclay is dry papier mache type material that turns into a malleable wet clay when water is added. Even though it take a few days to dry, it forms a very hard and appropriately textured surface. Here is the bridge already with a layer of set celluclay on it--the light colored stuff-- and some fresh stuff applied today--the dark. (Look you can even see the big 'ol bag of dry celluclay in the back; this stuff ain't cheap--$25 a bag! But hey, it works pretty good)