Two elm trees in front of Ridgefield Town Hall are slated to be taken down today.  Two species of elm trees are being considered for replacement.  Both kinds of elm are disease and pest resistance.  Bailey Avenue will need to be closed for the work so that a crane can lower the  wood as it's cut.  After the trees are taken down, new sidewalks will be installed.  Drainage work will also be performed.  The overall project is expected to take about two months.