The MW&W is a garden railroad, begun in the summer of 2009, representing the narrow gauge railroads of Colorado, primarily the Denver and Rio Grande Western in the first half of the 20th century. The track and structures remain in place year-round but the rolling stock is kept inside except when being operated. Although history has been used to guide the development of the railroad, compromises have been made to stay within budget, thus giving "Rivet Counters" much fodder. Like the prototype, it was built quickly. Improvements are continuously being made. Early in 2012 the entire Willoughby depot area was rebuilt on a stronger deck. Improvements completed in 2012 include: the main line trestles between Willoughby and Avogadro Creek, upper loop trestles, the main line trestles west of the flat bridge, new decks at South Willoughby and West Junction, all other roadbed, were also completed 2012. More recent improvements include an expansion of the lower loop and a house track at the Willoughby Depot.