Promoting uniformity of urban design and construction across Iowa.

WHAT'S NEW?

Supplementals Posted!

Various revisions to the manuals have been approved by the SUDAS Board of Directors and are available for use as Design Supplementals and Spec Supplementals. These items will be included in the 2023 Edition of the SUDAS Design Manual in December.

Water Main and Sewer Separation Requirements

Effective March 16, 2022, 567 IAC 43.3 (2)“a”(3) was updated to replace subparagraph (3) with new subparagraphs (3) and (4) to allow for added flexibility for water main project design with regards to separation from sanitary and storm sewers. Click here for more information from the DNR. Click here to see the supplemental revisions for SUDAS.

Seed Shortages and Substitutions

Due to anticipated shortages of specified seed types, Roadside Development and the Construction & Materials Bureau have recommended allowable changes to the DOT’s seed mixes as follows for the 2022 construction season.

Permanent Rural mix due to the anticipated shortage of Perennial Ryegrass (Linn):

2601.03, C, 3, b, Seed Mixture.

Add note to Table 2601.03-3:

* For 2022 construction season only, ryegrass rate may be reduced to 30 pounds per acre as long as the fescue rate is increased to 150 pounds per acre.

Permanent & Stabilizing Urban mixes due to the anticipated shortage of Creeping Red Fescue:

2601.03, C, 2, b, Seed Mixture.

Add note to Table 2601.03-2:

  1. For 2022 construction season only, a partial or full substitution of the required 25 pounds of Creeping Red Fescue is allowed with any of the following varieties:  Chewing Fescue, Hard Fescue, Sheep’s Fescue or Blue Fescue.

2601.03, C, 4, b, Seed Mixture.

Add note to Table 2601.03-4:

  1. For 2022 construction season only, a partial or full substitution of the required 25 pounds of Creeping Red Fescue is allowed with any of the following varieties:  Chewing Fescue, Hard Fescue, Sheep’s Fescue or Blue Fescue.

Seed supply issues can be found on the following website for reference:  https://iowadot.gov/construction_materials/Earthwork-and-erosion-control.

Iowa DNR Review

The Iowa DNR Water Supply Engineering Section conducted a review of the 2022 Edition of SUDAS Specifications Divisions 3 and 5. In a letter addressed to SUDAS staff, Iowa DNR stated “at the current time, they are in accordance with the design standards of this Department and will be filed accordingly.” Click here for a copy of the letter.

Public Works Service Bureau

SUDAS staff has created a Public Works Service Bureau (PWSB). The PWSB provides a resource for public works staff members from cities of all sizes to connect with and learn from others how best to improve work efficiencies, learn new techniques, and maximize available resources.  Our goal is “communicate to innovate!”

Register as a member on the site. Once registered, you can view the information we only share with registered users, such as our street reports, member forums, and contact information for your fellow members. Check out our latest newsletter for more information, and visit us on FacebookTwitter, and LinkedIn

Modifying the SUDAS Manuals

If you need to modify the SUDAS manuals to meet your jurisdiction’s needs, please read this document first.

SUDAS Email List

Anyone who would like to receive emails from us can subscribe to our list.

Temporary Traffic Control

SUDAS staff developed an updated Temporary Traffic Control Handbook through an Iowa Highway Research Board project. If you would like to request a copy, please complete this form. Click here for an electronic version of the handbook.

Potential Errors

If you notice something within the SUDAS Manuals that appears to be an error, please contact Beth Richards (brich@iastate.edu) and let her know.

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