Outdoor Manure Storage Manure was stored outdoors for 55 of the respondents. Of these 55 responses the majority were earthen storage with the remaining being split relatively equal between circular formed and square formed storage and anaerobic lagoons, Figure 8. The cost statistics for each type may be seen in Table 7. Anaerobic lagoons, unlike the other types of storage, is actually a type of treatment rather than being a slurry storage. Because of this the required size is much greater due to required dilution water to make the lagoon work.
Lagoons require seven or eight gallons of dilution per gallon of slurry.
Therefore, the cost per gallon for a lagoon needs to be multiplied by 7 or 8 times to compare lagoon cost directly to other types.