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Cheshire, Oregon: Before & After

Cheshire was an excellent opportunity to put the B-Series Extra Heavy Duty Model to the test because it meant rebuilding this road from below the bottom - up, using 7”, 5”, 1-1/2” and 3/4” open & minus quarry rock. We then leveled the surrounding construction damage as well as the road. Beautiful isn’t it?

Because of extensive flooding over the turn in this road it was decided to channel the surface water underground into 6” Perforated N12 ADS pipe, strong enough to handle weight of road, 30” deep in a 30” wide trench, lined with a Geo-Textile to prevent sediment filling the air space in the drain rock. The surface water would mix with the wall of water moving down the side of the mountain through the clay soil, like a silent invisible ocean, underground. The $100,000.00 horse training arena 20 yards above this turn was totally ruined because of a failure to consider proper drainage. A thousand acres of runoff is partially focused at this point.

The drain pipe channels this water into a huge lined dry well 11’ x 9’ x 10’ deep.

After lining the trenches and dry well with a Geo-Textile to protect the drain rock and pipe from filling with sediment, the 6” N12 ADS pipe is installed and secured to a 3”, 3/4” open base rock surface, with 12” steel spikes and wire to limit any floating until haunching and filling with 1-1/2” open drain rock. Primary filter drain out into the dry well is done with a couple T-Saddles connecting the 6” N12 to the perforated 12” N12 ADS pipe installed vertically in the dry well with end caps. A plate compactor is used to pack down the rock to prevent settling and protect the pipe and fabric.

After filling the trenches and the dry well with the drain rock everything is wrapped and taped until a layer of rock can be spread over the fabric to help protect it before rebuilding the road over the top of the new drain system.

Finally we determine the desired grade for this type of turn and it’s preferred speed. We begin building up the outside edge with 7” rock then fill in with 1-1/2”-0 rock and finish it off with 3/4”-0 and finally roll it out with a vibratory compactor. Only thing left to do is level and finish off the surrounding construction damage for reseeding and recovery. Since then there has been no problem with any flooding or any water even visible in this area.

NOTE

If you see water moving above ground, the odds are that there is water moving below ground in the same direction. To stop it or get rid of it requires draining the water with a wall of drain field rock as deep as you want dry below the dry wall or establishing a dry well that will pull the water out of a specific area. One problem with dry wells is that they pull and drain water at the possible expense of killing a lawn if you don’t supplement enough water to keep it wet during the dry months of the year. O well.

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