Here is my draft message, feel free to reuse:
Dear Mayor and City Council – I am contacting you to express my support for a 50 meter pool at Chinquapin. The current facilities are inadequate: the facility is simply too small for the citizen’s needs, from children learning the basic life skill of swimming, to adult aqua aerobics programs, to aqua-jogging, to masters swimming, to scuba diving lessons, to programs for the disabled, and more. As you can see, the entire Alexandria community will benefit from a new 50 meter pool facility. I am counting on your support to make this happen.