An Armed Services Board of Contract Appeals dispute, Appeal of L.S. Black-Loeffel Civil Constructors JV, ASBCA No. 62402, 2023 WL 5827241 (ASBCA 2023), involved which party bore liability for delay—the federal government or the prime contractor–based on various legal theories. Without detailing the factual details, a number of interesting legal issues were raised in this dispute including (1) a defective specification challenge, (2) excusable delay, (3) Type I differing site condition, and (4) superior knowledge. These legal issues are discussed below.

1. Specification Challenge (Defective Specifications)
The contractor claimed that the government’s specifications were defective in regard to a thermal control plan. The government countered that the specifications were not design specifications but performance specifications. The specifications were performance based because they did not tell the contractor how to achieve the performance-based criteria.