Transmission lines carrying massive amounts of wind-generated electricity from Wyoming will cross Colorado like 8 and 12-lane interstate highways with no exits or on-ramps. Why is that?

Transmission lines carrying massive amounts of wind-generated electricity from Wyoming will cross Colorado like 8 and 12-lane interstate highways with no exits or on-ramps. Why is that?
A pumped-storage hydro project in Wyoming reservoir hopes to get married at the substation with a giant wind project. Are there implications for Colorado?