Hennepin County

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PROJECT QUESTION: Are we still performing the mapping?

Q: Are we still performing the mapping? If so, is the mapping dictating what type of Sealer (HMWM for Silane) application will be applied? It appears the Addendum is dictating HMWM for bridge decks and Silane for the sidewalks regardless of mapping results. Is the mapping and cleaning still being performed and paid for under the Deck Cleaning item?

A: Crack mapping is no longer part of the project however deck cleaning remains. We have decided to treat all horizontal bridge deck surfaces with MMA including sidewalk. This will include pretreatment of cracks as described in the updated provision SB-5. All vertical traffic-side faces will be treated with the penetrating sealant silane with the exception of the top of barrier which will also receive the silane penetrant.