* Cost: Rip-rap can be a relatively expensive material to install, especially when compared to other options such as concrete or asphalt.
* Environmental impact: Rip-rap can alter the natural flow of water in streams and rivers, which can damage ecosystems. It can also provide habitat for invasive species.
* Visual impact: Rip-rap can have a negative visual impact on an area, especially if it is not properly designed.
* Maintenance: Rip-rap can require regular maintenance, such as removing debris and repairing damage caused by storms.
* Durability: Rip-rap can be durable, but it can be damaged by storms or other natural events.
Overall, rip-rap can be a useful material for erosion control, but it is important to consider the potential disadvantages before making a decision about whether or not to use it.