Approved Products (Maple)

MAPLE contains a searchable database of most of the approved products, sources, producers, and suppliers of materials for Iowa highway projects. MAPLE may be searched by the brand/product name, producer, Materials Instructional Memorandum (IM) number, or material name. 

ERL - Electronic Reference Library

Electronic Reference Library (ERL)

The ERL contains the Construction Manual, Flagger's Handbook, Materials IMs, Specifications, Standard Plans, and other manuals and standards.

Access the current ERL