text: One advantage to hypolimnetic withdrawal is that it is relatively inexpensive to install an Olszewski tube or any similar device. Along with low initial cost, it also has a relatively low annual maintenance cost. The following are four systems installed in the United States (2002), their area in hectares, the rate of flow in cube-meters per minute, and their initial installation costs in US dollars:
  * Lake Ballinger
  41 ha<br />
  3.4 m/min<br />
  * Lake Waramaug
  287 ha<br />
  6.3 m/min<br />
  * Devil's Lake
  151 ha<br />
  9.1 m/min<br />
  * Pine Lake
  412 ha<br />
  5.3 m/min<br />