TBM 700/TBM 850
Air Traffic Control Fully Certified
Workload
ATC Issue All Types
Air Traffic Control Issued New Clearance
Procedure
S56 refused to allow the aircraft into their airspace IFR without a 15 minute delay. The TBM was flight planned to land U42. Pilot asked for descent to MIA to cancel IFR. I descended aircraft to 130. After querying the pilot of the weather; I determined he would not be able to cancel IFR or stay out of S56 airspace on his assigned route. I assigned heading 245 after YMONT Intersection and lost aircraft on RADAR just after aircraft left YMONT. Only legal clearance at this time was direct FFU; the only NAVAID within use limitations. Direct FFU would however take the aircraft into S56 airspace. I left aircraft on 245 heading; not knowing if heading would clear terrain. I climbed the aircraft to 140. Aircraft was on RADAR vectors and possibly headed into a 141 MIA area for about 3 minutes. Couldn't turn aircraft for terrain and S56 airspace and couldn't climb him above 140 for 150 traffic. I think S56 needs to proceduralize SLC arrivals so they can accommodate U42 traffic.
ZLC Controller described a possible below MIA event when S56 imposed a 15 minute airspace entry delay; the reporter suggesting S56 proceduralize routing procedures to U42 to avoid this type of event.