Maricopa County

low volume roads

Frequently Asked Questions

What is a PM-10 road?

A PM-10 road is a county maintained dirt road within the non-attainment area.

How does a road get to be a PM-10 road?

MCDOT counts traffic on all county roads to generate a list of the most traveled dirt roads in the county. A specially appointed team of MCDOT engineers and planners evaluates each of the roads on the list to determine the order in which they will be paved. Future paving determinations will be made as soon as the new traffic counts have been complete as well as prioritized by MCDOT.

What is a non-attainment area and what are its extents?

The non-attainment area is the portion of the Valley that the EPA has designated for PM-10 reduction. Its boundaries run approximately from the westward boundary of Rooks Road east to Meridian Road and from the south boundary of Hunt Highway north to Jenny Lin Road.

How do we get the road in front of our home accepted as a "county road"?

According to A.R.S., 28-6705, roads or streets shall be laid out, opened, and constructed without cost to the county before they can be taken into th ecounty's maintenance system. Therefore, property owners in unincorporated areas that reside along designated local or collector roads are responsible for building those roads to meet the county road design standards and apply for acceptance. See Improvement Districts.

Who will own and maintain the roads after they are paved?

Maricopa County will own and maintain the roads. The County will purchase all necessary right-of-way to construct the roads. Upon completion of construction the County will conduct periodic maintenance, as needed, to keep the roadway up to county standards.

If any of my property improvements, such as walls, landscaping, or mailboxes are in the roadway, will I have to move them at my expense or will the County pay for it?

If the property is within existing right-of-way then the property owner is typically responsible for moving the object. If the County purchases the right-of-way for the roads that include your improvements the County will pay to move them to the new right-of-way.

What can I do to decrease the generation of dust on our road until then?

The most effective way to reduce the generation of dust is to slow down when traveling on it. Traveling at a slow speed will generate less particulates in the air.

Will paving these roads affect my tax rate?

Property owners will not be assessed for the road paving. The paving is to be financed by the State and Federal gasoline tax revenues. Whether or not a property's assessed valuation is increased due to living along a paved road as compared to a dirt road will be determined by the County Assessor's Office.

What is the EPA?

EPA stands for the United States Environmental Protection Agency. For additional information visit them at:

What does the EPA have to do with paving of dirt roads here in Maricopa County?

EPA is charged with enforcing the provisions of the Clean Air Act and its amendments. The Clean Air Act requires EPA to establish and enforce air quality standards for a number of pollutants. Particulates are one pollutant, describing all forms of particles in the air.

As a resident, can I pave the road in front or out to my house?

Yes, however, there are two possible issues that must be addressed is the proposed paved road across private property or across publicly dedicated right-of-way? This will determine whether you need permission from neighbor(s) to cross their property and a permit from county Planning and Development or a permit from MCDOT.

How do we obtain a permit from MCDOT to pave a road?

Contact MCDOT Development Services at (602) 506-8792 for current permits requirements.

What kinds of materials will the roads be paved with?

The roads are composed of a gravel base depth up to 6 inches thick and double chips sealed or structural equivalent.

What is chip sealing?

Chip sealing is an economical road building and maintenance procedure that reduces pot holes by sealing moisture out of the road and is less expensive that overlaying.

The chip sealing process begins by applying thick oil called asphalt emulsion to the prepared road surface and is immediately followed by a computer-operated chip spreader that spreads chipped rock onto the emulsion. The road is embedded in the emulsion by rollers. At this point, the road is ready for use.

Will I be able access my home and property during road paving or grading operations?

Chip-sealed roads can be driven on almost immediately after the surface is applied. Chip seal us an extremely cost efficient road-surfacing product that economically provides a skid-resistant surface.

Are you planning to fix the drainage problems in the front of my home?

Only drainage needed to protect the roadway and prevent aggravating existing problems will be done.