B09_Amd_5_LAKE_254108_Q_A_5_27_25_0005.xlsx
XLSX spreadsheet 28 KB Posted
- Attached to
- LAKE 254108 Calville Bay Barge Relocation
- Solicitation number
- 140P2025R0016
About this file
This file is a Questions and Answers (Q&A) document for the LAKE 254108 Calville Bay Barge Relocation project solicitation (140P2025R0016) issued by the National Park Service. The document covers critical details about the project, including clarifications on wave attenuator specifications, water levels, design criteria, and site-specific requirements. Key updates include confirming the wave attenuator as an optional line item, extending the bid due date to June 23, 2025 at 14:00 MT, and providing guidance on site-specific challenges such as dust control, excavation, and utility coordination.
The Q&A addresses multiple technical aspects of the project, such as wave load calculations, anchor block construction, road access, boulder placement, and environmental considerations like asbestos abatement and soil contamination. Notable requirements include hot-dipped galvanization for steel barge and wave attenuator materials, on-site concrete anchor block casting, and coordination with NV Energy for utility work. The project involves relocating a barge in a sensitive environmental area, with specific instructions for cultural resource protection and inadvertent discovery protocols. Bidders are advised that while the wave attenuator is listed as an option, it is essentially required for project functionality and equipment warranty.
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Sheet1
| LAKE 254108, 140P2025R0016 Questions | Government Response | |
| 1 | -Specifications, Part 3- Executions |
-C, Contract Line Item No: 3 Wave Attenuator
| Question: During the pre-bid meeting it was noted that Contract Line Item No: 3, Wave Attenuator will be changed from Line Item3 to a "Add Option". Can the National Park Service please confirm. | Amendment 3 updated the specifications to match the solicitation where the wave attentuator is an option. | |
| 2 | -Specifications, 1.5 General Design Criteria, F 1a: States a significant wave height of 1.5ft. |
Question: There is a discrepancy in these specifications compared to SECTION 35 51 13.02 – FLOATING WAVE ATTENUATOR, 1.5, E, Wave loads
a. Significant wave height of 3 feet.
b. Maximum wave height of 4.6 feet.
c. Wave period equal to 3.3 seconds.
| Please clarify. | Section 1.5 E is correct. | |
| 3 | -Specifications, Floating Wave Attenuator, 1.5 General Design Criteria |
G. The design water levels, based on the 1988 North American Vertical Datum (NAVD88) are:
The design water levels, based on the 1988 North American Vertical Datum (NAVD88) are:
1. Extreme High-Water Level: +1,200 feet NAVD88
2. Current Water Elevation: +1,060 feet NAVD88
3. Extreme Low Water Level: +950 feet NAVD88
| Question: What is the anticipated water level at time of wave attenuator installation? | Given that the construction sequencing and schedule is the contractor's responsibility, an exact water level can not be given due to the seasonally changing lake levels. A range of anticipated values is available from the Bureau of Reclamation who releases a 2-Year Probablistic Projection of the Lake Mead Water Level. Here is the website for reference: https://www.usbr.gov/lc/region/g4000/riverops/crmms-2year-projections.html. Please refer to this website for the range of anticipated values. | |
| 4 | 1. Wave Loads (WavL) shall be calculated based on the following minimum values, maximum |
possible wave caused by the highest significant wave, or the maximum wind wave generated, whichever is greater. Use local values if such values exceed the minimums provided.
a. Significant wave height of 3 feet.
b. Maximum wave height of 4.6 feet.
c. Wave period equal to 3.3 seconds.
LAKE 254108
072624 035 51 13.02 - 7
FLOATING WAVE ATTENUATOR
d. Wavelength equal to 36 feet.
| e. Fetch equal to 3 miles. Question: Can the contractor/wave attenuator manufacture rely on the design data given in the bid documents or is it the intention for the prime contractor/wave attenuator manufacture to engage with a coastal engineering firm to provide their own wind wave study? Any such study would add thousands of dollars to the project, cannot be performed prior to the bid, and would duplicate the work already performed by the Owner’s engineer. Please confirm the bidders can rely on the design criteria provided to establish their cost proposal and no further studies are required on establishing the design criteria. If the Owner requires the bidder to provide a duplicate study, how does the contractor change their design/cost if the wind wave study shows the design values of the bid are greater than the bid documents? | A wind and wave study has been performed and used to determine the design criteria provided in the bid documents. The contractor shall use the values specified in the bid documents. | ||
| 5 | Question: During the pre-bid walk through it was noted that there is existing water intake pipe on land that has been abandoned in place. Is the contractor to remove/dispose of the abandoned pipe not shown on the plans? If so, can NPS state how long, weight and amount of pipe to be removed and disposed. | For bidding purposes, please assume an additional 500 lf of hdpe pipe (same size and thickness as existing) for the abandoned water line to be disposed of in addition to the existing water line. | |
| 6 | Question: Does the barge material and wave attenuator, if made from steel need to be hot-dipped galvanized? | Yes. | |
| 7 | Question: Will NPS grant a minimum 3- week bid extension to allow bidders enough time to evaluate the answers from NPS and put together a comprehensive bid. RFI's are due May 13. A bid date of May 23 does not give enough time. | Yes. The bid due date is extended to June 23th, 2025 at 14:00 MT via Amendment 5. | |
| 8 | Question: Does the NPS have the bathymetric survey file they can share with bidders? This is important to see distances and depths for anchor layout locations. | Yes there is a bathymetric survey file, which will be shared with bidders in this amendment. The contract drawings have bathymetric survey data and approximate distances to the anchor location with respect to the barge. The contractor shall confirm depths at time of installation. | |
| 9 | Question: Will NPS allow the contractor to cast the concrete anchor blocks onsite? This option will save NPS money on the project by reducing shipping cost on concrete anchors. | Yes. | |
| 10 | Plan Page G2 Site Specific Notes: Has a requirement to First Construct a Road between Stations 76+00 and 89+00. Please confirm the requirement to build a road that will be excavated for placement of Utilities? | The contractor will not be allowed access to the ridge line between the barricades shown on the plans, see Sheet C2 and C3. In order to access the rest of the project site, after Station 76+00, an access road will need to be constructed. The contractor may install the waterline and electrical conduit while constructing the access road from 76+00 to 89+00. If the access road is initially built without the waterline or electrical conduit, the contractor will need to come back to excavate it. | |
| 11 | 24” Boulders are identified on the plans both at the entry way and Equipment Site Plan. Can we get an estimated quantity for these Boulders? Will the “color” approved by the Contracting Officer be based on Local Availability? Can we get an install Detail? | Detail 3/C8 states that the contractor to install boulders on 10 feet of either side of the access road while there are also boulders shown on sheet C6. The boulders do not require stacking and may be laid in a singular line. Vegetation or rocks larger than 2" shall be removed from the ground to ensure that the boulders are placed on a flat, firm surface. Please refer to these sheets to estimate the number of 24" boulders required. The color will be based on local availability and shall match the Loop D Campground surrounding colors. | |
| 12 | Sheet C10 shows a Water Bar Detail, can you identify on C1 Profile Plan, where and how many we’re expected to install? | Water bars are specified for the Cross Slopes with Variable Cut/Fill Access Road detail (1/C11). This access road cross section is specfied from Sta 75+00 to Sta 89+00. Please refer to the roadway slope and the spacing on the water bar detail to estimate the number of water bars that will be required. | |
| 13 | NV Energy – Can we still get substantial completion if we’re waiting on NV Energy to complete their work or documentation? In our experience they can take upwards of a couple of years to closeout on a project. | NVEnergy's work is required to power the new barge water intake system which must be commissioned prior to demolition of the existing system, thus substantial completion would not be given prior to completion of their work, however if the new intake system is commissioned and functional, it would be acceptable to NPS to issue substantial completion even if full documentation from NVEnergy is lagging. |
NVEnergy's initial estimated cost was provided over 6 months ago. NPS has asked for an updated estimate but has not received a response, so please assume their fee will be $200,000 based on their initial estimate for bidding purposes which included costs for construction, removals, inspection & scheduling, design & coordination, easements & permitting, contracts & asset management and their taxes and contigency. NPS acknowledges this will likely change and equitable adjustment would be reasonable with appropriate documentation (NVEnergy invoicing).
The engineer of record, Stanley-DOWL signed the original design initiation agreement and has been coordinating the design since July 2024. The project team is in the process of transferring responsibility to NPS through an "assignment and assumption agreement" so that NPS can sign the design approval agreement as the design has been completed in order to initiate the lands review process. NPS plans to go through a similar process upon award to transfer responsibility for coordination and payment to the contractor.
Yes, as noted on Sheet E3, Key Note 3 "Coordinate and schedule removal of utility transformers with CO and utility."
| Specifications SECTION 01 27 00 – DEFINITION OF CONTRACT LINE ITEMS, 3.1 E.1. states, “NV Energy to provide the estimated costs of these services” | ||
| In our experience, NV Energy gives an estimated cost, but after construction sends a bill that is almost always higher. Will NPS be making an equitable adjustment for these cost increases? Especially since they will be forecasting out? | ||
| Who will be signing the Design Initiation Agreement with NV Energy? Is the Contractor to act as a Proxy in behalf of NPS? | ||
| Has this work already gone through the Design and Estimate Phase with NV Energy for approval? | ||
| We have reached out to NV Energy several times with no response. Does the Parks Department have an Estimate they can share with us? | ||
| Does NV Energy own the existing Transformers, and will we be coordinating their removal with them? | ||
| 14 | SECTION 02 41 00 – DEMOLITION, 3.3 JOB CONDITIONS AND PROTECTION OF PROPERTY | Per the specification, dust control must be implemented at all times to prevent the spread of dust, particularly when winds exceed 10 mph and cause dust to leave the site. While general industry practice often allows for dust control measures to intensify around 10–15 mph and suspension of activities around 25+ mph sustained winds, the Contractor remains responsible for ensuring compliance with NDEP Air Pollution Control regulations and any applicable permit conditions. |
Please refer to the Dust Control Permit issued by the Clark County Department of Air Quality for specific thresholds and required responses, as these may vary depending on the activity, site conditions, and regulatory requirements. Work must be adjusted or stopped as needed to maintain compliance and avoid violations or notices from the regulatory authority.
| Dust Control: Use all means necessary to prevent the spread of dust during performance of the work; thoroughly moisten all surfaces as required to prevent dust being a nuisance to the concurrent performance of other work on the site. Wind in excess of 10 MPH causing dust to leave site will require Contractor to limit dust-causing activities. Note all work must be performed in accordance with the NDEP Air Pollution regulations and associated permit. | ||
| Standard practice is to implement dust control measures to prevent “fugitive dust” when winds are sustained around 10 – 15 mph, and to shut down excavation/dirt work activities when the wind is sustained at 25 mph+ for long periods of time. Please confirm. | ||
| 15 | Design – There is a substantial amount of design required from the Contractor. Example: the Barge, the Wave Attenuator, and the Marine Grounding. Was this project meant to be a Design-Build? | No. Typically manufacturer's of barge and wave attenuators have proprietary designs and design them specifically for site conditions. Leaving the design to the supplier/manufacturer allows for increased competition as it does not limit the contractor to a single source. |
| 16 | 8. 6. SECTION 31 23 00 – EXCAVATION AND FILL, PART 2 – PRODUCTS, 2.1 SOIL MATERIALS, B. Native Material, 1. Selected native soils excavated from the site may be utilized as backfill material for nonstructural embankments, structural fill, and general backfill areas with the approval of the Contracting Officer and meets the requirements under Import Materials. | 1) The Memorandum from DOWL describes that a large portion of the native alluvial materials are suitable for backfill provided they are processed per the stated recommendations. The suitability of the bedrock as a backfill material will be dependent on the contractors means and methods. |
2) Bedrock was encountered during the test pit exploration and is anticipated during trench excavation. Please refer to the NV Energy Standards, the Electrical Notes on Sheet C2-C4, Detail 1/C9, Detail 2/E16 and Sheets C2-C6 to estimate the cut and fill trench quantities.
3) Groundwater and soft or yielding clays were not encountered during the subsurface exploration. Widespread dewatering and fabric is not anticipated throughout the project. However, there is potential for localized areas requiring dewatering and fabric installation.
4) We are willing to accept proposals for longer open trench lengths provided that the contractor can provide a secure and safe site that prevents injury to workers and wildlife.
| Based on the Memorandum from Dowl, this is a soil Type C, can you confirm that testing performed shows that a large portion of the Native Materials are unsuitable and Fill will have to be imported for the Trench backfill and compaction? Please confirm we will be digging through bedrock and expected cut and fill quantities for the Trench. Can you also confirm the need for dewatering the Trench and the requirement of a Woven Fabric? | ||
| G. Open Trench | ||
| 1. Maximum Length: The maximum length of the open trench in the aggregate at any one location is not to exceed 200 feet. The trench is considered open until fill is completed to adjacent finish grade elevation. Testing requirements of the C900 pipe would dictate the trench remain open till the entirety of the pipe can be hydro tested with a visual inspection on all fittings, bell restraints, and thrust blocks. Please advise. Stopping Excavation every 200’ and running conduit or pipe and then backfilling with testing would be highly cost prohibitive. | ||
| 17 | 1.3 Statement of Limitations | 1) The asbestos containing gaskets will need to be abated by a licensed abatement company. A black gasket was found to be negative for asbestos and a blue-grey gasket was found to be asbestos containing. When removing the gaskets the contractor will need to determine if the gasket contains asbestos based off its color and further sampling will not be required. However, if a different gasket is found, then it will need to be tested. |
2) Yes, the contractor will be required to remove the existing contaiminated soil. The amount of contimantion found indicates that it may be able to be disposed of as non-hazardous waste. However, contaminated soil will need to be managed in conformance with federal, state, local and NPS regulations and guidelines. See Appendix C of the Hazardous Waste Assessment for an image of the contaminated area.
3) The removal of waterfowl droppings will be dependent on the contractors means and methods for the barge demolition. The contractor will be responsible for coordinating with the landfill or place of disposal to determine if waterfowl droppings are acceptable.
| Pipe gaskets at connections that are still in service or connected were not sampled. Gaskets should be verified to the two sampled gaskets in the report for determination of homogenous material. Please confirm that we will have to have this tested and that a licensed Abatement Company will have to perform the removal of “hot” materials. | ||
| Based on their other findings and reports, is the Contractor expected to perform soil removal and amending due to the “spill” of diesel fuel at the existing site? | ||
| Is the Contractor expected to perform Hazardous Waterfowl Droppings removal on the existing Barge prior to Demoing and Removing it? | ||
| 18 | The Wave Attenuator is shown as an Option on the Proposal. However, due to the weather and wave size, we would not be able to install a Barge without one, and could not provide a warranty for the equipment in water. Please advise. | Due to fund sources for this project, the wave attenuator was required to be solicited as an option. The risk to the investment is understood by NPS budget and we anticipate award of this option. It is acceptable to note in proposals that warranty of part of installed work (any damage that could be attributed to the lack of a wave attenuator) is contingent upon receipt of the award for the wave attenuator option . |
| 19 | Could we get a 30-day extension to the Bid Due Date? The answers to the above questions will materially change the budget for this Project and our Bid. We would not be able to effectively price these items in the short period of time from when these get answered and we need additional time to review the newly provided Specifications. | The bid due date is extended to June 23th, 2025 at 14:00 MT via Amendment 5. |
| 20 | The solicitation states, “complete and submit the attached “General References,” form. Information will be used in determining Responsibility pursuant to FAR 9.103. | The General Referrences Sheet is added to the solicitaiton as apart of Amendment 4. |
| Q: A form titled “General References” was not provided in the solicitation packet. Will the Government issue the form and/or let the Offeror know what information is required to determine responsibility? | |||
| 21 | Due to the sensitive nature of the area, are we required to have a cultural monitor during construction? | As the sensitive area is being avoided, a cultural resource monitor is not required. Park cultural resources may check in on the project as work advances. Inadvertent discoveries shall be in accordance with 01 35 13.22 3.2.A If contractor discovers archaeological resources or human remains, stop work immediately within 100’ of the discovery and report the discovery to the Contracting Officer. Work may continue outside the 100’ buffer until Cultural Resource staff evaluate the discovery. | |
| 22 | We see the requirement for a full time QC, is the Superintendent able to also cover the role of Site Safety Officer? | The superintendent may not serve in any other key personnel position. | Amendment 5, Posted 5.27.25 |
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