CRFD does not deploy suppression apparatus with four firefighters at all times. Suppression apparatus not staffed with a minimum of four firefighters do not meet the company staffing objectives outlined in NFPA 1500, Standard on Fire Department Occupational Safety and Health Program and NFPA 1710.

If suppression apparatus are not staffed with four, CRFD firefighters from the first engine on scene must rely on supplemental personnel arriving later, with the second unit, before making entry into environments that are immediately dangerous to life and health (IDLH), such as structure fires.

CRFD cannot rely on the arrival of a second unit at the scene within four minutes on 63.1% of Castle Rock roads.

CRFD can respond with four firefighters on 36.9% of roads within four minutes, assuming all units are available immediately upon dispatch. Pursuant to implementing staffing and deployment recommendations, the department would likely be able to assemble a minimum of four firefighters within four minutes of travel on 53.6% of roads, which equates to a 354.6% increase in response coverage.

CRFD is able to provide for the arrival of 17 firefighters on 1.0% roads within eight minutes at current typical staffing levels. Pursuant to implementing staffing and deployment recommendations, the department would likely be able to assemble 17 firefighters within eight minutes of travel on 38.8% of roads, which equates to a 3,650.2% increase in response coverage. The arrival of 17 firefighters within eight minutes is the standard for safe, effective, and efficient operations at a typical, residential structure fire.

CRFD is not able to provide for the arrival of 28 firefighters on any roads within eight minutes at typical staffing levels, assuming all units are available immediately upon dispatch. Pursuant to implementing staffing and deployment recommendations, CRFD will increase its maximum firefighters available from 22 to 33, but the department would only likely be able to assemble 28 firefighters within eight minutes of travel on 0.1% of roads. The arrival of 28 firefighters within eight minutes is the standard for safe, effective, and efficient operations at a typical garden-style apartment building or open-air strip shopping center structure fire.

CRFD is not able to provide for the arrival of 43 firefighters on any roads within 10 minutes, 10 seconds at typical staffing levels. The arrival of 43 firefighters within 10 minutes, 10 seconds is considered to be the standard for safe, effective, and efficient operations at a fire occurring at a high-hazard occupancy.

From 2016 to 2021, CRFD units responded to 33,650 incidents and performed 66,780 responses. During that period, incident and response volume grew by 11% and 9%, respectively.

Overall, the busiest first-due district was 151. Quint 151 was the suppression unit with the highest call volume and Medic 154 had the highest call volume among medic units. 27% of Medic 154's responses were into District 155, which does not have its own medic.

CRFD’s 90^th percentile travel time for the first-arriving engine at a fire suppression incident exceeded NFPA 1710 travel time objectives each year from 2016 to 2021. Overall, CRFD did not meet the four-minute standard for 55% of fires.

CRFD’s 90^th percentile travel time for the first-arriving unit at an emergency medical incident exceeded NFPA 1710 travel time objectives each of the six years. Overall, CRFD did not meet the four-minute standard for 43% of emergency medical incidents.