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Specifications

Frequently Asked Questions

As of the October 2023 release, the ERL is the governing source for the Standard Specifications and related manuals.

Questions and answers about ERL. Also see our FAQs for obtaining Standard Specification book and more. Visit FAQ

ERL Archive

Find past issues of the Electronic Reference Library General Supplemental Specifications.

Specification Committee

Consists of office directors or their designees. More

Electronic Reference Library

Current ERL
Legacy Archive
Pre 2023

Standard Specifications

As of 2023 the Standard Specifications are accessed primarily through the Electronic Reference Library (ERL).The ERL governs if there are discrepancies.

Note: Due to printing limitations, the 2023 Standard Spec Book is printed in two volumes.

  • Request ERL CD (No longer distributed)
  • General Supplemental Specification (No longer distributed)

Contact Us

Phone: 515-239-1742
Fax: 515-817-6507

Address: 800 Lincoln Way, Ames, IA 50010

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E-mail: DOT.Specifications@iowadot.us

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