Joe G

I must have a rather large watershed area upstream of my pond area.

The pond area encompasses an existing intermittant stream that enters my property and then exits. This stream exits my property via a 2' culvert under my driveway. During periods of Spring run off and heavy down pours I have witnessed this culvert fill to 3/4. One two occasions I have witnessed this culvert completely underwater discharging a tremendous amount of water. At first I felt I needed a larger size culvert but my County Soil & Water Conservation Agent felt that a drop tube for same size would handle more water than a horizontal tube. The downriser would have the overflow water dropping, charging the tube with more pressure and increasing the velocity. Therefore a full tube under greater velocity would equal more water than a static pressure horizontal tube.

The stream under normal season dries up towards the end of summer. The last 2 years have been very wet in upstate NY and the stream has not stopped flowing. I would estimate that the stream starts about a mile upstream from the pond site and picks up water the entire route via springs when run-off isnt being added. During the excavation additional springs were disturbed in the pond site which only add to the volume of water.