A0002_Att_4_140R4024R0020_Technical_Questions_and_Answers_0002.pdf

SOLICITATION NO. 140R4024R0020

HYRUM DAM SPILLWAY REPLACEMENT

TECHNICAL QUESTIONS AND ANSWERS

QUESTIONS FROM THE SITE VISIT HELD ON 10/9/2024, 1300 HOURS (MDT) AND

QUESTIONS SUBMITTED IN WRITING TO THE CONTRACTING OFFICER BY 10/16/2024, 1400 HOURS (MDT)

1. Are vibratory methods for aggregate pier installation not allowed?

i. No, only the specified method in 31 32 26 – Aggregate Piers.

2. In Spec 53 20 00 there’s a list of boring logs but have been unable to find them. Where can I get the boring logs?

i. The information will be provided within the 100% package provided during Stage Two of the proposal evaluation process.

3. 31 03 33 1.07 T (Page 18) Regarding the 24-hour maintenance on site while the dewatering systems are operational, are two personnel on site for safety reasons during nighttime hours required? Additionally, can this maintenance be managed through 24-hour online equipment reporting in lieu of manpower?

i. We advise that the contractor follow the lone and remote worker policy found in OSHA 191584 and RSHS’s Lone and Remote Worker guidance. We would also advise the contractor to create a fatigue management program to mitigate fatigue among employees taking part in 24-hour operations.

ii. 24-hour online equipment is not allowed in lieu of 24-hour onsite presence. It is critical that issues with dewatering be responded to in an immediate matter. Automated readings can take place around the clock, but an onsite presence is imperative.

4. 31 03 33 1.08-A (Page 18) Could you please clarify the expected duration of well-run time for Phase 2 excavation, considering that the dewatering sequencing for Phase 1 is outlined as a minimum run time of 30 days prior to excavation 4568?

i. Specification Section 31 03 33 is being fully replaced. The new version can be found as an attachment to this amendment. The information can be found within the new Section 31 03 33.

5. 31 03 33 1.08 C (Page 19) Per Specification Section 31 03 33 on page 19, which outlines the sequencing of installation, development, and operation of deep wells and well points, what is the expected duration between the installation of deep wells and the installation of well points? The sequencing calls out Install TWO, then excavate to 4568, then install Wells. Should the DW 1-22, 45 be installed after TWO, but before excavation? How long do they run prior to excavation?

i. Specification Section 31 03 33 is being fully replaced. The new version can be found as an attachment to this amendment. The information can be found within the new Section 31 03 33.

6. 31 03 33 1.98 C (Page 18) Wells to be installed turned on in 5 well increments. Based on this is the assumption the contractor to fully install header and power prior to turning on any wells? If so, header will need to be far enough away from working pad to allow drilling activities.

i. Yes, the contractor will need to fully install the header and power, or at least sufficiently to convey the water as needed while the system is being installed.

7. Please outline the proposed location for discharge of the dewatering system. Are settlement tanks required? Is treatment required prior to discharge?

i. The contractor shall determine the location of the discharge. The contractor is responsible to treat the water in order to conform with the applicable permits prior to discharging the water.

8. 31 03 33 1.10M (Page 22) Could you confirm if the primary power source from the utility company is 3-phase 480 V power, and what is the available amperage?

i. Correct, the primary power source is 3-phase 480 V power.

ii. Amperage available will depend on the size of transformer supplied by the utility, which is currently TBD. This may or may not be available for use during construction depending on power pole realignment schedule, which is also TBD.

9. 31 03 33 2.07 A (Page 25) Could you clarify the size of the cement bag referenced in the statement

"Approximately 7.5 gallons of water and 4 pounds of bentonite per sack of cement"?

i. The size of the cement bag is approximately 94 pounds and has been reflected in the new

Specification Section 31 03 33 included as an attachment to this amendment.

10. 31 03 33 2.10 F (Page 26) Can we substitute a bucket flow test on each well instead of installing flow meters, given that we will have 24-hour observation on site?

i. Flow meters are required on each well per specifications Section 31 03 33 Paragraph 2.10 found as an attachment to this amendment.

11. 31 03 33 3.03 B (Page 28) Regarding the collection and storage of material collected from borings, will continuous coring be required? What are the sampling requirements, and is 100% recovery expected?

Additionally, how are samples to be stored and what is procedure for this, will samples be stored in bags or boxes?

i. As close to continuous coring, sampling, and 100% recovery should be maintained.

Samples should be stored near borings, and bags are acceptable.

12. 31 03 33 3.03 H (Page 29) Could you clarify whether we are to collect and store samples as indicated in

Note B, or should we dispose of the drill cuttings as stated in Note H? Is collection in bags acceptable?

i. Collect and store as indicated in Note B, then dispose of the drill cuttings per Note H. Holes are to be logged by the cuttings. Storage in bags is acceptable.

13. 31 03 33 3.05 C (Page 30) Is it expected that the drill rig is to set on the hole during development?

Development is to be done prior to bentonite seal. Rig casing should not be removed until bentonite is placed. Where is development water to be discharged to? Can well development water be placed on ground.

i. The development process is to be determined by the contractor. The contractor may use the drill rig during development, or some other piece of equipment. Development water is to be discharged in accordance with the permits obtained by the contractor.

14. 31 03 33 3.05 B (Page 30) Could you clarify if there is a time limit or minimum duration required for development.

i. There is no time limit or minimum duration required for development. The target NTUs/ppm are to be met.

15. 31 03 33 3.05 C Based on the government-provided design, how often should contractor expect to redevelopment or pump material accumulated in the bottom of the well?

i. Redevelopment or pumping of accumulated material dependent on field conditions and well performance. See Division 53 specification sections.

16. 13 03 33 3.05 Wells have up to 33’ of bentonite to be placed after development. Will a 1” filter fill pipe work to replace sand as it drops during development.

i. Yes.

17. 31 03 33 3.05 (Page 29) Would bentonite chips be acceptable for use during development instead of pellets?

i. Yes. Specifications do not specify between bentonite chips or pellets.

18. 31 03 33 3.07 (Page 30) In relation to the dewatering specifications, how much development time should we anticipate? Additionally, regarding the reports to the COR before completing the well, where does the step test fit in? If we are required to test each well, how much time should we allocate for this process?

i. Development time is dependent on method of developing and geologic conditions encountered. Timing of development and step tests is dependent on the construction schedule.

19. 31 03 33 3.11 (Page 33) What percentage of standby equipment is required to be on site during the dewatering operation period.

i. No specific percentage of standby equipment is required. The system must remain fully functional.

20. 31 03 33 2.10B (Page 25)

a. Flow range for deep wells states 1 to 100 GPM. Pumps per plans are 5 GPM. Please clarify.

i. Flow range has been deleted. Please see attached revised Specification Section 31 03 33.

b. Flow meter to measure within 2%, no meter exist that can do 1 to 100 GPM and be within 2%?

i. Requirement was deleted. Please see attached the new Specification Section 31 03

33 provided as an attachment to this amendment.

c. Wellpoints total 200 GPM, Deep wells are 45 @ 5GPM for 220 GPM, Supplemental wells of 11 @

5GPM = 55, Supplemental wellpoints 33 ,assumption of 100 GPM, unwatering 200 GPM for a total of 775 GPM. Total flow stated to be up to 2,000, can you please confirm the anticipated flow rate is under 1,000 for flowmeter sizing.

i. Total flow stated is to prepare for higher flows than anticipated during construction, especially during the initial drawdown.

d. Total discharge is to be 125% of anticipated peak flow. Please confirm peak flow for discharge and flowmeter sizing.

i. Peak flow is listed for each well. Total discharge is to be capable of 125% of peak flow to prepare for higher flows than anticipated during construction.

21. Materials onsite: Does the owner require a certain number of deep well pumps, wellpoint backup pumps left onsite at all times for replacement?

i. See the new Section 31 03 33, Paragraph 2.02 D, provided as an attachment to this amendment.

22. Section 01 14 12 Work Restrictions and Limitations, Part 1, 1.02 Work Restrictions and Limitations A.2:

Limitation 2 specifies sand drains shall be installed to the lowest elevation shown on drawings prior to excavating spillway below 4675 ft. Does the department refer to the filter sand and rip rap section in front of the cofferdam? or Does the department intend to say dewatering wells? Passive wells?

i. The intent is to refer to the passive wells shown on drawing 188-D-60204 and Section 01 14 12 will be corrected in the 100% package provided during Stage Two.

23. Section 03 30 00 Cast-in-Place Concrete, Part 3, 3.03 Concrete Test Slab and Walls H: The requested stations to be used for the test section are 3+25 to 3+35. This section includes the Pier walls but section H doesn't mention anything but the outside battered walls. Is it the intent of the department to leave out the piers in the test slab / walls?

i. The piers are not to be included in the test section. Further information will be provided at the 100% design during Stage Two.

24. Section 01 57 30 Water Pollution Control, Part 1.05 Required Permits C 1&2: This section refers to the

BOR applied permit and will transfer it to the Contractor. Please provide a copy of the terms and conditions.

i. Refer to Section 01 57 30 1.05 C 2. The terms and conditions will be provided as part of the contract award.

25. Section 01 14 12 Work Restrictions and Limitations Part 1.01, A.10, Drawing 188-D-60347 Cofferdam

Plan Profile and Section Note 3: There is a discrepancy between the specifications and drawings referenced in regard to the elevation. Please clarify 4668' or 4669'.

i. Elevation 4668 feet shown on drawing 188-D-60347 is correct and Section 01 14 12 will be corrected in the 100% package and provided during Stage Two.

26. As we are working thru the bid, we noticed that there is a drawing called out for the hoist that was not included in the drawing package, 188-D-60132. Can you provide this drawing?

i. Any references to Drawing 188-D-60132 should have referenced Drawing 188-D-60329, which is included in the package. The drawing references will be corrected in the 100% package and provided during Stage Two.

27. CLIN 00010-05 Concrete Forming

a. Spillway base slab/footing - Plans show sections vary in height from 2’ to 5’3 and will require forming. Some of these will require forming on all four sides, some will require forming on three sides, two sides, and a few only one side. Is payment for forming the base slab/footing of the spillway included in CLIN 00010-05 or in CLIN 00010-10 (RSMC)?

i. CLIN 00010-05 “Concrete Forming” is the applicable CLIN.

b. In addition, specifications require sandblasting or water blasting of previously poured concrete before pouring the next section. Is payment for this blasting included in CLIN 00010-05 or in

CLIN 00010-10?

i. Sandblasting is included in CLIN 00010-19 Joint Sealants based off Part 3 Execution

3.01 Preparation B.1.

c. Wall forming - Will the measurement and payment include forming the bulkheads which range in width from 2ft to 4 ft x the height of the wall?

i. The government does not dictate means and methods for how forms will be designed/constructed.

d. Joints - Is there a requirement that the concrete joints need to be placed vertically, or can they be constructed 90 degrees perpendicular to the matt slab?

i. Joints must be placed perpendicular to the plane of the top face of the slab.

e. Mud Slab - Plans require a 3-inch minimum thickness. There is little forming but substantial cost to pour and finish. Please clarify how this item will be measured for payment. Or can another CLIN line item be added for the mud slab?

i. CLIN 00010-05 “Concrete Forming” is the applicable CLIN.

28. CLIN 00010-07 Concrete Reinforcing

a. Epoxy coated rebar - Please verify epoxy coated rebar is not required on the spillway.

i. Epoxy rebar is not included in the spillway structure.

b. Rebar Laps - There will be a substantial amount of rebar required for laps. Will the measurement include the rebar used for the laps to meet code? Or can another CLIN line item be added for the rebar laps?

i. The governments estimates include rebar splicing in rebar quantity and within the bid schedule.

c. Support rebar in the mat slabs- To support the top mat of rebar in the spillway slabs, it will require fabricated rebar chairs, and standees. Will the measurement include the rebar used for these supports? Or can another CLIN line item be added for the rebar supports?

i. The government does not dictate means and methods for how reinforcement bars will be supported prior to concrete placement.

29. Please provide the electronic CADD files for the project.

i. CADD files are not being provided during the solicitation stage. The awardee will receive all CADD files after award.

30. Please provide the drawings referenced in Section 53 30 00 Sheets G1 - G243.

i. The drawings will be provided as part of the 100% design package provided during Stage Two.

31. B.I. 00010-25 – New Spillway Cofferdam- The spec section 31 03 23, 1.01. A.1.a ….says includes cost of furnishing and installing materials. But B.I. 00010-57 covers ‘Steel Sheet Piles’ and qty. This spec section 31 41 16 has sheet pile driving criteria . If sheet pile F & I go in item #57 , then what goes in item #2, other than maybe seailng and dewatering efforts?

i. Section 31 41 16 will be revised to include the cost of sheet pile in CLIN 00010-25. It is anticipated that CLIN 00010-57 will be removed. Revised Section B Pricing Schedule will be included in the 100% package provided during Stage Two.

32. For the purposes of bidding should all cost for the cofferdam needed to remove existing spillway go under BI 00010-25? Spec 31 03 23 , 1.01.C.1 implies that costs are incidental to “other items of work”.

(These cost are going to be similar to the new cofferdam…. other than we could supply used sheets and likely recover them)

i. Please include the cost of both cofferdams under CLIN 00010-25 New Spillway Cofferdam for now. If the government decides to separate the costs, an updated Section B Pricing Schedule will be included in the 100% Package and provided during Stage Two.

33. Spec sec 31 41 16 , 1.01.A.2 says “ No payment will be made for portions of sheet piles cut off or discarded, damaged or for extra sheets”. Dwg 60348 (pg 157 of 233) shows cutting sheets off at dirtline.

Confirm we will get paid for full height of sheet? (Item #57 implies that we would get paid due to qty but would like confirmation)

i. Payment for sheet piles will be based on the installed sheet pile length shown on drawing 188-D-60347.

34. Is there lake elevation history from the last 5 or 10 years?

i. Lake elevation history can be found on the Hyrum Dam pin from this website:

usbr.gov/uc/water/hydrodata/reservoir_data/site_map.html

ii. Additionally, please refer to Specifications section 51 00 10 – Reservoir Water Surface Elevation Data.

35. Regarding Item 00010-04 Removal and Disposal of Equipment with Coatings Containing Regulated

Metals, what equipment, components and related accessories are expected to contain regulated metals? The applicable specification section points to 51 02 82 which only references asbestos related to samples obtained from the existing concrete.

https://www.usbr.gov/uc/water/hydrodata/reservoir_data/site_map.html

i. See revised Section 51 02 82 - Part 1, Article 2.01.

36. Please clarify pipe and concrete removal limits. Sheet 188-D-60351, Note 1 Indicates: All concrete, drainpipes, drains, and float wells.

i. All concrete, drain pipes, drains, and float wells will be removed and disposed of offsite, along with the bridge and hoist enclosure, between Sta 1+07.80 and Sta. 8+67.41.

Downstream of Sta. 8+67.41, the spillway walls will be removed and taken off site while the slab will remain. All pipe, concrete, and other features removal limits will be clarified and provided with the 100% package during Stage Two.

37. The bridge and hoist enclosure will be removed between Sta. 1+07.8 and Sta. 8+75.3. Sheet 188-D-

60352 depicts a sawcut line and end of concrete removal at approximate STA 8+67.4

i. All concrete, drain pipes, drains, and float wells will be removed and disposed of offsite, along with the bridge and hoist enclosure, between Sta 1+07.80 and Sta. 8+67.41.

Downstream of Sta. 8+67.41, the spillway walls will be removed and taken off site while the slab will remain. All pipe, concrete, and other features removal limits will be clarified and

38. Can the 3" Cast Iron Drain Pipe be grout filled from the existing manhole to the concrete removal limits shown on Sheet 188-D-60352?

i. The 3” Cast Iron Drain Pipe currently connects into the rest of the drain system, which cannot be grout filled. As will be reflected in the 100% package, the 3” pipe is to be cut and capped near the connection point to the remainder of the drain system. The remaining length of the 3” pipe from the existing manhole may be grout filled as long as the end near the concrete removal limits is also capped. This will be clarified and provided with the 100% package during Stage Two.

39. Section E Section Along CL Wellsville-Eastfield Canal Siphon indicates the existing siphon is to be grouted and the existing manhole to remain. Sheet 188-D-60355 calls for CLSM in the existing manhole.

Please clarify.

i. The 4 ft high existing siphon concrete headwall and a portion of the existing manhole, approximately 8ft in vertical height, will be removed. The portion of the existing siphon and the existing manhole that is to remain are to be filled with CLSM. This will be clarified and

40. Sheet 188-D-60220 indicates the removal of an existing O&M culvert. No length, size or elevations are shown. Please clarify.

i. This will be clarified and provided with the 100% package during Stage Two.

41. Please clarify the removal limits differentiating Items 00010-15 (Concrete Removal) and 00010-6

(Existing Bridge Removal).

i. The intent is that all features, including concrete and embedded metalwork, that make up the bridge is to be part of CLIN 00010-06, while all remaining concrete that is to be removed, primarily the spillway walls and slab, would be included in CLIN 00010-15. This will be clarified and provided with the 100% package during Stage Two.

42. Specification Section 02 41 07-3.05 allows for the disposal of existing concrete features by wasting into the stilling basin and references the drawings. Please clarify the existing spillway backfill drawings on the intended location of this fill placement.

i. Specification section 02 41 07 will be updated to reflect that the existing concrete features to be removed must be wasted off site. This will be clarified and provided with the 100%

43. 05 50 00 – Pipe guards for hoist deck enclosure. 4 EA. Drawing 188-D-60325 calls out “Guard Post Type

1. See note 5” No note 5 on sheet.

i. This drawing has been updated to include reference to 40-D-60002. 40-D drawing will be included with the 100% package during Stage Two.

44. 05 50 00 – Pipe Guardrails for spillway crest. Drawing 188-D-60313 Note 4 “See 40-D-6592 for details.”

Sheet referenced not provided.

i. 40-D-6592 has been added as part of the amendment.

45. 05 50 00 – Electrical equipment supports. No details provided.

i. Details for the electrical equipment supports will be included in the final 100% package during Stage Two.

46. 07 21 20 – Polystyrene Insulation. Various drawings call out 2” polystyrene insulation. However no dimensions are provided. When scaled I came up with ~33,000 SF. Bid quantity is 6500 SF.

i. General dimensions for the 2” polystyrene insulation are included on drawing 188-D-60267.

The bid quantity of 6500 SF provided was included in error, and a quantity of approximately 30,000 SF is considered more appropriate. This value will be updated within the price schedule in the 100% package during Stage Two.

47. 03 41 33 – Pretensioned concrete Beams. Drawing 188-D-60108 Weld Tie Details. There is not count or indication of how many weld ties will be required on the drawings.

i. Weld ties locations are found on 188-D-60109 in PLAN BEAM 2-7 view.

48. 03 41 33 Prestressed Concrete beams. Drawing 188-D-60313 thru 188-D60108 Show tie rods thru the beams. There is no indication of the number or spacing of the tie rods.

i. Tie Rod location is shown on 188-D-60105 Section A view.

49. Specification Section 07 21 20 Extruded Polystyrene Rigid Foam Insulation, paragraph 1.01 A. states, “Payment: Include in the lump-sum price offered in Price Schedule A for Metal Building System.”

However, CLIN 00010-18 contains a quantity of 6,500 ft^2. Please clarify that the intent of CLIN 00010- 18 is for the insulation under the new spillway and not for the metal building.

i. CLIN 00010-18 is for the insulation under the slab and around the walls of the new spillway.

50. Specification Section 31 09 26 Measurement Points, paragraph 1.01 C. states, “1. Measurement:

Number of scribe lines installed. 2. Payment: Include in the unit price offered in Price Schedule A.” There is no specific CLIN for Spillway Scribe Lines. Please clarify what CLIN Spillway scribe lines should be priced under.

i. Spillway scribe lines will be incidental with CLIN 00010-09-Cast-In-Place Concrete. This will be clarified within Specification Section 31 09 26 as part of the 100% design package provided during Stage Two.

51. Sheet 188-D-60107 Concrete Parapet Detail refers to IDT Spec B13.1A. IDT Spec calls for Minimum embedment of 8”. What is the thickness of the Bridge deck above the precast concrete?

i. It is 5 inches.

52. Drawing 188-D-60379, The provided panel schedules are not legible. Please provide an updated drawing.

i. Please see updated Drawing 188-D-60379.

53. Specification section 03 11 10 – 3.03 - A. states “Remove forms within 24 hours after concrete has gained sufficient strength to prevent damage by form removal.” For Reinforced Structural Mass Concrete (RSMC), the forms can help with temperature control and might be beneficial to leave intact for longer than the 24 HR requirement. Please confirm that it will be acceptable to not remove the forms within 24 hours of the concrete gaining sufficient strength, if the forms are being used to control the Mass Concrete temperatures.

i. The contractor will be required to submit their temperature control plan for the RSMC. The strategies for temperature control will be evaluated when a complete plan is submitted.

54. CLIN 00010-05 – Concrete Forming has a quantity of 110,000 square feet. Does this quantity include all formed surfaces including bulkheads and blockouts? Or is this quantity meant to only cover finished surface of the spillway that are formed. If the 110,000 sf is only meant to cover finished surfaces, should all other incidental forming be priced in this CLIN?

i. This quantity does not include incidental forming.

55. On drawing 188-D-60354 the 10” pipes and the 12” pipe between stations 10+52.5 and 11+73.0 on the profile are labeled as non-perforated on the left end and Perforated on the right end on the plan. Where do the pipes transition from non-perforated to perforated?

i. This will be clarified and updated as part of the 100% package provided during Stage Two.

56. Section 31 23 51, 1.03B.1 states “Government will perform Modified Sand Castle (MSCT) testing and Mica content on Filter Sand Material.” Has the Government performed these tests on Filter Sand Material from local suppliers near the Project Site, or can proposers assume materials available in the local market will meet the requirements of the Modified Sand Castle Test?

i. Yes, the government has performed MSCT on local sources in 2018, refer to “Evaluation of Potential Filter Sand and Drain Gravel Sources for Hyrum Dam Modifications” included as an attachment to this amendment. Offerors should verify the suppliers are still available and can meet the specification requirements.

57. Specification Section 01 31 19, paragraph 1.02A. states, “The Government anticipates other contractors working in the same general site location.” Paragraph 1.02A.1. states, “includes removal of existing overhead power lines and replacement with new underground electrical conductor, as shown on drawings and described in Section 26 05 06 – Electrical Project Coordination.” Please provide Specification Section 26 05 06- Electrical Project Coordination and as the electrical relocation directly affects the new spillway construction and please provide the completion date the contractor should assume for the electrical relocation.

i. No other contractors will be working in the same area during construction. This reference will be removed at 100% design and provided during Stage Two.

58. Drawing 188-D-60186 Plan View shows a 2% slope transitioning to a 6% slope at 5+36.50 and a 6% slope transitioning to a 5:1 slope at 7+81.50. Sections W and X on Sheet 188-D-60240 shows a 2% slope between stations 4+63 to 6+34.50. Sections Z and AA on sheet 188-D-60242 show a 2% slope between stations 6+34.50 and 9+04. Please clarify which slope grade the contractor is to use – Plan view or individual sections.

i. Additional clarity will be provided including notes, callouts, and sections specifying the start and end location of each grade and grade transition in the 100% design provided

59. Sheet 188-D-60191 has a callout for “Optional Well Enclosure with Gate” in grid C-2. Please provide the details for this enclosure – fencing, dimensions, gate size, etc. Please also provide a CLIN for pricing this work.

i. The optional well enclosure was removed and will be updated in the 100% design during Stage Two.

60. Sheet 188-D-60194 shows a pad at the bottom of the Spillway Access Road. Please confirm that this pad is to be included under CLIN 00010-60. If not, please provide the details for the material types, thicknesses and grades the contractor is to use in that area and the associated CLIN.

i. This will be updated and included in the 100% design during Stage Two.

61. Specification 01 14 12, paragraph 1.02.A.9 states the Contractor is to provide access for the downstream landowner during construction. Specification 32 12 00, paragraph 1.01.B.1.a states “Landowner access road including untreated base course, compacted backfill, and CMP Arch Culverts.”

The Contractor understands maintaining temporary access during construction, but we have the following questions:

a. Please provide alignment for the final Land Owner access road as the existing route is cut-off in two locations by the new spillway.

i. It is up to the contractor to determine where it would be best to lay out the temporary and permanent access. There will be a permanent box culvert placed near the turnaround area for the spillway access road (detailed on sheet 188-D- 60194) that could be utilized as a crossing for that road and will be installed by the time the contract is awarded but isn’t shown on the existing drawing set.

b. Is the Permanent access road measured and paid under CLIN 00010-60 or is it considered incidental to the chip seal surfacing specified?

i. The permanent access road is measured and paid under CLIN 00010-60.

c. Is the temporary access road construction, including aggregate surfacing, and CMP culverts to be measured and paid for under CLIN 00010-60 or is it considered incidental to the overall project?

i. The temporary access road construction is considered incidental.

62. Plan Sheet 188-D-60194 shows a riprap ditch and a concrete ditch beside the Spillway Access Road.

The next page, 188-D-60195 has details for the riprap ditch but no details for the concrete ditch. Please provide details for the concrete ditch.

i. Details will be updated and included in the 100% design provided during Stage Two.

63. Drawing 188-D-60215 Existing Spillway – Dike Plan is referenced throughout the drawings. According to the table of contents and drawing order in the PDF, this drawing is a blank page. Please provide drawing 188-D-60215 Existing Spillway – Dike Plan.

i. Drawing 188-D-60215 Existing Spillway – Dike Plan has been included as an attachment to this amendment.

64. Sheet 188-D-60197 Final Shoreline Grading is currently a Placeholder. Please provide an updated sheet with the Final Shoreline Grading Plan.

i. Shoreline grading details will now be incorporated into both the excavation and backfill drawings as opposed to a stand alone drawing on 188-D-60197. Amended drawings will be included in the 100% design which will be provided during Stage Two.

65. Drawing 188-D-60200 Note 2 states “For notes and reference drawings, see (60199).” However, there are no notes of reference drawings provided on (60199). Please provide updated reference or provide the referenced notes and drawings.

i. Amended drawing will be included in the 100% design during Stage Two.

66. Section I on Sheet 188-D-60252 has a callout stating, “Slope varies, see Note 3”. Note 3 states “Section I and K is between a 2:1 to 4:1 transition between station 12+43.80 to 13+44.61.” Section I shows a view through Station 11+00. Please clarify if Note 3 stationing is correct or if Section I has a set slope.

i. The Note 3 stationing as shown in Sheet 188-D-60252 is incorrect. The 2:1 to 4:1 transition happens between stations 10+58.00 and 11+21.12 (captured in Drawings Section I) and between stations 12+43.80 and 13+44.61 (captured in Drawings Section K). Amended drawing will be included in the 100% design during Stage Two.

67. Plan sheet 188-D-60228, under CONCRETE OUTLINE GENERAL NOTES states, “Backfill shall not be placed against the walls until concrete has attained a compressive strength of 4,500 pounds per square inch.” Please confirm that this statement only applies to the spillway walls and does not apply to the cutoff walls underneath the spillway slabs.

i. This requirement does not apply to cutoff walls.

68. Drawing 188-D-60273 is denoted as “Half Plan - top face only”. There is no Bottom Face drawing for this Station section. Is this drawing intended to be for both the top and bottom face reinforcement, and if not, can the bottom face reinforcement drawing be provided?

i. This distinction has been eliminated. Further information will be provided in the 100% design during Stage Two.

69. Drawing 188-D-60277 calls for “(87) #11 @ 0’-6” nf”. On drawing 188-D-60278 Section H, the same bar is notated to be a “double bundle. Please confirm if these #11s are to be double or single bundle.

i. We do not see any reference to a “double bundle”. Where the drawings say “* Denotes 2 bundled bars”, the intent is that this is a single bundle of 2 bars.

70. Drawing 188-D-60277 calls for “(14) #11 @ 0’-9”” but the length of these bars is not certain. Do these bars follow the gate blockout for their length, and then become full length after the gate blockout ends?

i. The length of the bars is intended to span the full section length. Lapse splices are required around the blockouts for continuous temperature and shrinkage steel as per ACI 350.

Further information will be provided in the 100% design during Stage Two.

71. The cutoff wall detail on Plan Sheet 188-D-60250 shows a 1:1 slope on the downstream side of the cutoff wall. The downstream side of the cutoff wall will be placed on filter sand and gravel and a 1:1 slope might be difficult to attain. Will it be acceptable to overbuild the downstream side of the cutoff walls in order to flatten the slope a bit? Would a 1.5:1 slope be acceptable?

i. The drawings have been updated to include a downstream material that can withstand a 1:1 slope. Further information will be provided in the 100% design during Stage Two.

72. Section A on Sheet 188-D-60347 shows riprap and filter sand below elevation 4660’ on the upstream side of the sheet pile. This area may be under water depending on the time of year. Is it acceptable to place these materials in the wet?

i. No material shall be place in the wet. The Government accepts the risk of wave erosion on the unprotected existing grade below the riprap and filter sand that may occur from the time of sheet pile installation to when the reservoir is low enough to complete the cofferdam work.

73. The Plan View on Sheet 188-D-60268 has a callout stating, “Finished Grading, see Plan (61946)”. Please provide this plan sheet.

i. The callout reference to (61946) will be corrected to drawing 188-D-60355 in the 100% package during Stage Two. Drawing 188-D-60355 is already included within the 90% drawings attachment to the solicitation.

74. Drawing 188-D-60358, Section N shows a non-hatched material on the bottom and sides of the existing spillway, but no indication of what this material is and if it is existing or must be placed as part of this contract. Please clarify what this unknown material represents.

i. Further information will be provided at the 100% design during Stage Two.

75. Drawing 40-D-6376. Does grounding detail apply to new fencing or is grounding detail reference for existing fence?

i. Grounding detail applies to new fencing installed by contractor.

76. Drawings 188-D-60308 through 188-D-60311 show the REINFORCEMENT DESIGN – TYP. JOINT DETAILS.

Some of these joints show a “Non-contact lap splice” at a Ct.J’s. Should these “non-contact lap splices” be considered PLAIN DOWELS or REINFORCEMENT DOWELS as defined on Plan Sheet 40-D- 60003?

i. Non-contact splices will be deformed bars.

77. Sheet 188-D-60354 appears to be missing the backfill and grading details from Station 12+61.3 to where the New Spillway ties into Little Bear River. Please provide these grading details.

i. Further information will be provided at the 100% design during Stage Two.

78. Drawing 40-D-4334 and 40-D-4335 contain notes and figure callouts that are not legible. Please provide updated drawings.

i. As per request, updated drawings for 40-D-4334 and 40-D-4335 have been provided in this amendment.

79. There are numerous references to standard USBR drawings that are not included in the drawing package. Are these drawings available via a web-based portal? If not, please provide all the standard referenced drawings.

i. As per request, updated reference drawings have been provided in this amendment.

80. Specification 31 23 22, paragraph 2.01.C Bedding and Embedment ends with a colon and provides no additional information. Please provide the Bedding and Embedment requirements.

i. Requirements are as follows: “Controlled low strength materials in accordance with

Section 31 23 70 – Controlled Low Strength Materials (CLSM Maximum backfill particle size within 1 foot of the outside of pipe: 3 inches). The requirements will be updated within Specification 31 23 22 and provided as part of the 100% package during Stage Two.

81. Specification 31 23 22, paragraph 3.02.A states “Perform additional excavation in trench bottom for pipe foundations beyond what is shown on drawings and other additional excavation beyond specified lines, as directed by COR.” Will any of this additional excavation be measured and paid under CLIN 00010-40 or is this considered incidental to the pipe installation?

i. Please refer to Specification Section 31 23 30 1.01 D for additional excavation definition.

Additional excavation directed by the COR shall be paid under the respected work activities.

82. Are the cutoff walls under the Spillway Slabs considered Reinforced Structural Mass Concrete? If so, will we be required to wait 7 days to place sand and gravel filters against them?

i. Yes, cutoff walls are RSMC. All RSMC requirements apply. Further information will be provided at the 100% design during Stage Two.

83. Work Restrictions and Limitations, Section 01 14 12 Part 1, 1.02 Work Restrictions and Limitations A.6.f:

Please provide Specification Section 01 14 20 - Reservoir Operations for additional requirements and limitations.

i. Please see Specification Section 01 14 20, which has been added to the package.

84. Specifications: Please provide Specification Section 35 21 20 - Stoplog Guides

i. Specification Section 35 21 20 will be provided in the 100% design during Stage Two.

85. Specifications: Specification Section 31 23 00 - Compacting Earth Materials is provided but not listed in TOC. Please confirm proper specification to use for this project.

i. Section 31 23 00 – Compacting Earth Materials is shown on 00 01 10 – Table of Contents and is the correct specification.

86. Will the department be willing to provide all CAD files to the Project before proposal due date?

i. Please See Question 29.

87. Project Management and Coordination, Section 01 31 19, Part 1, 1.05 Project Coordination A.1.a: Pre- Construction Readiness Review Meeting is called out to be held in Cle Elum, Washington followed up by a site tour. Is the location of meeting anticipated to change to closer to project site?

i. The Pre-Construction Readiness Review Meeting will be held in Hyrum, Utah. The location will be updated and included in the 100% specifications provided during Stage Two.

88. Steel Sheet Piles, Section 31 41 16, Par 2, 2.01 Sheet Piles, A.1: Please clarify PCZ-28 should be PZC-28.

i. PZC-28 is the intended sheet pile and will be included in the 100% specifications and provided during Stage Two.

89. Project Management and Coordination, Section 01 31 19, Part 1, 1.02 Other Contracts, A.1: This section refers to Section 26 05 06 - Electrical Project Coordination. Please provide this section.

i. No other contractors will be working in the same area during construction. This reference will be removed in the 100% specifications and provided during Stage Two.

90. Is there a geotechnical report available?

i. No, geologic reports and laboratory test results are referenced in section 53 20 00 –

Geologic Investigations. Material properties for Contractor designed components are included in the relevant specification section.

91. What is the purpose of the quantities provided? Many of our take offs are very different. If we see variation should we bid the quantities on the spreadsheet?

i. You should bid the quantities on the most up to date Section B in Excel Format provided to you. The most current Section B in Excel Format is attached to the solicitation; however, please monitor each amendment as Section B in Excel Format may be revised and provided via amendment on SAM.gov.

92. Please explain the concrete quantities on CLINs 00010-09 Cast-in-place Concrete, 3,100 yd3 and 00010-10 RSMC, 16,000 yd3. We have found roughly 16,000 CY of concrete on this project. What is the CIP Concrete and what are the limits of the RSMC?

i. This information will be provided at the 100% design during Stage Two.

93. Is the quantity sheet missing an item for construction of a cofferdam for the existing spillway demolition work?

i. See Question 32.

94. Specification Section 02 41 07, Paragraph 3.05.A states "Dispose of concrete features by wasting into stilling basin in accordance with drawings, and Section 01 74 00 - Cleaning and Waste Management." Concrete disposal is not shown on the drawings or specifically mentioned in Section 01 74 00. Please confirm demoed concrete can be disposed of in the existing stilling basin and outline any specific requirements for riprap condition, outside of the 3' max size and flush cut rebar per Section 02 41 07.

i. Specification section 02 41 07 will be updated to reflect that the existing concrete features to be removed must be wasted off site. This will be clarified and provided with the 100%

95. Specification section 03 30 00, Table 03 30 00G requires a U3 (trowel) finish on the spillway slabs, Table

03 30 00A requires entrained air. Per ACI 302.1R, a trowel finish should not be used on air entrained concrete, because it increases the chances of delamination. Please confirm the information provided in the tables is what contractor should price.

i. Section 03 30 00, Table 03 30 00F and G list the specified finish and tolerance requirements.

96. Specification section 31 23 00, Table 31 23 02A - Moistening, Placing, and Compacting Earth Materials, Impervious Fill states, "Lift Thickness - Place and compact in 6-inch maximum horizontal lifts, with thickness measured prior to compaction" and "Special Compaction Requirements - Place in horizontal layers to loose thickness of 9 inches or less". Are the lift thickness requirements for these two methods accurate or are they supposed to be switched?

i. Special compaction refers to “Compaction close to structures or in spaces not accessible by large compaction equipment (e.g. rollers)” per Section 31 23 00 1.03.F. Compaction requirements are intended to be less stringent where standard compaction equipment cannot reach.

97. Drawing 188-D-60218 shows the East Field Canal Temporary Bypass. Please confirm that this work should be priced under CLIN 00010-40 Excavation.

i. This is correct.

98. Specification section 02 83 33, Paragraph 1.07A states "Coatings contain regulated metals. See Section

51 02 82 - Hazardous Materials Survey and Analytical Results." All of the information provided in this section pertains to Asbestos testing and does not confirm that coatings on the project contain regulated metals. Pages 9 through 11 in this section are blank, were they meant to contain testing of the coatings on the site?

i. There is an additional report which includes the radial gate testing and appurtenances. See revised Specification section 51 02 82, 2.01 included as an attachment to this amendment.

99. Specification Section 03 30 00 Paragraph 2.08.B provides a list of requirements for an on-site batch plant. Do these same requirements apply to an off-site batch plant?

i. Section 03 30 00 Paragraph1.06 A and 2.08 A apply to an off-site batch plan.

100. Specification section 03 30 00 Table 03 30 00A provides the requirements for different Concrete

Mixes. The slump requirement for mix 4 and 5 are 1-3-inch. This slump requirement will require that concrete be placed with a belt, or crane and bucket. If the contractor creates a mix which satisfies all other quality requirements can the slump be adjusted to make the mix pumpable?

i. Requests for Information may be submitted to ask for a proposed variance to be evaluated.

101. Specification Section 33 46 36 Paragraph 1.02.C provides standards for PE pipe based on outside

Diameter SDR, additionally this paragraph provides standards for heat fusion of pipe and fittings.

Drawing 188-D-60254 note 3 states “All pipe bends are field welded” Specification 33 46 36 Paragraph 2.01, dictates double-wall pipe and silt-tight fittings. Please clarify if dual wall bell and spigot pipe or HDPE pipe that meets ASTM 714-10 is required.

i. Information will be provided at the 100% design during Stage Two.

102. Specification Section 03 30 00 Paragraph 1.03 C defines RSMC as a placement greater than 3 feet in least direction. The spillway walls taper from 2ft at the top to 5ft at the bottom. Would the spillway walls be a RSMC placement?

i. Specifications have been updated to list which features are RSMC and which are not.

Information will be provided at the 100% design during Stage Two.

103. Specification 03 30 00 paragraph 2.04.C.3, and table 03 30 00A note 4 requires SRA for mixes 4 and

5. Has the USBOR performed any mix design testing to determine the amount of SRA needed to meet the requirement listed in 2.03.C.3, or is there an amount that contractors should assume for the purpose of developing a price?

i. Reclamation has not performed mix design testing for this project.

104. Sheet 188-D-60233 Section H shows Impervious Fill and then a blank box above it on the left-hand side of the spillway. There is an additional call out saying “Top of Impervious Fill.” Please clarify the extents of the impervious fill. Additionally, the right-hand side of the spillway shows topsoil on top of the impervious fill. Is topsoil required on top of the impervious fill on the left-hand side of the spillway?

i. These drawings have been updated. Information will be provided at the 100% design during

105. Sheet 188-D-60107 references sheet 40-D-7017, which is not provided. Please provided referenced sheet 40-D-7017.

i. 40-D-7017 has been added to the package.

106. Sheet 188-D-60189 Section A and B call out Miscellaneous Fill on the exterior of the new spillway. The section on sheets 188-D-60230 and 188-D-60234 both call out Impervious Fill outside of the new spillway. Please clarify which sections are correct.

i. Information will be corrected and provided at the 100% design during Stage Two.

107. On sheets 188-D-60238, 60240, 60242, 60246, 60249 the Excavation Limit arrows reference various locations. Please confirm all the arrows for the excavation limits are directing the contractor to the correct location.

i. Information will be corrected and provided in the 100% design during Stage Two.

108. Specification Section 35 23 50, paragraph 1.04.A.5 states, “Backup Power: A separate 30kW, 3 phase, diesel engine-generator will be provided near the spillway as backup power for the radial gates...”

Specification section 26 32 10, paragraph 2.01.D. requires a 35kW (44 kVA), minimum. Please confirm which value is correct.

i. The correct size of the backup generator is 35kW (44kVA). Section 35 23 50 will be updated at 100% design during Stage Two.

109. Specification Section 01 57 20, paragraph 1.07B. States, “Noise barriers and equipment mufflers are required”. For the purpose of providing a proposal and price does the USBOR have an indication of where noise barriers will be required.

i. Refer to Specification Section 01 57 20, 1.07 C. The contractor is required to follow noise ordinances of the county and Hyrum City. Hyrum City limits are along the north of the project boundary. The contractor shall consider areas and times where noise impacts may affect nearby property owners especially those within Hyrum City limits and utilize noise barriers and mufflers in such a way to meet city and county ordinances.

110. Specification Section 03 30 00 – 2.10 - D. States that “If on-site batch plant is used, Contractor shall perform Mixer Uniformity Testing in the presence of the COR.” This statement would imply that using an off-site ready-mix source would be acceptable. However later in this same specification section 2.08 - B.

has some very specific requirements for the “Contractor’s On-Site Batch Plant”. Please confirm if it is acceptable to use an off-site ready-mix source or if the Contractor will be required to have an on-site batch plant.

i. It is acceptable to use an off-site ready mix supplier that satisfies Section 03 30 00 Paragraph1.06 A and 2.08 A and can meet the requirements listed in Section 03 30 00 Paragraph 2.08 C-G.

111. Specification Section 03 30 00 – 2.03 - C. states, “Prior to placing spillway concrete, stockpile on site a minimum of one-half the fine aggregate and one-half the coarse aggregate needed to complete spillway construction.” Would it be acceptable to have one-half of the aggregates stockpiled at an off-site location and dedicated to the project?

i. This is dependent on where the off-site stockpile is located.

112. Specification Section 03 30 00 – 2.08 - B.5.h states, “Just prior to batching, wash coarse aggregate by pressure spraying using adequate water nozzles and vibrating screens to remove foreign materials and coatings from aggregate.” Can this finish screening be done offsite before delivery of the coarse aggregates?

i. The purpose of the finish screening is to make sure the aggregates are clean and that there will be a sufficient bond with the paste. Whether the finish screening can be done offsite is dependent on the ability to meet the described purpose.

113. Specification Section 03 30 00 – 2.08 - E. states, “Using liquid nitrogen to cool concrete is Contractor’s option with approval from COR.” Please confirm that the Contractor will be allowed to use liquid nitrogen to cool concrete.

i. Section 03 30 00 Paragraph 2.08 E states “Using liquid nitrogen to cool concrete is Contractor’s option with approval from COR.” The use of liquid nitrogen will need to be submitted for review.

114. Specification Section 02 83 33, Paragraph 1.07.A states "Coatings contain regulated metals. See Section

51 02 82 - Hazardous Materials Survey and Analytical Results." Section 51 02 82 contains testing results for asbestos in the concrete, but no additional tests/results for any coatings. Please provide applicable test results for regulated metals, or other hazardous materials, expected to be encountered in the existing facility demolition.

i. There is an additional report which includes the radial gate testing and appurtenances. See revised Specification section 51 02 82, 2.01 included as an attachment to this amendment.

115. Drawing 188-D-60248 shows only 3 cutoff walls from STA 11+25 to 12+37.50, Drawings 188-D-60228 & 188-D-60247 show 5 cutoff walls in the area. Please clarify which drawing is correct?

i. While both drawings have been updated, generally there are three cutoff walls and one wraparound cutoff wall in the stilling basin. Further information will be provided at 100%

116. Specification section 01 57 60, Paragraph 1.02.A states that the Government has performed an Environmental Assessment and may provide an EA and FONSI report upon request. Can the Government please provide a copy of these reports?

i. Yes, the Final Environmental Assessment and Finding of No significant Impact…