CLRNC LNDG NOT RECEIVED. UNAUTH LNDG.

Narrative

AT APPROX 15 MI OUT; WE WERE CLRED FOR A VISUAL TO RWY 35L/DEN AND TOLD TO CONTACT TWR AT THE FAF. APPROX AT THE FAF; THE CAPT CALLED FOR GEAR; FLAPS; AND CHKLISTS. WE WERE ALSO LOOKING FOR TFC AND MAINTAINING SEPARATION FROM TFC AHEAD. WE WERE WORKLOAD SATURATED AND LANDED WITHOUT A CLRNC. AFTER LNDG WE SWITCHED TO TWR AND THEY SAID SWITCH TO GND. NOTHING WAS SAID ABOUT LNDG WITHOUT A CLRNC. AS USUAL; THERE ARE SEVERAL CAUSES THAT LED UP TO THIS OMISSION. I BELIEVE ONE OF THE CAUSES WAS BEING TOLD TO SWITCH TO TWR AT A POINT LATER IN THE APCH. I THINK THE CTLR SHOULD ONLY GIVE A CLRNC TO 'CONTACT TWR NOW;' NOT TO CONTACT TWR 10 MI DOWN THE ROAD. I ALSO THINK THAT UNFAMILIARITY WITH TWR FREQ AT THE NEW DEN ARPT (AND THE FACT THAT THE FREQ IN USE IS NOT ALWAYS THE FREQ ON APCH CHART) ADDED TO THE PROB. AND OF COURSE; THE OTHER PROB BEING THE CONFIGN CHANGES AT THE FAF AND THE ASSOCIATED WORKLOAD. WE HAD GOOD CONTACT AND SEPARATION FROM OUR PRECEDING TFC AND WERE IN NO CONFLICT WITH ANY TFC.