A recent publication in the Moscow-Pullman Daily News has some residents ready to pump some "Palouse Maple Syrup". The article mentions a recent co-op started by Greg Hodapp that talks about how anyone can pull sap from a maple tree.
The article has the city of Moscow sending out a news release reminding citizens that all trees located within the street right-of-ways are off-limits.
The City of Moscow is reminding citizens that all trees, including maple trees, located within the street right-of ways are subject to City laws and protections [ord. 8-5 Sec 8-6(1&3)]. At this time, the City is not granting permission for the tapping of these trees.
According to the article, which is only accessible to paper subscribers, the sap tapping does not harm the trees, but the city says it can affect older and stressed trees. Trees on private property can only be tapped by owner's permission.