RORY: Hey Luke, someone put a sign for the rummage sale up in your window over there …
LUKE: Your mom asked me to put it there, okay?
RORY: And you said yes?
LUKE: She’s not real good with “no”.
From the sign in the window of Luke’s Diner, we learn that the charity rummage sale is to raise funds to restore the Old Muddy River Bridge. There is an artist’s impression of the bridge, although it’s unclear whether this is what the bridge used to look like and needs to be restored to this condition, or this is what the new bridge will look like once it’s rebuilt. Either way, it looks as if the whole thing could be knocked up in a single afternoon with less than $100 worth of lumber and Luke donating his time to it.
However, for some reason this simple wooden footbridge is an ongoing project for the town, which spends much of its time raising money towards the bridge’s reconstruction and maintenance throughout the show’s original run. We can see that once again Luke is more civic-minded than he pretends to be, as he helps advertise the rummage sale, just as he brought hot drinks the Stars Hollow Battle re-enactors.
Also notice that Lorelai doesn’t even need to add her address: everyone in town knows where she lives, and she can just tell them to take contributions to her house. That’s some level of notoriety in a town of nearly 10 000 people.
In real life, the small town of Washington Depot, which Stars Hollow was originally inspired by, is surrounded by state parks and reservations. There are several wooden footbridges over rivers, creeks, and gorges; some quite elaborate, and others small and simple like the one in the drawing.