Issuance Letter for M-606-1 MGS 31-inch & D-606-2 MGS 31-inch without Blocks - December 21, 2018
https://www.codot.gov/business/designsupport/standard-plans/mash-memos/m-606-1-issuance-letter
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Issuance Letter for M-606-1 MGS 31-inch & D-606-2 MGS 31-inch without Blocks - December 21, 2018