Dry Well Size Calculator

Harris precast supplies new york city and long island with dry wells detention systems manholes catch basins trench drains and other related storm water products.

Dry well size calculator. If no soil permeability data is available assume a conservative value of 0 5 inches hr. How to determine the correct size of a dry well. This is a means of stormwater management that works well for relatively small volumes of storm water runoff in a location where the groundwater table is low enough so that the bottom of the dry well can remain at least 2 feet above the groundwater table. Environmental protection agency in the code of federal regulations at 40.

The dry well is essentially a box filled with gravel and you need to find the height length and width of the box to store the runoff. How to size a dry well. New jersey stormwater best management practices manual chapter 9 3. If soil permeability data is available that measured value should be used in the calculations to size the dry well.

Volume weight and other important information based on diamater and height of our products. How to calculate drywell size needed. If you have slow percolating soil you re going to get a bigger dry well so that it acts as a reservoir when you collect the water and then it could take days for it to percolate into the subsoils. Standard for dry wells february 2004 page 9 3 2 areas where hazardous materials are expected to be present in greater than reportable quantities as defined by the u s.

Depending on the average amount of storm water you need to control you can choose install a dry well that s as small as a couple feet in depth and diameter or as large as several feet wide and. Most places that would still require a permit since it s changing the surface water runoff pattern and i don t think the neighbor will like it. Scalable and flexible commercial solutions for office buildings banks grocery stores and more. A dry well is a buried tank or a rock filled excavation used to capture storm drainage and drain storm water runoff to groundwater.