This book is a good reference for those who works on erosion and sediment control. Needs more information concerning the type of construction necessary for erosion control, because this book touches this subject faintly. I rate it 4 stars because all other information is covered extensively and clear. My interest in this book was for erosion control, but when I tried to look for the information, I was dissapointed. But comparing this book to other similar references, this is the best you can ever find.