The Maine railroads (like many northern lines) had enclosed water tanks. The WW&F used the type from the first days of the W&Q in 1894 - '95. The tanks had a 3,000 to 3,500 gallon capacity and were usually served by an uphill spring that fed water constantly. The tank buildings were heated by coal stoves that the brakeman or ashcat would tend when a water stop was made. Firing the stove was normally done when daytime temps were below 20 degrees. The system worked well and the modern WW&F has used a kerosene heater under the Sheepscot tank for Winter operations a few times.