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TxDOT's environmental review process is explained in its Environmental Guide, which consists of two volumes:

Date Title Description Format
Environmental Guide: Volume 1 Process Explains how to use TxDOT’s Environmental Compliance Oversight System (ECOS) to environmentally approve transportation projects
Environmental Guide: Volume 2 Activity Instructions Contains individual instructions for completing each of the Activities, Reviews, and Coordinations generated in ECOS that may be required to environmentally approve a given transportation project


In addition, the individual toolkits listed below contain forms, templates, and technical guidance that may be needed to complete activities generated in the Environmental Compliance Oversight System (ECOS).

We welcome feedback to help improve the toolkits. Email us with comments.