Abstract
The author of this letter comments that the study described by Dennis Williams in “Modern Techniques in Well Design” (Journal AWWA, September 1985) appears to be restricted to a single manufacturer's product. He also questions statements concerning high efficiency wells in uncased rock aquifers, filter packs, specific discharge versus critical well radius, natural development, and trade‐off between length of screen and available drawdown. Kelly concludes by stating that Williams did not appear to draw on previous extensive research on wells. Williams responds by pointing out that the study included six commercially available screens. He states that the comment regarding high efficiency wells was made only as a comparison. Williams comments that the procedure of determining the minimum length of screen only enhances well design criteria by providing a minimum check point on screen length. He remarks that previous research was evaluated for the study, but he believes some of the conclusions did not reflect sound well design criteria.
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