There are very few natural lakes or ponds in Maryland and the United States for that matter. Our lakes were created by damming up streams that flowed through marsh areas. The dam pictured below at one end of Lake Elkhorn it what created the lake.
When we pave over land to build parking lots and drive ways a storm drain system has to be built to channel the rain water away from these lots.
Ned pointed out in the picture below how one storm drain dumped water into a small stream that leads down to Lake Elkhorn. Unfortunately the stream is too small to handle the amount of water dumped into it and the soil is eroded into the lake.
Below is the small delta that is being created in the lake from the soil flowing into the lake from the stream.
Ned's knowledge of geology was useful in explaining the rock formations that are at one end of the lake. The large rocks pictured behind him are mostly sedimentary rocks made from compressed sand that washed away from the mountains that once were located where we live. They were higher than today's Himalayas. The soil erosion from these mountains ended up flowing east and creating the Eastern Shore and the Continental Shelf off the Atlantic Coast.
Below is a vein of granite squeezed between two layers of sedimentary rock.
It is not hard to see examples of the granite like pictured below as you go around the lake.
The area around the BG&E power lines at one end of the lake creating a healthy marsh land for ecological and wildlife benefit shows how development doesn't have to be negative.
Berries on the bushes below are an important aspect of any wildlife habitat.
As mentioned earlier CA can only manage a part of the problem with soil erosion and storm runoff. We as homeowners can often do damaging things that increase the problems. The owners of the home below have cleared trees and our shrubs that will increase the amount of storm water runoff that is only a few feet from the lake.
Here is the link to the CA rain garden cost share program. John McCoy explains the program in this You Tube video. Time to do our part as homeowners.