YES it does and all the clean water is sent out to the Wasteland by the Brotherhood of Steel. But only if, in the process of Project Purity you sacrifice either yourself or Sarah, from the Brotherhood of Steel to go into the purifier and enter the code 216 into the machine to stop it from exploding. Which then sends the clean water out into the Wasteland but in turn kills whoever is inside, from high levels of radiation. But if the code 216 is not entered in time the purifier blows up from high pressure and the clean water is not released and everyone near the purifier is killed by the explosion including yourself. Which in turn means that Project Purity FAILS! SO.... all together Project Purity can either fail or succeed depending on how you decide to play the game.
To start up "project purity"--- To cleanse all the water---
It is a quest added after finding dad or Docter Li.
if you are sent there by doctor li before you find your dad find the holotapes in the main part of project purity but if you are there after you find your dad clear the whole place of mutants
Your Dad kills himself taking down an Enclave officer, stopping the officer from getting valuable information about Project Purity
There is noone named 'Adison' in Fallout 3; there is someone named Madision; if that is what you meant. If it is; then Madison is Dr. Li; one of the scientists which your father worked with on project purity. She can be found in the science lab in Rivet City.
yes
SPOILER WARNING:In Fallout 3, yes, your father does die. He is confronted by the Enclave at Project Purity and they are going to take control of it. To stop them, your father releases a lethal amout of radiation into the area, killing the Eclave soldiers in there, but also sacrificing himself in the process.
No
Check entrance of Vault 101. If not there he's bugged out (permanately). Look in the Fallout 3 wiki (related links) for the project purity quest, it might be listed as a bug. Edit: Nevermind, wikianswers won't let me add it as a related link. Google 'fallout wiki'.
After the water drains out of the chamber, you see the statue of Thomas Jefferson,who is the person the memorial is built for because of his famous role in shaping our country.
project nevada
If you are talking about the "Trouble on the Homefront" quest its after you complete Project purity. Travel to a relative distance from 101, Megaton for instance, and you will hear the Vault 101 distress signal on you Radio, listen to it and you will then know what to do. Good luck.