In 2003, Forster and Solomon (Observations of a weekend effect in diurnal temperature range, PNAS, [ http://www.pnas.org/content/100/20/11225.full ]) reported: we find evidence of a weekly cycle in diurnal temperature range (DTR) for many stations in the United States, Mexico, Japan, and China.
The total cost to have a concrete retaining wall installed will be a combination of material and labor prices. For a basic wall you can expect to pay between $30 and $40 per square foot.
Masonry construction unit cost for 8 concrete block or cinderblock walls. Unit Size. One square foot. Labor Costs. We figure about 12 square feet of wall per hour of mason time (about 15 blocks laid), plus one laborer hour for every 40 square feet of blocks installed.Material Costs. For one square foot it takes 1.125 blocks plus about 8% waste factor.e figure about 12 square feet of wall per hour of mason time (about 15 blocks laid), plus one laborer hour for every 40 square feet of blocks installed. Material Costs. For one square foot it takes 1.125 blocks plus about 8% waste factor.