subgrade
noun
sub·grade
ˈsəb-ˌgrād 
: a surface of earth or rock leveled off to receive a foundation (as of a road)
Examples of subgrade in a Sentence
Recent Examples on the Web
But before the work began, the leak grew into a flood that sent more than 250 million gallons of murky Chicago River water coursing through a turn-of-the-century underground tunnel system and up into the subgrade levels of buildings throughout downtown.
—
Kori Rumore, Chicago Tribune, 13 Apr. 2025
First, the road builders use rollers to pack the subgrade down.
—Mansour Solaimanian, The Conversation, 10 May 2024
Work includes removing the existing pavement, remediating unsuitable subgrade, installing an aggregate base and 8-inch of non-reinforced concrete pavement, installing under drains, installing a new catch basin and performing a storm sewer tap.
—cleveland, 7 Aug. 2022
The project also includes the removal and installation of drainage structures, sidewalks, curbs and gutters, utilities, canal excavation, base, subgrade and new pavement, Keller said.
—Austen Erblat, sun-sentinel.com, 1 Dec. 2021
The Eagle Lake project included rehabilitation of the existing 6 miles of carriage road surface, subgrade and drainage.
—From Usa Today Network and Wire Reports, USA TODAY, 4 Nov. 2021
Water flows through the cracks in a street and weaken the gravel base layer and the ground, called the subgrade.
—Laurinda Joenks, Arkansas Online, 17 Feb. 2021
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Kori Rumore, Chicago Tribune, 13 Apr. 2025
First, the road builders use rollers to pack the subgrade down.
—Mansour Solaimanian, The Conversation, 10 May 2024
Work includes removing the existing pavement, remediating unsuitable subgrade, installing an aggregate base and 8-inch of non-reinforced concrete pavement, installing under drains, installing a new catch basin and performing a storm sewer tap.
—cleveland, 7 Aug. 2022
The project also includes the removal and installation of drainage structures, sidewalks, curbs and gutters, utilities, canal excavation, base, subgrade and new pavement, Keller said.
—Austen Erblat, sun-sentinel.com, 1 Dec. 2021
The Eagle Lake project included rehabilitation of the existing 6 miles of carriage road surface, subgrade and drainage.
—From Usa Today Network and Wire Reports, USA TODAY, 4 Nov. 2021
Water flows through the cracks in a street and weaken the gravel base layer and the ground, called the subgrade.
—Laurinda Joenks, Arkansas Online, 17 Feb. 2021
Cite this Entry
“Subgrade.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subgrade. Accessed 31 Oct. 2025.
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