Earthen manure storages (EMS) offer an economically viable means of storing manure as compared to concrete or steel tanks. However, ground water contamination is a concern if the EMS is not constructed properly. Research from Quebec suggests that liquid manure can cause clogging and a great reduction in seepage rates. To confirm these findings, a similar study was conducted. Findings showed that liquid hog manure does effectively clog soil pores, as flow rate was decreased 100 to 1000 times with little effect by texture. Clogging can be easily disturbed and appears to be a surface effect. Warmer temperatures and biological activity might also disrupt this clogging effect. Therefore, the presence of clogging should not be used as a substitute for properly chosen and well engineered earthen materials in manure storages.