Fort Peck Unwatering Pump Question and Answers 6-4-25.pdf

Fort Peck Unwatering Pump

Questions:

Following yesterday’s site visit, please see the following questions:

- Can you confirm where the Contractor will be permitted to stage their jobsite office trailer onsite? As well, is USACE able to supply power for the jobsite office trailer?

Contractor job trailer is permitted, and power is not available from USACE. Due to multiple other ongoing contractors’ trailers that could be onsite at the time of this work, the location the trailer is dependent on the size of the trailer. Desk space is available in the erection bay are for office work.

- The PWS details a 240-day period of performance. Based on anticipated equipment lead time, and the mandatory outage of 9 Mar 2026 through 23 May 2026, would USACE consider allowing the period of performance to be extended? No Change due to project completed before the outage window of 9 Mar - 23 May 26 and before the bridge crane contractor shows up at the beginning of June through September.

- The PWS details that payment will be made upon the completion of all work. Will

USACE support mutually agreeable progress payments? No change.

- The PWS details the replacement 12” strainer to have a cast-iron body. Would USACE permit alternative strainer body materials, such as stainless steel? Cast-iron strainers can often present lead time and Buy American / Trade Agreement challenges. Stainless steels or cast steel (painted) would be acceptable material for the strainer material. The particular strainer would be subject to the product review as defined in the PWS.

- In discussion with various pump suppliers, providing accurate and competitive pricing will require additional time. Will USACE extend the bid due date? Offer Response Due

Date has been changed from 6 June 2025 to 20 June 2025 by 2:00 PM CT.

- The PWS details that the Contractor is to supply 3,000 GPM of temporary pumping capacity while the existing unwatering pumps are no longer operational. The PWS also details that one Government sump drainage pump shall remain operational during this time. Does the pumping capacity of the sump drainage pump contribute to the 3,000

GPM of temporary pumping capacity? If so, please confirm the GPM of the sump drainage pump. The existing sump pumps have a capacity of 175GPM each (two total).

These pumps are typically enough capacity to maintain the sump elevation and not allow the water to overflow the sump. The main unwaterting pump that are being replaced under this contract are designed to assist with sump elevation control if the sump float reaches the upper limits of the float system. In a certain rare situation, the existing unwatering pump may have to assisted if the sump elevation approaches overflowing the sump. The current condition of the remaining unwatering pump was tested to have a flow rate of 1400GPM, so in a high sump situation the capacity current would be approx.

1750GPM from the system. The contractor must control the sump water elevation such that the sump water elevation does not exceed 2022.5’ EL and is at an acceptable level for the contractor personnel to complete the sump component replacement.

- The instruction to offerors says under item (4) to include, “All required technical, past performance, and price factor information stated in FAR 52.212-2, Evaluation –

Commercial Items;” This section is not included in the solicitation documents, what would you like the offeror to provide here? Is there any required technical or past performance information? Evaluation Criteria is listed under FAR 52.212-2 on page 23 of the solicitation. “Evaluation - Commercial Products and Commercial Services”

- The PWD details that the flowmeters are to be combined meter/transmitter units. Please confirm that flowmeter integration with existing controls/SCADA is part of the project scope. The flowmeters described in paragraph X are intended to be stand alone meters not integrated into SCADA. The readout location in paragraph X is for the pump operators benefit/manual recording while operating the pumps.

- The PWD details the replacement in-kind of the existing Farval automatic grease system.

Can USACE please provide additional information regarding grease system integration with existing controls/SCADA? The existing farval is not connected to SCADA. It is operated on a local timer during the pump operation and during pump startup.

- Are the existing two (2) unwatering pump assemblies integrated into controls/SCADA? If so, please share additional information regarding the required integration of the new pumps with facility controls/SCADA. The two existing unwatering pumps are not integrated into SCADA. The pumps are operated manually during unit maintenance or controlled by a localized electric float/elevation controller the rest of the time.

- Attachment E SCA 2015-5395 Rev 24 12_23_2024 details wage determinations for this solicitation. Are the rates listed for each occupation code / title representative of a combined fringe and wage rate? Or, are the rates listed for each occupation code / title only representative of fringe? The wage determination provided was included for the service portion of the work specified. Please review the wage determination.

- The existing pump discharge flanges are a tee-wye shape. Would 90-degree tees be acceptable instead? Yes, 90-degree T’s would be acceptable instead of the tee-wye currently.

- Per the project scope of work, a majority of the 12” piping below the unwatering pumps will be replaced, including the discharge tee-wye shape flanges. Are the new discharge tee flanges to be installed at the same elevation of the existing tee-wye shape flanges? If so, can USACE please share these elevations? The new discharge plumbing can be installed at new elevations, but the new discharge pipe arrangement cannot contact the work platform currently located below the existing discharge pipes. The floor of the work platform above the 175GPM sump pumps is approx. 10’-9” above 2022.5’ El. With a railing height 42” above the work platform floor.

- Are there additional requirements for the replacement 12” strainer beyond what is listed in the PWS? Additional details would be helpful in ensuring the appropriate strainer is supplied for the specific function intended. The exiting strainer is a fairly course strainer without a removable basket of any kind. The ‘straining’ element in the existing component is composed of a few metal bars inside the strainer housing.