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Promoting uniformity of urban design and construction across Iowa.

What's New

Expanded Product Listings

At their last meeting, the SUDAS Board of Directors approved various revisions to the specifications to allow additional products. The detailed changes are shown on the Supplemental Specifications page and will be included in the 2016 Edition of the SUDAS Specifications. Within Section 4010 (Sanitary Sewers), product and depth of bury requirements for 12 to 36 inch polypropylene pipe were added; also expanded the sewage air release valve specifications. Within Section 4020 (Storm Sewers), we added product and depth of bury requirements for reinforced concrete elliptical pipe for horizontal and vertical installations. Within Section 6010 (Structures for Sanitary and Storm Sewers), product and installation requirements for expanded polypropylene adjustment rings were added; modified the polyethylene adjustment ring information to prohibit use with heat shrink infiltration barriers; added product and installation information for heat shrink infiltration barriers.

Permeable Interlocking Pavers

Both a new design section (5L-1) and a new specifications section (7080) for permeable interlocking pavers have been added.  Permeable interlocking paver pavements are designed to infiltrate stormwater runoff by passing the stormwater through the surface and storing it in the aggregate subbase.  In pervious subgrades, the runoff infiltrates into the soil.  For less permeable subgrades, the runoff is controlled by a subdrain to slowly discharge the stormwater.  The use of permeable interlocking pavers can result in stormwater runoff conditions that approximate the predevelopment site conditions for the immediate area covered by the pavers.  Structural and hydraulic design procedures are detailed.  Design and specifications information is included for both concrete and clay brick pavers.

Complete Streets

Across the country and in Iowa, there is a growing movement of citizens asking agencies to change the way they look and streets and the function of streets within their communities.  These citizens are asking that the streets be made “complete.”  Complete streets are designed to create safe facilities for vehicles, pedestrians, bicyclists, and transit users regardless of age or physical abilities.  Actual design information to meet these planning objectives is not immediately available.  New Design Manual Section 5M-1 identifies the elements that should be considered in addressing a complete streets deign.  The most important element is to make sure the design fits the context of the surrounding area, as well as meets the needs of all appropriate users.

PCC Pavement Jointing and Widening

The versions of Figure 7010.901 and 7010.902 that were included included the 2015 Edition of the SUDAS Standard Specifications were old versions. The versions included on this website have been corrected. We apologize for this mistake. We will include the correct versions of the figures in the 2016 Edition revisions.

Miscellaneous Specifications

Five new sections have been added to the Specifications Manual in Division 11 (Miscellaneous). Go to the Supplemental Specifications page to see these new sections.

  • Deleted the mobilization information that was in Section 1090 and developed a new section (11,020) that provides for disbursement of the mobilization cost when it has been identified as a bid item.
  • Developed a new section for pavement markings (11,030) that parallels the Iowa DOT requirements for construction projects and can also be used as stand-alone specifications to bid only pavement markings.
  • Maintenance of postal service and coordination of solid waste collection activities is included in a new section for temporary services during construction (11,040).
  • A new section for temporary sidewalk access (11,050) provides requirements for temporary residential access and temporary public sidewalk access, including construction, maintenance, removal, and restoration.  In addition, requirements for temporary longitudinal channelizing devices are included.
  • Requirements for concrete washout facilities are identified in Section 11,060.  Both manufactured containment and non-manufactured containment systems are included.
SUDAS Manuals

PLEASE remember the SUDAS program consists of two manuals - the Design Manual and the Standard Specifications. If you have both manuals in your office, please make sure you carefully read anything we mail to you. The binders for the two manuals look very similar or might be the same (depending on when you purchased your SUDAS Standard Specifications). This does not mean it's the same manual!!! If you have questions about your manuals, please compare the contents of the manual to this website or call us for clarification.

SUDAS mail lists

If you own copies of the SUDAS manuals, please make sure to let us know when your address or point of contact might change. Since we issue annual revisions for free to current manual holders, we rely on you to let us know when something changes.

SUDAS district meetings

If you are interested in participating in the SUDAS district meetings, check out the district meeting page and contact Beth Richards (

SUDAS on Facebook

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