Amendment 1 4 Q and As 0001

GOGA 336173 – Repair Conzelman Road, 140P2026R0106
Drilled Shafts, Wall and Foundations
Q1. Pile length. Drawing S1.0 requires a minimum pile embedment of 25 feet below existing ground surface, while Elevation 2 on the same sheet dimensions 21'-0" below the wall panel. Please provide the required tip elevation or total length for each of the six 30-inch shafts. A1. The required minimum total length for each of the shafts is 28’-0”. Q2. The geotechnical report anticipates some very hard weathered sandstone, shale, and chert bedrock, and it suggests that rock definitions be included in the bid documents. Those definitions cannot be found in the specifications and wanted to check with you so we can price the work accurately.
A2. Definitions of rock excavation have not been included in the bid documents because this contract is intended to be awarded as a lump sum, with no unit pricing for different types of excavation. Please refer to the geotechnical report for information about the nature of material to be excavated. The report includes details about the strength, weathering, fracturing, and rock quality designation (RQD) for the two borings that were made (see diagrams starting on p. 49), as well as definitions of the terminology used (see Rock Classification Types defined on p. 65). The report also includes geophysical survey findings that may be interpreted for depth to lessweathered bedrock (see explanation on PDF p. 71 and figures on pp. 75-76). Q3. To ensure all bidders are working from the same understanding, could you help clarify which of the following the Government intends?
A3a. All shaft drilling to the required tip elevation, whatever material is encountered, is included in the lump sum price - This is what the Government intends; or A3b. If the Government would prefer to handle rock separately, could you share how "rock" and "obstructions" will be defined for this project? - This is not what the Government intends.
Q4. Wall location. The civil drawings (C1.0, X1.0, X1.1) locate the work between approximately STA 2+27 and STA 3+08, while structural Drawing S1.0 shows the 51-foot wall between approximately STA 4+20 and STA 5+40. Please confirm the wall location and which stationing governs layout.
A4. The stationing on the civil drawings governs. The civil drawings show roadway excavation starting at approximately STA 2+27 and ending at STA 3+08, but wall construction starting at STA 2+42 and ending at STA 2+93. Both civil and structural drawings show the wall