Building the Creek

On the Duncan's Mills side of my micro-layout I wanted the tracks to run over a little creek. The bridge is to be concrete arch. Really more of a big culvert than a bridge.

The track was laid over the 1/2" gatorfoam sub-roadbed and ballasted.  The creek bed was roughed in with pieces of foam. The two sides of the arch were made out of a sheet of 1/4" balsa.  The balsa was painted a concrete gray and weathered with an ink wash.  A cap of 3/8" balsa was added.  There actually is no bottom to the arch but since the viewpoint is restricted to head on it is hard to see this. I carefully trimmed the sides of the subroadbed so that arch would fit. I cut slots in the foam scenery of the creek for the balsa side to slot in to and then glued the balsa pieces in place.  The sides of the creek were coated with light-weight spackle to blend in the arch.  I embedded a some real rocks in the spackling and added a layer of gravel to form the creek bed.  The creek was painted with daubs of grays and browns of craft store paint when the spackle was dry. Some sand was used to fill in the spaces between the rocks.  After the paint dried over night I saturated the whole creek bed in dilute matte medium to glue everything together.  To make the water I used gloss medium with a tiny amount of green paint mixed in. Over several days I built the gloss medium up to form several layers to give it some thickness.

To finish the scene I painted the backdrop to show a river valley for the creek receding in to the distance. I added a few bushes and some grass and then finally planted some fir trees from Canyon Scenics.  The effect of the creek and trees is to make it feel like the railroad disappears off the scene and really does a nice job of making the 12" tail track seem a lot bigger.

The completed creek scene.

The creek scene from above to show how it is constructed.

Painting a backdrop

Putting up the divider

I built a divider down the middle of the module to separate the two scenes on either side.  One side is Sausalito which was the southern terminus and the spot where ferries to San Francisco left.  The signature backdrop scene for Sausalito is the vista of Mt. Tamalpais with the town of Mill Valley nestled in its foothills.

On the other side is Duncan's Mills (how could I resist given my name is Duncan too). It is where the deep redwoods give way to the drier coastal golden grass hills.  I wanted to piant a scene that reflected that.

First I put on a coat of white gesso in to which I had mixed a very small amount of blue.  The gesso gives the surface some tooth to make it receive paint better.  Before this was dry, I put a thin line of blue across the top and then mixed it downwards with X strokes.  You can see this technique by the master of quick landscapes, Bob Ross.  Just search his name on YouTube.

Over this I painted with acrylic colors. I mixed in some slow-drying media to give me some time to blend the colors.  Otherwise acrylics dry too fast to blend. As the colors recede you want to mix in some light blue sky color and some Payne's grey to represent the depth of the atmosphere. on the side of the hills in shadow you can add some blue and some Payne's grey to represent the bluer, darker light of the shadows.  Similarly add yellow and white to the lighter side.  Distant hills get very little color added so that the highlights and shadows are just a little different from the basic blue-grayed base color.
this kind of painting is complicated by the fact that as the acrylics dry, they will become darker and while wet you cannot always clearly see the difference in color that will appear later. So some faith that the differences are there is needed while painting and some experience is needed. However, you can always paint over wiht a new color so I try to get the forms right first in a close color and then change them later with a second coat to something I am happier with.  Finally, accidents are your freind in this kind of painting.  Often just daubing colors from a pallette in the general places gives you a really nice effect and is more successful than trying to carefully paint "within the lines".  Release your inner Guagain and go impressionistic!

A divider down the middle was added and some carved foam scenery.  Then I got out the paints and had fun. First I covered the layout with building paper and just used this as the palette to mix the paints right on the paper.  I didn't take any photos of this colorful mess. Oh well.

 

Mt. Tamalpais as seen from the Sausalito direction scene.  Tamalpais means the sleeping maiden in Miwok.

Dunca's Mills scene is more made up as there really is no signature scene like at Sausalito that I know of.  Its been a long time since I was there and I couldn't find many photos on the web of the scenery in the area.  I painted a woody gorge leading up the bridge on the right and some grass-covered hills on the left.  the bridge was made from a piece of balsa wood painted to look like concrete.  The rocks are all carved foam to keep the weight down.  they are then painted by stippling on various grays, umbers and siennas of craft-store paint.  the trees were painted from green craft-color paints using a fan brush and dabbing the colors on - not stroking. Use a dark green for the body of the tree and then add some lighter green highlights.

Making the roadbed from gatorfoam

Making the roadbed from Gatorfoam

I built the module out of 1/2" Gatorboard which I got from foamboardsource.com.  It is a truly excellent material to work with - strong and light.  I cut it with a utility knife.  For straight cuts I use a straightedge to guide a light cut and then cut it fully with a couple more strokes.
I put the pieces together with deck screws and yellow glue.  The pieces I used were smaller than my 4' x 6.5' base size so I laminated 2 layers of overlapping pieces held together with glue and 1" screws. The whole thing is light and strong.  I can easily pick up and carry the module by myself.  Since we put our modules on folding tables, there was no need for legs.  If I was to put on legs I think I would use some aluminum channel on the bottom to support them.  Also this being a dead-rail module, there is no wiring to put underneath so I didn't make a space for wires.

The tools I use to assemble the sections of 1/2" gatorfoam together.  I bought the gatorfoam in smaller pieces so they could be shipped UPS and saved considerable money.

Glue is spread where the sections overlap. I use Titebond II, a yellow wood glue.

The overlapping sections are screwed together to hold them while the glue sets.

The base is all glued up.  I made up the subroadbed which will be raised up over the base with risers by laying it on the base.

The plan has been printed out full size on paper sheets. These are carefully trimmed and then taped together.  For easier handling I made the plans in to 3 subsections - each town and the connection between.

The taped together plan is laid over subroadbed and the smaller sections taped together to make the final plan.

With the plan laid over the subroadbed, we are ready to punch holes about every inch with a sharp awl to mark the centerlines and the edges of the subroadbed where we want to cut it away.

Ready to lay track. It is hard to see but there are centerlines narked for the track in order to lay it accureately.

  

The track has been laid and we are running trains!