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Bolton & Menk, Inc. <br />Revised Proposal QTB174511 <br />March 28, 2023 <br />Page 2 <br />Site Access <br />Based on our understanding of the existing highway alignment, we propose to utilize a trailer -mounted <br />coring rig. Depending on roadway conditions, potential utility conflicts, and investigation requirements, <br />our field crew will select locations throughout the proposed project as needed to obtain materials for <br />laboratory design. <br />We have assumed that the fees associated with the required Right of Way (ROW) permit(s), if any, will be <br />waived by the city. <br />Cores and Hand Auger Borings <br />We propose to complete 23, 8-inch diameter cores along the existing highway alignment. Within each <br />corehole, underlying base material will be collected using a combination of the cuttings from hand auger <br />borings and shoveling. Sufficient aggregate base will be collected to properly proportion the aggregate <br />base and RAP (cores) in the design procedure. <br />We will backfill the coreholes and patch the surface cold bituminous patch. Over time, subsidence of core <br />backfill may occur, requiring releveling of surface grades or replacing bituminous patches. We are not <br />assuming responsibility for re -leveling or re -patching after we complete our fieldwork. <br />Traffic Control <br />Since coring will be performed within the roadway, traffic control will be required to alert motorists of <br />our work and protect our field crew. Based on traffic volumes of about 2,390 vehicles per day, flaggers <br />will be required. The cost for traffic control is included in our estimate. <br />Sample Review and Laboratory Testing <br />Bituminous cores and aggregate base samples will be returned to our laboratory in Bloomington, <br />Minnesota. Cores will be cold -crushed and mixed with the aggregate base at the proper ratio based on <br />the average in -place bituminous thickness and the reclamation depth of 8 inches. Next, the SFDR with <br />emulsion mix design will be performed on the combined materials. <br />If after review of the materials it appears that additional testing would be required for successful <br />completion of the design analyses, we will request authorization for the additional testing through a <br />Change Order. <br />Reporting <br />An SFDR mix design report will be provided that includes the Engineered Emulsion type and the <br />recommended application rate. <br />An electronic copy of our report will be submitted to you. <br />BRAUN <br />I NTE RTEC <br />