Cleaning Drain Tiles

[Crystal C.]

I have an old Milwaukee house built in 1929. A such, the house was built with the old clay drain tiles and palmer valve system. There is seepage into the basement during seasonal downpours. A drain tile test was done and showed a 50% blockage in two of the tested sites and 75% at the third. The tiles are blocked with clay mud. The basement contractor of course wants to install interior drain tiles and a sump pump to the tune of $9,000.

I'm trying to get a gauge of who may have addressed the issue by getting the drain tiles cleaned out? Is it reasonable to expect a cleaning to open up mud clay from tiles this old? If so, any suggestions on how to safely DIY this cleaning?