Figure 1 Ventilation systems for finishing. Figure 2 shows cooling methods. Drip refers to drippers, spray to cyclic spraying and tunnel to tunnel ventilation. Sprayer systems appear to be the most popular put nearly as many use no cooling system at all. Figure 3 shows the manure systems that were chosen by survey respondents.
Deep pits appear to be the most popular.
This trend, while not the best from an air quality standpoint, has been the best mode of avoiding state permit requirements and has therefore made a resurgence. In addition to compiling the average costs across the entire survey, averages were done by type of manure handling method and by the year of construction. The average by type of manure handling system, Table 2, shows that deep pit buildings are more expensive than other types. This relates to the fact that other systems have outdoor storage which is an additional cost and not always factored into the price of the building. The trend by year is in Table 3 and may indicate market demands, competition for projects or building technique advancements.