New sections have been added to Chapter 5 of the Design Manual (Sections 5K-1 through 5K-4) to address pavement preservation. Pavement preservation is a process used to treat pavements while they are still in good condition and not experiencing structural damage. The sections discuss the concepts, definitions, and benefits of pavement preservation programs. Typical causes of pavement deterioration for both flexible and rigid pavements are described. Information is provided that examines the pavement treatment types for both types of pavement. Additional design guidance is provided for the thin maintenance surfaces used to maintain flexible pavements, including seal coats, slurry seals, microsurfacing, and fog seals.ADA
Information regarding when alterations to the pedestrian signal elements of a traffic signal installation trigger the requirements for installation of accessible pedestrian signals was added. In addition, on-street parking requirements when parking spaces are marked or metered were added. Both requirements are in Section 12A-2 of the Design Manual.Manhole Rehabilitation
The first developmental specifications (DS Section 6021) dealing with cured-in-place manhole processes were approved. The specifications were put together due to requests from users but the products and there usage is still limited. As developmental specifications, they will not become part of the printed manual but will be on the website only. Users can download it at their convenience for project work.Seeding and Mulching
Updated Specifications Section 9010 based on user and seed producer input. Invasive species such as Reed’s Canary grass, Birdsfoot Trefoil, and Crownvetch were removed from the list of acceptable grasses because they are invasive. The Type 1 permanent lawn mixture was modified to delete the annual ryegrass due to improvements in shorter germination bluegrass cultivars, and the Type 2 permanent cool season mixture for ditches and slopes was modified to match the Iowa DOT mix. Adjustments were also made to the temporary erosion control mixes for both urban and rural applications. The mixture for native grasses and wildflowers was adjusted by decreasing the grasses and increasing the forbs (flowers). Fertilizer types and application rates were adjusted for different mixes.
The information in Specifications Division 10 (Utility Service Location Details) was moved to the Design Manual since it is meant for the jurisdiction and not the contractor. Specifications Division 11 (Demolition) was rewritten and updated as new Division 10. The figure addressing plugging wells was also updated and the specifications language moved from the figure to the body of the specifications.Construction Survey
With moving demolition to Specifications Division 10, a new Division 11 called "Miscellaneous" was created. The first miscellaneous section (Section 11,010) was developed. It includes specifications on construction survey when it is included in a contract as a bid item. Division 1, Section 1050, was modified so that construction survey provided by the Jurisdiction will also meet the requirements of Section 11,010.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
Check out our facebook page for SUDAS and "like" us!