Standard Dry Well Sizes

How to determine the correct size of a dry well.

Standard dry well sizes.

Essentially a dry well takes the water coming off of your home when it rains and drains it away from your home to a tank and gravel pit that is designed to handle large amounts of water. Look at the site constraints if any and. You have to factor in the percolation of the soil how well it percolates. 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.

Figure 3 shows a sketch of a typical single family. 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. New jersey stormwater best management practices manual chapter 9 3. Sizes and stats of our drain storm and solid rings.

The stormwater volume is 33ft3. A dry well is a buried tank or a rock filled excavation used to capture storm drainage and drain storm water runoff to groundwater. A dry well is an excellent way to divert water runoff from your roof away from your home and yard. 33ft3 3ft 11ft2.

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. How to size a dry well. Measure the available length or width of your dry well to determine shape and configuration. If local ordinances do not regulate the size and number of dry wells it s standard practice to install one for each downspout.

Flo well engineered dry well can be used independently or as part of a larger system to collect and detain stormwater allowing for groundwater recharge. B look for any limitations on size or dimensions posed by the desired dry well location. Environmental protection agency in the code of federal regulations at 40. Volume weight and other important information based on diamater and height of our products.

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. Additional dry wells may be necessary if elements of your. 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. Should be used in the calculations to size the dry well.

As a standard rule of thumb we use for rainwater harvesting for every sf of roof plus land in this case inch of rain one will get 623 gallons of water so a 2 rainstorm will give you over 3000 gallons of water that needs to go somewhere granted most is not heading directly to the problem area.