Most people are not aware that Mt. Tabor Park hosts at least one closed water tank in addition to the large open reservoirs you readily see. This tank features the covered reservoir “technology” the Feds insist is safer for public health. The Feds are not able to site even one scientific study that draws such a conclusion, rather they assert anecdotally that the intrusion problems they've documented for covered tanks should be worse for open storage tanks. The anecdotal evidence, along with mounting scientific research, actually suggests the risks are at worst equal.
On May 27, 2012, (that is just 2 months ago) someone broke into the buried tank at Mt. Tabor and dumped in a host of junk including a sealed bottle of Hydrochloric Acid. You never heard about this did you? Well, this is a closed tank and reporting this incident would not bolster support for a massive new expenditure, so Water Bureau didn’t report it to the media. (Heck, they didn't even report it to the State's drinking water monitoring program for like a month. Which is, I'm pretty sure, a violation of the 24 hour rule.) After all, a covered storage tank can’t be seen as fallible, even if that would be the most realistic opinion to take. Reservoir 7 was drained, cleaned, and brought back online without a word to the media just as is common practice with detects and intrusions.
Remember those bright and shiny new buried tanks we’re spending millions and millions to build at Powell Butte, because they supposedly represent the “better” technology over the reservoirs we already own at Tabor? I wonder how impervious those have actually been. Oh, yes, with a look at drinking water reports at Oregon Health Authority you can see that their track record is about on par with any other part of the water system = detects happen, and they don’t get reported unless you are trying to convince the public of something else.