Those yards are huge, it makes me wonder if they have OSSFs but I doubt they would as there is a community-park there. If they do have an OSSF & it is less than 2% slope then it does require a "Comprehensive Drainage Plan" to max out the oxygen in the soil for water-treatment in the sewage-disposal-area. I'd want to know the lowest elevation of the ditch you're discharging into & the lowest elevation of the surface-water-pond, usually it is 0.2% slope minimum where I haven't found a permitted-residential property yet that had less slope. Then I'd suggest 8 inch pipe or larger depending on how much soil there was above that ground-water-table (being the line drawn from the bottom of the lowest-ditch to the lowest wet spot you don't want to fill. The berm may work but it might also send that water subsurface as the hight of the ponding increases as you'd need to lower the K-sat(a measurement of how much water moves through the soil-materials) rating to control the water passing through your berm. I also would suggest they use a vertical-inlet instead of a grate b/c it will allow large materials to enter & pass through the large-pipe, where leaf martial & grass clippings would never clog the intake as they would wash through b/c of the 3FPS water moving though the properly sized pipe for self-cleaning capabilities.
Please post a follow-up of this site with this design in action.
Thanks
Those yards are huge, it makes me wonder if they have OSSFs but I doubt they would as there is a community-park there. If they do have an OSSF & it is less than 2% slope then it does require a "Comprehensive Drainage Plan" to max out the oxygen in the soil for water-treatment in the sewage-disposal-area.
I'd want to know the lowest elevation of the ditch you're discharging into & the lowest elevation of the surface-water-pond, usually it is 0.2% slope minimum where I haven't found a permitted-residential property yet that had less slope. Then I'd suggest 8 inch pipe or larger depending on how much soil there was above that ground-water-table (being the line drawn from the bottom of the lowest-ditch to the lowest wet spot you don't want to fill. The berm may work but it might also send that water subsurface as the hight of the ponding increases as you'd need to lower the K-sat(a measurement of how much water moves through the soil-materials) rating to control the water passing through your berm.
I also would suggest they use a vertical-inlet instead of a grate b/c it will allow large materials to enter & pass through the large-pipe, where leaf martial & grass clippings would never clog the intake as they would wash through b/c of the 3FPS water moving though the properly sized pipe for self-cleaning capabilities.