301 - Subbase - Revision history

Clarkj25: /* INSPECTION & TESTING */

2025-09-08T17:21:27Z

INSPECTION & TESTING

2025-09-08T17:20:40Z

CONSTRUCTION

2025-09-08T17:19:38Z

Photos of Materials

2025-09-08T17:18:58Z

CONSTRUCTION

2025-09-08T17:18:42Z

CONSTRUCTION

2025-09-08T17:17:29Z

Photos of Equipment

2025-09-08T17:13:47Z

Photos of Materials

2025-09-08T17:13:34Z

Photos of Materials

2025-09-08T17:10:12Z

2022-02-16T18:12:13Z

MEASUREMENT AND PAYMENT: added reference and link to 205.04 in 2020 spec book

@@ Line 150: / Line 150: @@
 #** If AMG is used by the Contractor, a surveyor with a Total Station and/or GPS should be utilized to check surface elevations of the subbase.
-[[File:301-016.jpg]]
+{| class="wikitable"
 === Testing ===

← Older revision		Revision as of 17:20, 8 September 2025
Line 110:		Line 110:
	Difficulty obtaining density may be attributed to a lack of sufficient moisture content. The Contractor may have to rewater the grade to maintain and achieve density.		Difficulty obtaining density may be attributed to a lack of sufficient moisture content. The Contractor may have to rewater the grade to maintain and achieve density.

−	[[File:301-014.jpg\|300px\|thumb\|left\|'''Additional Water being Applied to Aid in Densification''']]	+	{\| class="wikitable"
		+	\|+
		+	\|-
		+	\| [[File:301-014.jpg\|300px\|thumb\|left\|'''Additional Water being Applied to Aid in Densification''']]
		+	\|-
		+	\|}
		+

@@ Line 41: / Line 41: @@
 |+
 |-
-| [[File:301-001.jpg|300px|thumb|center|'''SClass II Sand Placed for Road Subbase''']] || [[File:301-004.jpg|300px|thumb|center|'''Class II Sand Being Placed for Road Subbase''']]
+| [[File:301-001.jpg|300px|thumb|center|'''Class II Sand Placed for Road Subbase''']] || [[File:301-004.jpg|300px|thumb|center|'''Class II Sand Being Placed for Road Subbase''']]
 |-
 |}

← Older revision		Revision as of 17:18, 8 September 2025
Line 110:		Line 110:
	Difficulty obtaining density may be attributed to a lack of sufficient moisture content. The Contractor may have to rewater the grade to maintain and achieve density.		Difficulty obtaining density may be attributed to a lack of sufficient moisture content. The Contractor may have to rewater the grade to maintain and achieve density.

−	[[File:301-014.jpg\|300px\|thumb\|~~center~~\|'''Additional Water being Applied to Aid in Densification''']]	+	[[File:301-014.jpg\|300px\|thumb\|left\|'''Additional Water being Applied to Aid in Densification''']]

@@ Line 110: / Line 110: @@
 Difficulty obtaining density may be attributed to a lack of sufficient moisture content. The Contractor may have to rewater the grade to maintain and achieve density.
-[[File:301-014.jpg]]
+[[File:301-014.jpg|300px|thumb|center|'''Additional Water being Applied to Aid in Densification''']]
 The subbase must be free from defects and contamination. Distorted areas in the subbase should be investigated for rutting or saturated subgrade. The Contractor must remove, repair, or replace damaged areas at no expense to the contract.

@@ Line 64: / Line 64: @@
 === Photos of Equipment ===
-<gallery>
+{| class="wikitable"
--006.jpg|''Gravel Train Truck Delivering Subbase Material''
+|+
--008.jpg|''AMG-Equipped Bulldozer Placing Sand Subbase Over Underdrain''
+|-
-Excavator-3.jpg|''Excavator''
+| [[File:301-006.jpg|300px|thumb|center|'''Gravel Train Truck Delivering Subbase Material''']] || [[File:301-008.jpg|300px|thumb|center|'''AMG-Equipped Bulldozer Placing Sand Subbase Over Underdrain''']]
-Smooth drum roller.jpg|''Smooth Drum Roller''
+|-
-</gallery>
+| [[File:Excavator-3.jpg|300px|thumb|center|'''Excavator''']] || [[File:Smooth drum roller.jpg|300px|thumb|center|'''Smooth Drum Roller''']]
 {{top}}

← Older revision		Revision as of 17:13, 8 September 2025
Line 38:		Line 38:

	=== Photos of Materials ===		=== Photos of Materials ===
		+	{\| class="wikitable"
		+	\|+
		+	\|-
		+	\| [[File:301-001.jpg\|300px\|thumb\|center\|'''SClass II Sand Placed for Road Subbase''']] \|\| [[File:301-004.jpg\|300px\|thumb\|center\|'''Class II Sand Being Placed for Road Subbase''']]
		+	\|-
		+	\|}

	<gallery>		<gallery>

@@ Line 51: / Line 51: @@
 ==[[#MEASUREMENT AND PAYMENT|MEASUREMENT AND PAYMENT]]==
-Subbase measured compacted in place will be documented and paid for by the “staked section” method.  When the pay unit is loose measure, then the volume of the hauling units will need to be determined. The Contractor must provide load tickets for each load.
+Subbase measured compacted in place will be documented and paid for by the “staked section” method which is explained in [https://www.michigan.gov/documents/mdot/MDOT_2020_Construction_Specifications_Book_WEB_728364_7.pdf#page=158 section 205.04].  When the pay unit is loose measure, then the volume of the hauling units will need to be determined. The Contractor must provide load tickets for each load.
 If the pay item '''Grading and Compacting Existing Material''' is included in the contract, it will be paid by the square yard which will be determined by the actual dimensions of the work done.  It will include any additional water needed to achieve compaction.
 {{top}}