Soil Erosion Plans

My goal is always to be in a position to enable builders and developers to responsibly develop their land. Since our forefathers failed to care about the environment and just looked at the land as a commodity, we now must pay the price of government regulation.

So far its not that bad. The developer (or their engineer) chooses how the development progresses and determines the products used. There is only about 13 things listed in Part 91 that must be on the plan. The real design is up the engineer.

As an Engineer, I realize the need to utilize standard drawings and cookie cutter plans. But that doesn't cut it for soil erosion. At the least, you must consider the soil type and slope.

The plan should show pre-existing conditions, final conditions and detailed instructions on how to go from one to the other. Typical items missing from plans I see are products used and construction details. How do you bid a project if you don't know which Geotextile fabric they want? How about all thoes plans I see with silt fence details showing wire backing?

Heres my suggestion. First, design the site. Its probably already layed out when you get it. Design the roads and balance the dirt. Do all the standard CE work.

Second, go through the list of things in Part 91 and put them on the plan. This includes soil descriptions. Are they erodible? Which way does the land slope? Where is the nearest water? Where are the existing catchbasins?

Third, think about the site. Protect everything identified in the above step. Silt fence does not stop erosion and therefore does not protect the land. If you don't know how to stop erosion, either learn or hire an individual who does. I am sorry if I sound harsh, but if you cant do it learn how. Plan review takes much longer if the enforcing agent needs to train the designer in the process.

Fourth, instruct your draftsman (or do it yourself) to place standard details for ALL the items listed in your "keying system". Then, you must update them to reflect specific item selections. You are the engineer, use your knowledge to make educated decisions.

If you follow this process you will be able to intelegently argue the basis of design for your project instead of arguing about the "requirements" for part 91.

Finaly, visit the site while it is being built to see what your plan was lacking. We can always do better.