AN ACR MLG CAPT FOUND HIMSELF HIGH AND FAST.

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WE WERE OPERATING FROM SEATTLE TO OAKLAND FOR ONLY THE SECOND TIME IN OUR LIVES. THE WK BEFORE WE HAD AN UNEVENTFUL FLT AND WE FIGURED THIS ONE TO BE THE SAME. HOWEVER; SOME MISCOMS CAUSED IT TO BE RATHER INTERESTING AND SOMEWHAT FRUSTRATING. THE MISUNDERSTANDING ALL CAME VIA DSCNT CLRNC -- OR LACK OF IT. WE ELECTED TO REMAIN HIGH (FL320) UNTIL THE LAST MIN IN ORDER TO CONSERVE FUEL. WE HAD NO DSCNT GUIDANCE BECAUSE THERE IS NO PUBLISHED ARR TO OAKLAND FROM THE N AND WE DIDN'T RECEIVE ANY SPECIFIC XING RESTR THE WK BEFORE. SO; WE PLANNED TO BE ABEAM OAKLAND AT 6000 FT AND EXECUTED OUR DSCNT ACCORDINGLY. AS WE APCHED SAUSALITO -- ABOUT 25 MI AWAY AND PASSING THROUGH FL200 AT ABOUT 4500 FPM; CTR TURNED US AWAY TO THE W AND ASKED US TO SLOW. WE WERE NEVER TOLD WHY. FINALLY; AFTER A FEW MINS ON A W HDG HEADED OUT TO SEA; WE ASKED WHAT WE NEEDED IN ORDER TO RETURN TOWARDS OUR COURSE. WE WERE TOLD THAT WE NEEDED TO GET DOWN IN ORDER TO CROSS SAUSALITO 10 MI N AT 7000 FT. WE WERE TOLD THAT THIS WAS THE STANDARD XING AND IT WAS USED 'EVERYDAY.' WELL; WE CERTAINLY DIDN'T KNOW IT AND IF WE HAD; WOULD HAVE PLANNED ACCORDINGLY. WHY WEREN'T WE GIVEN THE SPECIFIC CLRNC OR AT LEAST AN 'EXPECT TO CROSS...?' IT'S EASY FOR CTLRS WHO WORK THE SAME SECTOR OR THE SAME ARPT DAY AFTER DAY; TO ASSUME THAT WE PLTS KNOW THEIR LCL PROCS. UNLESS WE FLY THE RTE REGULARLY. WE DON'T! SO; IF IT'S NOT PUBLISHED; PLEASE INFORM US. WE WANT TO COOPERATE IN A SAFE; SMOOTH FLOWING ATC SYS IT'S IN ALL OF OUR INTERESTS!