Within the last 20-30 minutes Rocky Mountain Airport activated a "Code Orange". (Primary Comms are on the DTR Rocky Mountain Airport Emergency Channel, TGID 1519). Evidently a Cessna Citation aircraft is having mechanical problems, they have 2 souls on board with 5000 Lbs of fuel. The aircraft is dumping most of it's fuel before landing, which is expected to take about 1 hour. Due to delay, all North Metro Fire & Medic units went back into service, they will be re-toned prior to landing attempt.