Colorado River dam (officially Hoover), 7 letters
Obstruction at the entrance to a cave, maybe, 7 letters
Rock that may be hard to roll, 7 letters
A large smooth mass of rock detached from its place of origin, 7 letters
A town in north central Colorado, 7 letters
Rocky Mountains resort center and university town, 7 letters
Colorado municipality, 11 letters
Hoover Dam location, 11 letters
City at the foot of the Flatiron Range, 15 letters
City northwest of Denver, 15 letters
Home of Celestial Seasonings, 15 letters
Home of the Buffalos, 15 letters
Hometown for a geologist?, 15 letters
Mork & Mindy city, 15 letters
Mork and Mindy venue, 15 letters
Rocky Mountains city, 15 letters
Western university town, 15 letters
Colorado River barrier, 10 letters
Colorado River construction, briefly, 10 letters
Colorado River site, 10 letters
Former name of a Colorado River barrier, 10 letters
Hoover's former name?, 10 letters
It was renamed for Herbert Hoover, 10 letters
It was renamed for Herbert Hoover in 1947, 10 letters
It was renamed for Hoover in 1947, 10 letters
Its construction created Lake Mead, 10 letters
Lake Mead holder, originally, 10 letters
Part of the Arizona/Nevada border, 10 letters
Project for giant beavers?, 10 letters
Result of a rockfall?, 13 letters
Peeress from Colorado?, 11 letters
Certain Colorado headgear?, 10 letters
Wisconsin vacation spot, 15 letters
Ancient Greece's legislative assembly, 5 letters
Ball game, in Blois, 5 letters
Ball in the game of p, 5 letters
Ball used in a lawn bowling variant, 5 letters
Greek legislative assembly, 5 letters
Greek legislative house, 5 letters
Modern Greece's legislative assembly, 5 letters
Pear-shaped synthetic gem, 5 letters
Synthetic alumina-based gem, 5 letters
An inlaid furniture decoration, 5 letters
Tortoiseshell and yellow and white metal form scrolls in cabinetwork, 5 letters
Italy : bocce :: France : ___, 6 letters
Metal balls used in p, 6 letters
'70s New York Philharmonic leader Pierre, 6 letters
Venue for promoting avant-garde music?, 12 letters
Bridge Over the River Kwai writer, 6 letters
French cabinetmaker/architect Andr, 6 letters
Planet of the Apes author Pierre ___, 6 letters
An inlaid furniture decoration, 6 letters
Tortoiseshell and yellow and white metal form scrolls in cabinetwork, 6 letters