SMT PLT DSNDS LOWER THAN ASSIGNED WHEN CLRED FOR APCH. CLRNC INTERP.

Narrative

I WAS ON AN IFR FLT FROM PIERRE; SD; TO HAYDEN; CO; ON FEB/SAT/94. ON DEPARTING PIERRE IN A 340 CESSNA; I CLBED TO 16000 FT AND WAS ON TOP OR BTWN CLOUD LAYERS. AT APPROX LARAMIE; WY; I LEFT ZDV AND CONTACTED FLT WATCH FOR A WX UPDATE. THEY INFORMED ME THAT THE HAYDEN AREA WAS RPTING CEILINGS OF 500-1000 FT AND LIGHT SNOW. BTWN LARAMIE; WY; AND HAYDEN; CO; ZDV CLRED ME TO 14000 FT. AT THAT TIME ZDV ASKED ME IF I WANTED A VFR OR IFR APCH TO HAYDEN. AT THAT TIME; I ASSUMED THE WX HAD IMPROVED AND TOLD CTR I WOULD TAKE VFR BUT AT THAT TIME I WAS STILL IN IMC CONDITIONS. AT APPROX 10 DME FROM HAYDEN VOR I ASKED ZDV FOR A LOWER AND WAS ADVISED THAT AT MY POS THEY COULD NOT GIVE ME LOWER. I MAINTAINED HDG AND APPROX 2.5 MI PAST THE VOR; CTR CLRED ME FROM VOR TO HAYDEN ARPT VIA ILS 10. I CIRCLED AND INTERCEPTED THE LOC AND STARTED TO DSND. IN BEGINNING THE DSCNT I SWITCHED DME TO ILS FREQ AND DETERMINED THAT FROM MY ALT; IN A PISTON ACFT; I WOULD NOT BE ABLE TO DSND QUICKLY ENOUGH TO INTERCEPT THE GS AND COMPLETE THE APCH. AT THIS TIME I DECLARED A MISSED APCH AND BEGAN TO CIRCLE BACK TO THE VOR. ON DECLARING MISSED APCH CTR ASKED ME MY ALT; I RESPONDED AT 13700 FT. CTR THEN INFORMED ME I WAS NOT CLRED AT THAT ALT. THERE WAS ANOTHER ACFT IN THE AREA OF WHICH I HAD VISUAL CONTACT. I WAS THEN INSTRUCTED TO CLB AND MAINTAIN 14000 FT; GO TO THE VOR AND HOLD. WHILE HOLDING; THE OTHER ACFT FLEW THE ILS 10 APCH; DSNDED AND LANDED. WE WERE THEN CLRED AGAIN FOR THE ILS 10 APCH; DSNDED AND OBTAINED VISUAL CONTACT OF THE ARPT; LANDED AND CANCELED WITH ZDV. I CALLED ZDV ON THE GND; AS INSTRUCTED; AND WAS INFORMED THAT THEY WERE REVIEWING THE TAPES TO DETERMINE IF I WAS IN POSSIBLE VIOLATION FOR ALTDEV. AT THIS TIME I AM UNSURE IF ZDV IS GOING TO FILE A VIOLATION. I FEEL PART OF THE CONTRIBUTING FACTOR FOR THIS PROB WAS ZDV'S NOT ALLOWING ME TO DSND PRIOR TO ARRIVING AT THE VOR (THE NOS APCH PLATE INDICATES 13200 FT TO 11900 FT AS MINIMUM ALT FOR MY POS INSIDE THE 10 DME CIRCLE) AND THEIR IMPLYING THAT I SHOULD HURRY MY APCH BECAUSE OF OTHER TFC. IN RETROSPECT I SHOULD HAVE; AND WILL IN THE FUTURE; ADVISE CTR IMMEDIATELY WHEN GIVEN A CLRNC THAT I DON'T FEEL I AM ABLE TO COMPLY WITH; RATHER THAN TRYING TO COMPLY SO AS TO EASE CTR'S WORKLOAD. I WOULD LIKE TO CONCLUDE BY STATING IN MY 19 PLUS YRS OF FLYING; THAT I HAVE A SPOTLESS RECORD OF NO VIOLATIONS; ACCIDENTS; OR INCIDENTS.