What defines an “approved source” according to IDOT regulations?

An “approved source” according to IDOT regulations is defined as a source that has been evaluated and deemed satisfactory. This evaluation process typically involves a thorough assessment of the aggregate's quality and performance characteristics to ensure it meets specific standards set by the Illinois Department of Transportation. It ensures that the materials used in construction projects maintain the required durability, strength, and safety, contributing to the overall integrity of the infrastructure.

Sources that are not approved may not meet quality standards, which can lead to issues such as material failure or sub-par construction practices. The evaluation process may include laboratory testing, assessments of the source's operational practices, and previous performance records. This systematic approach ensures that only reliable and high-quality aggregate materials are used in state projects.

While the availability of a source, pricing considerations, or the type of materials offered may be important factors in sourcing, they do not directly define an "approved source" under IDOT regulations. The focus is primarily on the quality and the formal certification process that recognizes a supplier's ability to consistently deliver materials that adhere to regulatory standards.