frequency). The arrival of Type II LRVs began to allow 3-car trains at high frequencies in 2013. Maintenance facilities The Blue Line's Operations and Maintenance Facility (OMF) is located between the Cedar-Riverside and Franklin Avenue stations. The facility was expanded in 2011–2012 to make room for the 12 additional type II LRVs and a Light Rail Support Facility to allow some maintenance not requiring direct access to vehicle chassis to be moved out of the OMF building. The Green Line's Operations and Maintenance Facility is located on the site of the former Diamond Products building in Saint Paul's Lowertown neighborhood, just east of the Union Depot station. Commuter rail The Twin Cities region currently has one heavy-rail commuter line, the Northstar Line. Though others are planned, none has advanced beyond alternatives analysis at this time. Locomotives The Northstar commuter rail line's first five locomotives are the MP36PH-3C, manufactured by MotivePower in Boise, Idaho at a total cost of $13,823,000. The first of the locomotives, #501, was delivered October 3, 2008. The other four arrived around New Years Day of 2009. The locomotives are numbered sequentially 501 through 505. Around the time the line began service in November 2009, it was announced that a negotiations were underway with the Utah Transit Authority to acquire a sixth locomotive from their FrontRunner service. This locomotive arrived in December 2009. By June, Metro Transit decided to purchase the UTA locomotive due to high leasing costs and the need to have an extra locomotive for when others are being repaired or inspected. $2.85 million for buying the locomotive and repainting it in Northstar livery came from a $10.1 million contingency fund built into the original cost of the service. Passenger coaches Northstar uses the Bombardier Bi-Level Coach, a number of which are configured as cab cars. With no straightforward way to turn the trains or locomotives around at the ends of the line, the train is simply run in reverse from Big Lake to Minneapolis. The engineer remotely controls the locomotive from the cab car in the last coach of the train. Official documents state that the line uses seventeen Bombardier BiLevel Coach passenger vehicles, although an 18th coach (#712) has apparently been photographed. Consists Five trains are used during a typical day's operations, each consisting of a single locomotive, two or three regular coaches and a cab car coach. The extra locomotive and coach