Chanhassen Explains Mill and Overlay Road Technique
The City of Chanhassen released an educational video explaining its mill and overlay road construction technique as part of its ongoing pavement management plan.
The city manages approximately 119 miles of streets, reviewing and grading sections every three years to prioritize repairs based on available funding. Mill and overlay is used for roads scoring between 60 and 80 on the city's 100-point Overall Condition Index, which rates road health.
The technique involves grinding off the top layer of a road surface and installing new pavement. According to the city, this structural improvement extends a road's life cycle by approximately 15 to 20 years while saving costs compared to more extensive reconstruction.
The city uses mill and overlay when roads show signs of deterioration such as cracking, but the underlying aggregate base and sub-layer remain in good condition. The lower the road's condition score, the deeper the city must mill and remove from the surface.
Residents can find more information about current projects at chanhassenm.gov/projects. The educational video is part of a series explaining the city's pavement management plan and various construction techniques.
This story was created by artificial intelligence (a large language model) based on the proceedings captured in the video below.
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Pavement Management Plan and Mill and Overlay Technique in Chanhassen
▸Meeting Analysis
▸Source Document
[0:00] the city of Chanhasson manages
[0:02] approximately 119 miles of streets in
[0:04] their upkeep We review and grade
[0:06] sections every 3 years Based on funding
[0:08] we prioritize what roads need work and
[0:11] schedule construction and repairs This
[0:14] is our pavement management
[0:17] plan One technique the city uses to
[0:19] rehabilitate our streets is a procedure
[0:21] called mill and overlay Mill and overlay
[0:23] is a road construction technique that
[0:25] involves grinding off that top layer of
[0:27] a road surface and installing a new top
[0:29] layer of pavement This is a structural
[0:31] improvement that extends a road's life
[0:33] cycle We use this construction technique
[0:36] when a road starts showing signs of
[0:37] deterioration and scores somewhere
[0:39] between the 60 to 80 range on the
[0:41] overall condition index A 100point scale
[0:43] we use to rate a road's health Although
[0:45] we use the OCI to address road
[0:47] rehabilitation keep in mind that other
[0:49] engineering factors may play a role in
[0:51] the selection process For more
[0:53] information on the selection process
[0:54] make sure to check out the first video
[0:56] in our pavement management series Those
[0:58] ranges indicate that the pavement is
[0:59] starting to show signs of distress such
[1:01] as cracking but the underlying aggregate
[1:04] base and sub layer are still in good
[1:06] condition The lower the score the deeper
[1:08] we have to mill and the more that we
[1:10] have to take off the top Regardless of
[1:13] how much is mil just replacing that top
[1:15] layer alone saves a ton of cash and
[1:17] gives the road an approximate 15 to 20
[1:20] year boost in life expectancy That's
[1:22] milling overlay a road construction
[1:24] technique that replaces the top layer of
[1:26] the road and extends its life cycle For
[1:28] more information about why we choose
[1:30] certain repair methods over others an
[1:31] overview of the construction process and
[1:33] more intensive construction techniques
[1:35] make sure to check out the other videos
[1:37] in our pavement management plan series
[1:39] For more information about the projects
[1:41] happening around Chanhassen make sure to
[1:42] check out chanhassenm.gov/projects
[1:46] [Music]
This story was created by artificial intelligence (a large language model) based on the proceedings captured in the video below.
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