303 - Open Graded Drainage Course - Revision history

Jhudson-fishbeck at 17:33, 15 October 2025

2025-10-15T17:33:23Z

Jhudson-fishbeck: /* Measurement and Payment */

2025-10-15T16:49:18Z

Measurement and Payment

Jhudson-fishbeck: /* INSPECTION & TESTING */

2025-10-15T16:48:03Z

INSPECTION & TESTING

Jhudson-fishbeck: /* General Construction */

2025-10-15T16:47:42Z

General Construction

Jhudson-fishbeck: /* Control Strip */

2025-10-15T16:47:09Z

Control Strip

Jhudson-fishbeck: /* CONSTRUCTION */

2025-10-15T16:46:01Z

CONSTRUCTION

Jhudson-fishbeck: /* Pictures of Equipment */

2025-10-15T16:44:59Z

Pictures of Equipment

Jhudson-fishbeck: /* Pictures of Materials */

2025-10-15T16:44:27Z

Pictures of Materials

Jhudson-fishbeck: /* INSPECTION & TESTING */

2025-10-13T18:54:39Z

INSPECTION & TESTING

Jhudson-fishbeck: /* General Construction */

2025-10-13T18:54:27Z

General Construction

@@ Line 68: / Line 68: @@
 |+
 |-
-| [[File:303-001.jpg|200px|thumb|center|4G Aggregate Placed for Road Base]]
+| [[File:303-001.jpg|200px|thumb|center|'''4G Aggregate Placed for Road Base''']]
 |-
 |}
@@ Line 93: / Line 93: @@
 |+
 |-
-| [[File:302-002.jpg|200px|thumb|center|Auto Trimmer Equipped with AMG]] || [[File:303-002.jpg|200px|thumb|center|Bulldozer Placing Open-Graded Aggregate]]
+| [[File:302-002.jpg|200px|thumb|center|'''Auto Trimmer Equipped with AMG''']] || [[File:303-002.jpg|200px|thumb|center|'''Bulldozer Placing Open-Graded Aggregate''']]
 |-
-| [[File:Smooth drum roller.jpg|200px|thumb|center|Smooth Drum Roller]] || [[File:303-003.jpg|200px|thumb|center|Open-Graded Aggregate Being Placed on Geofabric Separator]]
+| [[File:Smooth drum roller.jpg|200px|thumb|center|'''Smooth Drum Roller''']] || [[File:303-003.jpg|200px|thumb|center|'''Open-Graded Aggregate Being Placed on Geofabric Separator''']]
 |-
 |}
@@ Line 160: / Line 160: @@
 |+
 |-
-| [[File:303-006.png|200px|thumb|center|Rutted Grade Used as a Haul Road for Concrete Trucks]]
+| [[File:303-006.png|200px|thumb|center|'''Rutted Grade Used as a Haul Road for Concrete Trucks''']]
 |-
 |}
@@ Line 191: / Line 191: @@
 |+
 |-
-| [[File:303-007.jpg|200px|thumb|center|Stockpile of Crushed Aggregate Onsite]]
+| [[File:303-007.jpg|200px|thumb|center|'''Stockpile of Crushed Aggregate Onsite''']]
 |-
 |}

@@ Line 224: / Line 224: @@
 * Open-Graded Drainage Course, Shoulder can be paid by the square yard or ton. If paid by the ton, scale weights will be used for all material placed with additives at a moisture of 8% or below. If moisture contents are above 8%, the excess moisture will be deducted from the scale weight tickets.
-Refer to Table 303-1 and Table 303-2 of the Standard Specifications for Construction for payment reduction factors for any in-place test results that do not meet gradation requirements.
+Refer to [https://mdotwiki.state.mi.us/images_construction/9/95/2020-Standard-Specifications-Construction.pdf#page=188 Table 303-1] and [https://mdotwiki.state.mi.us/images_construction/9/95/2020-Standard-Specifications-Construction.pdf#page=189 Table 303-2 of the Standard Specifications for Construction] for payment reduction factors for any in-place test results that do not meet gradation requirements.
 === Documentation ===

@@ Line 191: / Line 191: @@
 |+
 |-
-| [[File:303-007.jpg|200px|thumb|center|'''Stockpile of Crushed Aggregate Onsite''']]
+| [[File:303-007.jpg|200px|thumb|center|Stockpile of Crushed Aggregate Onsite]]
 |-
 |}

@@ Line 160: / Line 160: @@
 |+
 |-
-| [[File:303-006.png|200px|thumb|center|'''Rutted Grade Used as a Haul Road for Concrete Trucks''']]
+| [[File:303-006.png|200px|thumb|center|Rutted Grade Used as a Haul Road for Concrete Trucks]]
 |-
 |}

@@ Line 139: / Line 139: @@
 * Must be 600 to 1,000 feet in length.
 * Means and methods of constructing the control strip, including the establishment of a roller pattern, must be documented and match the methods that will be used during full production placement.
-* After compaction and final trimming, the Engineer will obtain in-place samples from the control strip to test for loss by wash and gradation per Table 902-1 of the Standard Specifications for Construction.
+* After compaction and final trimming, the Engineer will obtain in-place samples from the control strip to test for loss by wash and gradation per [https://mdotwiki.state.mi.us/images_construction/9/95/2020-Standard-Specifications-Construction.pdf#page=824 Table 902-1 of the Standard Specifications for Construction].
-** Per Subsection 303.03.D of the Standard Specifications for Construction, the Contractor is to provide mechanical assistance for sampling from the grade when the layer thickness is greater than 4 inches.
+** Per [https://mdotwiki.state.mi.us/images_construction/9/95/2020-Standard-Specifications-Construction.pdf#page=185 Subsection 303.03.D of the Standard Specifications for Construction], the Contractor is to provide mechanical assistance for sampling from the grade when the layer thickness is greater than 4 inches.
 ** Sampling occurs in various locations throughout the test strip with samples from each location being blended together prior to gradation testing.
 * Density will be verified by the MDOT representative to meet the requirement of 95% of the maximum unit weight with a moisture content of optimum or below.

@@ Line 133: / Line 133: @@
 ==[[#CONSTRUCTION|CONSTRUCTION]]==
-The subbase or existing grade should be accepted prior to the aggregate base course being placed. The grade should not be frozen, soft, rutted, or generally unstable prior to placement of the aggregate base course. Due to the increased void space, a separator layer is needed between the OGDC and the layer of material below it to prevent intermixing and loss of support. Typically, either a dense graded aggregate layer or geotextile separator are installed to create a separation between the OGDC and the subbase or subgrade. Refer to Section 302 and Section 308 of the Standard Specifications for Construction for proper installation of aggregate base course and geotextile separator.
+The subbase or existing grade should be accepted prior to the aggregate base course being placed. The grade should not be frozen, soft, rutted, or generally unstable prior to placement of the aggregate base course. Due to the increased void space, a separator layer is needed between the OGDC and the layer of material below it to prevent intermixing and loss of support. Typically, either a dense graded aggregate layer or geotextile separator are installed to create a separation between the OGDC and the subbase or subgrade. Refer to [https://mdotwiki.state.mi.us/images_construction/9/95/2020-Standard-Specifications-Construction.pdf#page=180 Section 302] and [https://mdotwiki.state.mi.us/images_construction/9/95/2020-Standard-Specifications-Construction.pdf#page=206 Section 308] of the Standard Specifications for Construction for proper installation of aggregate base course and geotextile separator.
 === Control Strip ===