The construction of a spring box is both complex and costly. However, it may not be necessary at all. This short publication suggests an alternative construction to a conventional spring box.
SKINNER, B. SHAW, R. (n.y): Protecting Springs – An Alternative to Spring Boxes. (= Running Water , 34 ). Leicestershire: Water, Engineering and Development Centre (WEDC), Loughborough University URL [Accessed: 08.03.2019] PDF