“Riprap” describes a type of crushed limestone often used to combat erosion. Limestone is a sturdy rock that isn't as affected by rainy conditions as others sediment types, which makes it one of the most popular choices for shoreline properties.

There are four main types of riprap, and the easiest way to tell them apart is by their size. Each riprap type offers its own advantages in particular situations, so it's important to choose the right one for your project. Learn more about these variations and which option will best suit your project below.

4 Types of Limestone Ripraps & Their Most Popular Uses

1. Type A

Type A riprap is a great choice for steep slopes because of its hefty size and ability to stay in place while stacked. With measurements of 18 by 30 inches, it's the first choice for protecting or restoring large areas prone to drainage issues—such as alongside bridges and banks that have suffered severe erosion.

2. Type B

Type B riprap is also designed for high-velocity slopes. This limestone size—which is around 12 by 24 inches—is used for many of the same projects as its type A counterpart. However, in most instances, these surfaces suffer from less erosion.

3. Type C

Type C is one of the most popular types of limestone riprap because of its average size. These 6-by-18-inch rocks are perfectly matched to moderate-velocity slopes such as creeks, river banks, and retaining walls.

4. Type D

Type D is the smallest variation of riprap, with an average measurement of 4 by 12 inches. Unlike other options, it isn't usually used for controlling erosion on sloped areas. Instead, it's used as a base. If you're attempting to save soil in ditches or bonds, type D riprap is a great choice.

If you have an upcoming project that could benefit from riprap, turn to the crushed stone specialists at Hanson Aggregates of the Greater Cincinnati area. Whether you're installing a driveway or building a pond, they offer a wide range of materials to meet your needs, including sand, gravel, and limestone. Learn more about limestone products on their website, and get personalized assistance choosing the right crushed stone for your needs by calling (800) 654-9229. They also offer a handy online calculator for help determining how much material you need.