In Animal Crossing: City Folk, donating to the Town Fund can be done by going to the Town Hall and talking to either Pelly or Phyllis at the window for the Civic Center, and selecting Town Fund from the list of options. Donating to the Town Fund achieves a new bridge, fountain, and a windmill or lighthouse. It is similar to the Town Decoration feature from Dōbutsu no Mori e+ and the Public Works Projects of Animal Crossing: New Leaf.
Achieved by donating 200,000 Bells
Once the player has donated 200,000 Bells to the Town Fund, there will be a notice the next day to vote on the location to have the bridge built. There will be a notice on the Notice Board reminding you to vote when it is available. Pelly or Phyllis will ask the player which location you wish for the bridge to be placed using locations circled on the map given to the player by Rover. This is done once the player has clicked 'Town Fund' (Labeled 'My Account' when Phyllis is working) when talking to either one of them in the Civic Center window. Remember, the location voted for may not win the majority of votes, so don't feel discouraged if the bridge is built in an area you don't feel is right. Pelly and Phyllis will mention it is in the process of being built when you talk to them.
The bridge takes a week to build. Once built, Mayor Tortimer will be seen walking around the new bridge. Upon talking to him, he will say:
"Good news, <Player>! Our new bridge is finally finished! And today's the opening ceremony! However, since we spent all our funds on the bridge, we have none left over for a proper celebration. So, we'll just have to use our imaginations and pretend there are balloons and streamers and such. But giddy laughter is free, so please--drink deep from that well! Like so. Heh heh heh HORF HORF!"
Achieved by donating an additional 400,000 Bells (600,000 Bells in total)
Once the player has donated 400,000 Bells to the Town Fund, a fountain will be built. You will be told of the plans the following day when talking to Pelly or Phyllis, so do not expect a response about the donation until the next day. The fountain can be used to get a silver or a golden axe, by chucking a plain axe into the fountain and talking to Serena. There is no vote for the location of the fountain, it is placed just outside the Bus Station on the concreted area. It resembles the fountain found in the City.
Like the bridge, it takes seven days for the building work to be completed. Tortimer will be standing in front of it, and upon talking to him will say such things as;
"You DO know you can't drink the water in the fountain, don't you, sprout?"
"Throw a coin in the fountain, <Player>! We could use the revenue! Heh heh horf!"'
"<Town> sure has seen a lot of improvements since I first became mayor. Never let it be said that Tortimer ignores the little guy!"
Achieved by donating 1,000,000 Bells (1,600,000 Bells in total)
Once donating a further 1,000,000 Bells to the Town Fund, a windmill OR lighthouse will be built, depending on which one wins enough votes by the town people. Either of the two appear by the shoreline, on noticeable peninsulas in the land.
It takes one week to build and will be mentioned on the town bulletin board about the donation. Once built, Tortimer will appear nearby for an opening ceremony, and may say such things as:
"That lighthouse doesn't just light the coast for ships. It also lights up the hearts of the people of <town name>. Or something like that."
"Let's hope it revitalizes our dear <Town Name>!" (lighthouse)
Donations to the Town Fund are non-cumulative. Any Bells donated in excess e.g. a donation of 210,000 Bells which would mean 10,000 Bells extra, will be lost and won't be put forward to the next attraction. Making note of how many Bells you have donated is useful so as to not over donate and waste Bells. This can be done in various ways - by saving Bells to the inventory and then into a wardrobe, or emptying out a bank account and saving the Bells needed using the ABD machine in the City or the Town Hall.