Street Milling

what is it, why is it done, how long will it take?

Street Milling

 What is Milling?  Milling a street is the process of removing a specific amount of asphalt from the street in preparation for installing a new top section of asphalt on the street or an additional section of asphalt called an overlay.

Why is milling done?  When a new subdivision is built, all the construction traffic for the new homes is concentrated in the new subdivision.  This is a large amount of traffic, and this type of traffic does considerable damage to the surface of the street.  If left this way a new street would look ten years older in one construction season.

 When is milling done?  To combat this problem it is the City’s requirements that the final surface, or top lift, of asphalt not be installed until 80% of the homes in a new subdivision are completed.  The streets are constructed with the full design thickness, but with a 1% crown in the center.  When the top lift is installed the street will have a 2% crown in the center.  This is why the edge of the street is milled down and not the entire street.

How long will this take?  This depends on the amount of work to be done.  Construction crews are required to post “No Parking” signs along the street 24 hours before starting the milling and paving.  In some cases the street will be milled and then repairs to the concrete sidewalks must be made before doing the asphalt overlay or top lift.  However, the “No Parking” signs should be removed until the asphalt work will start and again have a 24 hour notice before starting on the overlay.  

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