Gravel driveways are one of the most common choices for Western Washington rural and suburban properties, where the average driveway lengths are many times the length of a city driveway. In many cases, concrete or asphalt surfacing can be cost prohibitive for a lengthy driveway. Gravel is a good choice as it is relatively cost effective, is durable and can be manipulated when necessary. Material terminology is important so you know what to expect and what to order when you need to. Aggregate size refers to the size of the rock material, so a 5/8 washed rock order will be composed of rock material approximate 5/8” in size. Minus material refers to the fines in compactable gravel mixes. Fines are essentially rubble debris that occurs during the crushing process. Fines allow for gravel material to compact. One of the most common compactable gravel is 5/8 minus material, so it...