According to Wikipedia, Utility location is the process of identifying and labeling public utility mains that are underground. These mains may include lines for telecommunication, electricity distribution, natural gas, cable television, fiber optics, traffic lights, street lights, storm drains, water mains, and wastewater pipes.
· APWA Uniform Color Codes.
· RED – Electric Power Lines, Cables, Conduit, and Lighting Cables.
· YELLOW – Gas, Oil, Steam, Petroleum, or Gaseous Material.
· ORANGE – Communication, Alarm or Signal Lines, Cables, or Conduit.
· BLUE – Potable Water.
· GREEN – Sewers and Drain Lines.
· WHITE – Proposed Excavation Limits or Route.
The U.S. has more than 1,382,569 million miles of pipeline delivering trillions of cubic feet of natural gas and hundreds of billions of tons of liquid petroleum products each year. It’s been estimated that if all the natural gas pipelines in the U.S. were connected to each other end-to-end, it would reach to the moon and back almost three times.
· Gas line to house: 18-36 inches
· Electric line to house: 18-36 inches
· Phone and cable: varies too much to mention (I’ve seen these at 3 inches - and 24 inches deep and all depths in between)
· Water Main: depends on climate and frost line (a call to your local builder - - department will give you the typical depth)
· Sewer: based on design of the system in order to obtain gravity flow to the - treatment plant (or pump station)
Bioretention is the process in which contaminants and sedimentation are removed from stormwater runoff. Stormwater is collected into the treatment area which consists of a grass buffer strip, sand bed, ponding area, organic layer or mulch layer, planting soil, and plants. Runoff passes first over or through a sand bed, which slows the runoff's velocity, distributes it evenly along the length of the ponding area, which consists of a surface organic layer and/or groundcover and the underlying planting soil. The ponding area is graded, its center depressed. Water is ponded to a depth of 15 cm and gradually infiltrates the bioretention area or is evapotranspired. The bioretention area is graded to divert excess runoff away from itself. Stored water in the bioretention area planting soil exfiltrates over a period of days into the underlying soils.