April 2019 District Agenda
- Minutes of the previous meetings and schedule of district meetings
The minutes of the April meeting will be considered. The schedule of district meetings will be presented.
- Board of Directors meeting minutes
A summary of actions from the October Board electronic vote will be presented.
Design Manual Items
- Clear zones in urban areas (Section 5C-1, Table 5C-1.05)
Set the preferred and acceptable clear zone on low speed urban roadways without consideration for roadway classification.
- LED street lighting (Chapter 11)
Updated chapter to reflect use of LED street lighting.
- Temporary traffic control (Sections 13B-1 through 13B-6)
Added section on the design requirements for work zone traffic control.
Specifications Manual Items
- MAPLE abbreviation and definition (Section 1010, 1.02 and 1.03)
Added abbreviation and definition in order to reference MAPLE within the specifications.
- Compaction testing for subgrade cut sections (Section 2010, 3.06)
Clarified that moisture and density elements should be used for compaction in subgrade cut section compaction.
- Linear trench drain (Section 4020, 1.08, 2.02, 3.04, and Figure 6010.521)
Added linear trench drain as joint SUDAS/Iowa DOT specifications and figure.
- Pipe rehabilitation (Section 4050)
Revised the pipe rehabilitation section based on current practices/products.
- Intakes (Section 6010, 2.01 and Figures 6010.515, 541, 542, and 545)
Developed a new figure for a double well area intake. Added three Iowa DOT figures – open-throat curb intake under pavement, extension unit for open-throat curb intake under pavement, and single open-throat curb intake with extended opening.
- Adjustable casting (Section 6010, 2.01, D; 3.01, J; and Figures 6010.601 and 602)
Revised text and figures to allow for an additional adjustable casting.
- Cementitious mortar liner with epoxy seal (Section 6020, 2.03)
Developed ranges as opposed to a single value to allow for more products.
- Honeycomb repair (Section 7010, 3.02)
Added information for honeycomb repair of non-formed paving.
- Driveway drop curb heights (Figures 7010.102 and 7030.101)
Resolved differences in drop curb heights in new PCC pavements and driveway sections.
- Boxouts in HMA pavements (Figure 7020.201)
Expanded options for jointing when HMA is extended through the boxout to the casting.
- High performance thin lift overlays (Spec Sect 7021, 2.04, C; Design Sect 5J-1, C, 1, b)
Modified binder grade to ensure adequate crack resistance properties.
- Driveway flares (Spec Figures 7030.101 and 102; Design Section 5L-4, C)
Clarified that the flare should be 3 to 5 feet for residential and agricultural driveways.
- Temporary traffic signals (Section 8010, 1.08 and 3.06)
Expanded payment and removal process for temporary traffic signals.
- Discussion items
- Provide additional guidance on construction staking when 3D design models are available? Committee to develop?
- Identify specific trench dewatering control techniques (gravity bag filter, gravity tank, etc.)?
- Erosion and sediment control applications:
- Add slash berms?
- Add anchored temporary coverings?
- Delete compost filter berms?
- Should we add bid item and execution elements for abandoning water mains?
- Should we specifically identify the type of water valve tapping assembly in bid item and product sections – wet tap or insertion?
- As their use increases, do 3D plans ever become the plans that govern?
- Products and/or research
Page revised: April 1, 2019