Hennepin County

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PROJECT QUESTION: We have analyzed the work to be completed during the ABC Construction period, June 8, 2016 to August 31, 2016, using a resource-loaded CPM schedule. We do not think the productions shown in the assumptions on page B10 are achievable. What historical data was used to determine the production rates listed?

Question: We have analyzed the work to be completed during the ABC Construction period, June 8, 2016 to August 31, 2016, using a resource-loaded CPM schedule. We do not think the productions shown in the assumptions on page B10 are achievable. What historical data was used to determine the production rates listed?

Response: We assume you are referring to the assumptions on sheet B10, Approximate ABC Time Frame, Note 3. This work is unique and historical information for specific tasks is not available. However, production rates of high capacity equipment like ringer cranes and stiff-legged derricks along with coordination of barges and assumptions on crane locations and support were evaluated to determine the removal and placement rates. These removal and placement rates were used to develop the anticipated: number of cranes, crane location, activity duration, work days and hours. Cranes were assumed to be located as follows:
Crane 1 - Located on W approach serving W abut, span 1 and W portion of Pier 1.
Crane 2, high capacity - Located in center of span 2 serving span 2, pier 1 and pier 2
Crane 3, high capacity - Located on barge serving span 3, pier 2 and pier 3
Crane 4 - Located on barge serving spans 2, 3 and 4
Crane 5, high capacity - Located in center of span 4 serving span 4, pier 3 and pier 4
Crane 6 - Located on E approach serving E abut, span 5 and E portion of Pier 4.
The Contractor shall develop and determine their own resource plan to construct and complete the work within the ABC period required to meet specifications. Additionally, it is up to the Contractor to determine their production rates, and resources to complete the work within the ABC time frame.