Fig. 20. Difference between maximum and minimum disturbance zone effects, calculated for each scenario. Much of the Lower Blue Planning Basin is composed of areas with lower effect difference between scenarios, so that the density and pattern of development make relatively little difference in the impact on Critical Habitat. Areas with higher effect range (e.g., 50&*8211;100%) are high “leverage points,” where the choice of development scenario may strongly influence future effects of development on Critical Habitat. The map shows distance from locations of Critical Habitat to the nearest urban location for the 1999 development pattern. Near distances (in orange) depict locations that are relatively close to urban areas.