The USDI Bureau of Land
Management (BLM), has thousands of miles of dirt and gravel
roads to maintain in remote areas far from road maintenance
crews. BLM crews and road contractors in the southwest have
been using EMC SQUARED® System treatments to stabilize
soil and aggregate materials for dirt and gravel roads,
remote landing strips and to armor newly placed aggregate
surfacing for roads that run through arroyos where seasonal
overtopping with flood waters cannot be avoided. These stabilized
road surfaces undergo overtopping, for a period of days
in some cases, without significant loss of aggregate surfacing.
Pictured here is a section
of stabilized all-weather gravel surfaced road, connecting
St. George, Utah, with the north rim of the Grand Canyon.
Starting with this section in 1996, the BLM road maintenance
crew hauled in new aggregate surfacing for six miles of
road, mixed in the EMC SQUARED System stabilizer treatment
and then applied an emulsion armor coat to the compacted
surface. This section included over a mile of road with
a ten percent grade. Fourteen years after construction,
the BLM engineer in charge reports that the stabilized road
still provides safe all-weather support on the steep grades
even during the wettest weather conditions. Additional sections
of this road have been sequentially upgraded with stabilized
aggregate surfacing and treated soil surfacing as funding
has permitted. These are severe service conditions, far
beyond the capabilty of lime and cement treatments which
must be protected by asphalt or concrete pavement surfaces.
Continuing utilization of the EMC SQUARED System on unpaved
BLM road systems is testimony to the broad spectrum effectiveness
and durability of EMC SQUARED System treatments.