This technical report presents an overview of a reading assessment used by a large school district in the Pacific Northwest. It provides sufficient background information to enable those unfamiliar with the assessment to understand the various subtests that comprise it as well as its development and application in the district for making screening, grouping, and evaluation decisions. Compiled performance data from the spring 2004 assessment cycle is presented for all students in the school district in kindergarten through eighth grade for all subtests and for the sample of ninth grade students who were involved in the piloting of the grade nine measures. The technical adequacy of the assessment is explored using both descriptive statistics and item response theory. Suggestions for improvements to the various subtests are discussed. (Contains 45 tables and 1 figure.)