Installing water bars
This web article explains
how forest workers and landowners can use water bars to control
erosion after a timber harvest.
Water bars are
a combination of a mound and trench angling across the road to
intercept and disperse water flowing down the road surface. Because
they form a significant, almost impassible bump in a forest trail,
they are placed where machinery will no longer travel. If the
landowner wishes to continue using wheeled equipment on the road
for recreation or obtaining firewood, broad-based dips can be
substituted for waterbars.
The idea is to divert
water off the road and into a more stable vegetated area.
Water bars are built
at a 30 degree angle to the road course. The distance between
water bars will vary from every 250 feet on gently sloping trails
to every 40 feet on steep trails.
The height of the mound
will also vary from 8 - 30 inches; lower on gentle slopes, higher
on steeper slopes.
To complete the construction,
the runoff area at the bottom edge of the water bar should be
stabilized with coarse stone or seeded grass.