At Alkali Ridge in southeastern Utah,[7] thirteen sites have been excavated which have yielded valuable information about architectural development. Ten of these contained Developmental-Pueblo structures. In this area, even as early as the eighth century, pueblos with as many as three hundred above-ground storage and living rooms were being built in association with large and small pit houses. These pueblos consisted of long curving rows of contiguous rooms with the larger dwelling units in front of the small chambers used for storage. A variety of wall types was used, often in combination. They include upright stone slabs, jacal, and some coursed masonry. During the latter half of Developmental-Pueblo times in this area there were buildings made of jacal with stones imbedded in the adobe. Those found range in size from one to twelve rooms, and some may have been larger. There were also structures of coursed masonry. Some of these contained only one or two rooms but others may have been fairly large. In excavations near Allantown, in eastern Arizona,[112] the evolution from simple masonry granaries to multi-roomed houses, and the development from simple, partially subterranean houses to highly specialized kivas, or ceremonial buildings, is clearly shown. There the change from domiciliary pit house to unit house seems to have occurred in the period between 814 and about 1014 A. D. This, however, was a slower development than in other areas. In the Chaco Canyon area of New Mexico, for example, great communal houses, with several stories and hundreds of rooms, of which the unit-type house seems to have been the forerunner, apparently were started by 1014. Unit houses, which were commonly built in the second part of Developmental-Pueblo times and in the following period, were above-ground structures built of stone and adobe. They were one story in height and usually contained from six to fourteen rooms. These rooms were sometimes placed in a long row, sometimes in a double tier, and, in other cases, were arranged in the shape of an “L” or rectangular “U”.