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Electronic Reference Library (ERL)
The ERL contains the following resources:
Construction Manual
Flagger's Handbook
Materials I.M.s
Specifications
Standard Plans
The Materials I.M.s contain approved material sources, procedures, supplies, and fabricators.
Construction and Materials building

Office of Construction and Materials

Iowa Department of Transportation
800 Lincoln Way
Ames, IA 50010

Phone: 515-239-1352
Fax: 515-239-1845
Email: central.construction@dot.iowa.gov