B08_A6_Solicitation_Questions_and_Answers_Log_Round_2_0004.pdf

Number Contractor Date Received Question Date Sent to COR Answer Date Answered

1 Keller North America, Inc. 5/4/2023

According to Specs Section 31 56 23 Par. 1.04 Job Site conditions, there is a Geotechnical Data report, prepared by GEI Consultants Inc. dated December 2021. Is available? 5/8/2023 Geotechnical Data Report added to solicitation via Amendment 0002 5/10/2023

2 Tribal 1 5/10/2023

Plese confirm that subcontrators meeting the qulaification requirements for the specialty work such as RCC, DMM, SCB is acceptable to meet the requiements of the specifications. We assume this is the case since the priject is an ISBEE set aside and there are no knows ISBEE prime contractors taht would meet all of these strict requirements. 5/10/2023

Confirmed. Yes, the prime may use the subcontractors experience as their own overall experience. 5/10/2023

3 T1/MW 5/17/2023

Can AutoCAD drawings be provided ahead of bid time to allow for analysis of Earthwork? 5/25/2023

AutoCAD drawings will be provided after award. The quantities in the bid schedule shall be the basis of bid. 5/17/2023

4 T1/MW 5/17/2023

As-Built data of the existing spillway are difficult to decipher due to many of the critical dimensions being labeled as “Varies”. Can the BIA provide the typical wall thickness at the bottom and top as well as the spillway slab thickness at a minimum to level the bidding field? 5/25/2023 See Amendment 3 for better quality existing condition drawings. 6/5/2023

5 T1/MW 5/17/2023

Per section L.6.2.1.2 a project manager is listed as “Key Personnel”, but in M.2.3.4.2 they are not listed. Please confirm if a Project Manager needs to be submitted for this project? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

6 T1/MW 5/17/2023

Can you please confirm that White Clay Creek does not have a minimum stream flow that must be maintained during the course of construction? If so please provide details as to what is required. 5/25/2023 Following up on this question.

7 T1/MW 5/17/2023

During phase 1 & 2 the diversion will utilize the existing outlet works. Please confirm that the slide gates in both the outlet works intake and the outlet works control house are both operable and seal? Also please confirm that during the installation of the temporary diversion that these gates can be closed and the reservoir allowed to impound a minimum amount of water while the installation occurs? 5/25/2023

The gate at the intake structure no longer exists. The gate at the control house was functional as of May 2023 with some noted leakage.

See specification 01 51 38 Diversion and Care of Water for additional requirements. Operations of the gate can be coordinated with BIA Safety of Dams personnel. 6/5/2023

8 T1/MW 5/17/2023

Has the existing material to be dredged inside the reservoir and in the downstream channel been tested for heavy metals and other hazardous materials? If so please confirm that no contaminated materials are present. 5/25/2023

No contamination testing of sediments has been performed nor are any known to exist. 6/5/2023

9 T1/MW 5/17/2023

Can you please confirm that no hazardous materials (asbestos, lead, coal tar, etc) are anticipated to be encountered during demolition of the spillway, control house, & outlet works? 5/25/2023

No hazardous materials are know to exist in the spillway, control house and outlet works. 6/5/2023

10 T1/MW 5/17/2023

Can you please confirm that no hazardous materials (asbestos, lead, coal tar, etc) are anticipated to be encountered during demolition of the two houses? 5/25/2023

See Specification 13 60 00 Manufactured Home Installation for relocation requirements of existing homes. 6/5/2023

11 T1/MW 5/17/2023

Construction of the Left Embankment Access Road has a unit of 1 Lump Sum. Is the earthwork for this road incidental to this item or the excavation/embankment items? How about the aggregate base? 5/25/2023

All work associated with the Left Embankment Access Road is included in the Lump Sum bid item. See Sheet EM-C-12 for additional information. 6/5/2023

12 T1/MW 5/17/2023

The area to receive “excess excavated material” on sheet G-21 is approximately 5 acres. Given a little over 90,000 CY of materials are needing to be disposed this is a very small area. Please provide an additional area where this material can be disposed of. 5/25/2023

Please review Sheets G-19 and G-21 (including notes) and specifications for additional information. 6/5/2023

13 T1/MW 5/17/2023

Please confirm the thickness of the Clay Blanket in the emergency spillway is 2’ thick? No site restoration to this area is shown in the drawings, is this area to receive topsoil and be seeded? 5/25/2023

See bid schedule for estimated quantities and limits of restoration requirements. See Specification 01 11 00 Summary of Work for additional information related to this work. 6/5/2023

14 T1/MW 5/17/2023

For the home removal and replacement items. What level of utility services are at the current houses and what will be required at the new houses? Do existing homes have wells or septic tanks that will be required to be demolished as part of the demolition? Do the new homes require wells or domestic water, septic tanks or sanitary sewer connections, etc? 5/25/2023 Answer will be finalized with Amendment 3. 6/5/2023

15 T1/MW 5/17/2023

The cement industry as a whole has transitioned away from Type I/II cement to a Type IL cement due to EPA regulations. Please confirm that Type IL cement can universally be substituted for Type I/II in the specifications? 5/25/2023

See Amendment 3 for revised. Bidders should assume Type I or I/II will be required for the DMM Shear Walls and SCB cutoff wall. 6/5/2023

Questions and Answers Log for Solicitation # 140A1623R0026 - Oglala Dam Remediation Project

16 T1/MW 5/17/2023

Is there an existing quarry that the BIA intends the contractor to utilize onsite for the production of concrete and earthwork aggregates? 5/25/2023

See Specifications 03 37 23 Roller-Compacted Concrete, 03 30 00 Cast-In-Place Concrete 03 34 13 Controlled Low Strength Material (CLSM), 32 11 23 Aggregate Base Course, and 31 23 23 Fill and Backfill for material requirements. There is no required identified source. 6/5/2023

17 T1/MW 5/17/2023

Per 01 11 00 1.01.A.17 “Removing temporary cofferdams and temporary diversion systems” is required but the drawings state that the Cofferdam required for Phase 3 to be “removed or abandon-in-place”. Please confirm upstream cofferdam can be abandoned in place. 5/25/2023

Upstream cofferdam can be abandoned in place, see Sheet G-21 for additional information, specifically fill limitations within the wetted perimeter of the reservoir. 6/5/2023

18 T1/MW 5/17/2023

Is there any upstream flow information available that would aid in the development of cofferdam designs that can be provided? 5/25/2023

See Specification 01 51 38 Diversion and Care of Water for cofferdam design requirements. 6/5/2023

19 T1/MW 5/17/2023

Per Section 01 20 00 1.15.B has a table of measurement & payment items for the project and includes items 5A-5C, the bid form only has 5A & 5B. Please confirm the items “Subgrade Preparation – Slush Grout” should be removed from the table to match the bid form. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

20 T1/MW 5/17/2023

Per Section 01 20 00 1.15.B has a table of measurement & payment items for the project. There is a discrepancy between the bid form and this measurement and payment table for item #19. Please confirm if the CVC Facing concrete is to be paid for by items 15-19 or if it is to be included in item 19? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

21 T1/MW 5/17/2023

Please confirm what mix design assumptions were made in development of the bid form and the quantities associated with items 16-18. Is there a baseline mix that the government has developed for use on this project? 5/25/2023 See Amendment 3 for information only. 6/5/2023

22 T1/MW 5/17/2023

If the contractor elects to utilize GGBFS rather than Fly Ash please confirm that adjustments in items 16-17 will be compensated? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

23 ASI 5/19/2023

The 450 Day period of Performance listed in Amendment #0002 with dates of 8/7/2023 to 10/30/2024 seems to be very aggressive. If winter shutdowns are required, this only allows one construction season to perform all work on the project. Consider a longer period of performance that would allow a 2nd construction season (accounting for winter shutdown). 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

24 ASI 5/19/2023

Solicitation Section M.2.3.4.2 Key Personnel requires experience by the proposed team in successful execution of the following project aspects within the past 5 years. Please consider increasing the experience time limit for all Key Personnel from “within the past 5 years” to “within the past 10 years”. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

25 ASI 5/19/2023

The Roller Compacted Concrete Foreman shall have installed no less than 50,000 CY of RCC within the past 5 years. This project involves only 17,000 CY of RCC. Please consider either reducing this requirement to match the project size and increasing the time limit from “within the past 5 years” to “within the past 10 years”. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

26 ASI 5/19/2023

Spec 03 37 23 Section 1.04 Submittals A.3.c. requires Submittal of the NRMCA Certifications and calibration report before trial placement. Is an MRMCA Certification required for the Plant to be utilized to produce RCC or is only calibration in accordance with NRMCA procedures required? 5/25/2023

Certification will be required per specification.

6/5/2023

27 ASI 5/19/2023

Spec 03 37 23 Section 1.04 A.4.b. requires the submission of an executed contract with an approved conveyor system supplier. Is there an “approved list” conveyor system suppliers? Are contractor-owned conveyor systems allowed or must a third party conveyor system be utilized? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

28 ASI 5/19/2023

Specification 1.03 paragraph D defines a Cold Joint as a horizontal lift area of RCC that has a LJM of 1,000-degree F-hours. Given the design requires using Retarder and specifies an initial set of 18 to 24 hours, the 1,000-degree F-hour appears overly restrictive. The RCC is very likely to reach the 1000-degree F-hour prior to initial set [presuming planned summer-time placement schedule].

Can the 1000-degree F-hour cold joint requirement be relaxed to a range of 1,500- 1,800 degree-hours to better match the initial set of 18 – 24 hours requirement?

This would appear more appropriate for this RCC application. 5/25/2023

No change to requirements. See Specification 03 27 23 Roller Compacted Concrete, Section 3.06 B.5 for additional information. 6/5/2023

29 ASI 5/19/2023

The RCC specification 03 37 23 appears to be written for a much larger RCC dam construction project. Specification 1.04 paragraphs B2 lists multiple positions to be included in the RCC Personnel Plan: including “… the CONTRACTOR's project manager; project superintendent overseeing RCC operations; RCC production supervisor(s); RCC placing supervisor(s); quality control manager(s); and the on-site person(s) who will be responsible for day-to-day set-up, maintenance, and operation of the RCC production, delivery and placing operation.” If only one RCC crew is utilized, can the same person perform multiple roles (ie. can the RCC Superintendent and RCC Placing supervisor or the RCC Superintendent and RCC Production supervisor be the same person)? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

30 ASI 5/19/2023

Spec 03 37 23 Section 1.04 Submittals B.2 RCC personnel. This section identifies numerous roles and qualifications including RCC production Supervisor and RCC Placing supervisor (two required each). The RCC Scope on this project is not large enough for the need to place RCC on multiple shifts requiring two of each position. If the RCC work will not be performed on multiple shifts, are two of each position still required? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

31 ASI 5/19/2023

Spec 03 37 23 Section 1.05 Quality Assurance A.1. requires the Mix designer to be a Licensed Professional Engineer registered in the State of South Dakota with a minimum of 5 years of experience in the design of RCC Mixes for RCC Construction projects with a minimum of 50,000 CY of RCC placed for each project. Please consider accepting Licensed Professional Engineers with Licensure in states other than South Dakota as the mix design process is typically performed in a laboratory and may be performed outside of South Dakota. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

32 ASI 5/19/2023

Spec 03 37 23 Section 2.02 RCC Mixture paragraph D requires a Vebe time of 9 +/- 3 seconds. This Vebe time is not conducive to placing multiple lifts per shift when haul vehicle placement is used to move RCC to the point of placement on the RCC lift as allowed in the RCC specification. Please consider increasing the range of Vebe to 12 +/- 3 seconds? 5/25/2023 No change to requirements. 6/5/2023

33 ASI 5/19/2023

Spec 03 37 23 Section 3.03 4.b. Cold Joints within Lift: Whenever it is necessary to discontinue lift placement and produce a cold joint, it shall be located at least 30 feet from the location of other cold joints that may have previously occurred in the same direction in any of the previous 10 layers. Is this section referring to a vertical joint in the middle of a lift as opposed to the horizontal lift surface that may exceed the 1000 deg-F-hr limit and be classified as a Cold Horizontal Lift Joint? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

34 ASI 5/19/2023

Spec 03 37 23 Section 3.06 E.2.b requires Vertical Contraction Joints to be formed using Galvanized Steel sheet metal minimum 14-gauge thickness with Plastic Sheeting or woven Geotextile. Please confirm if the 14-gauge Galvanized Steel Sheet is required to remain or if the steel sheet can be removed after driving the Plastic Sheeting or woven Geotextile in place. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

35 ASI 5/19/2023

Spec 03 37 23 section 3.10 E.5 requires extraction of a 6-inch diameter core from the entire height of the RCC Dam. Please confirm if the 6-inch diameter refers to the final diameter of the RCC core extracted or the diameter of the core drill hole. 5/25/2023

See Amendment 3 for revised requirement.

6/5/2023

36 ASI 5/19/2023

Spec 03 37 23 Section 2.02 G requires two horizontal samples by sawcut methods to be taken from the test section. Please provide dimensions of the horizontal sections to be cut from the RCC. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

37 ASI 5/19/2023

Bid Items 16, 17, and 18 Item Supplies or Services states the items are for Cement, Fly Ash and Admixtures for RCC and CVC Facing. Item 19 Service Spillway Conventional Concrete description states that item 19 is for furnishing and placing reinforced Class C, D and RCC Facing Concrete. It also states that it Includes all concrete materials and admixtures. Are the Cement, Fly Ash and Admixture for the Class B RCC Facing Concrete paid separately under items 16, 17 and 18 or are they to be included in item 19 for the Service Spillway Conventional Concrete. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

38 ASI 5/19/2023

Spec 03 30 00 Section 1.03 B. Mass Concrete - Is the Class B CVC Facing Concrete considered to be Mass Concrete even though it’s placed in multiple 12-inch thick layers? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

39 ASI 5/19/2023

Spec 03 30 00 Section 1.04 A.7. Batch Plant Layout Drawing – The spec requires the submission of drawings showing the general features of CONTRACTOR’s aggregate processing plant; aggregate transporting; storage and reclaiming facilities; aggregate rinsing and dewatering plant; coarse aggregate rescreening plant; … The drawings shall appropriately show the capacity of each major feature of the plant including the rated capacity of the aggregate production plant in tons (2000 lbs) per hour of fine and coarse aggregates, rated capacity of the aggregate transporting, storage and reclaiming facilities. If aggregate processing is not to be performed onsite, is this required? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

40 ASI 5/19/2023

Spec 03 30 00 Section 1.04 A.10. Thermal Control Plan – Is a thermal control plan required for the RCC/CVC Facing portion of the spillway. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

41 ASI 5/19/2023

Spec 03 30 00 Section 10.5 E.7 provides Tolerances for Control Structure & Chute Concrete Surfaces subject to High Velocity Water Flow. Does this section of the specification apply to the Service Spillway? If so, the 1/8” tolerance on exposed surfaces seems to be excessive. Please consider a greater allowable tolerance for the Service Spillway exposed surfaces. 5/25/2023 No change. 6/5/2023

42 ASI 5/19/2023

Spec 03 30 00 Section 2.02 C.1. requires Preliminary Mixture-Proportioning Studies at least nine months in advance of the time when placing of concrete is expected to begin. Based on the 450 day Period of Performance the 9-month advanced mix testing may not allow sufficient time to complete the project. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

43 ASI 5/19/2023

Does the lift surface of the Class B CVC Facing Concrete get prepared in accordance with the RCC spec 03 37 23 section 3.06 B as either a hot or cold horizontal joint or does it get prepared in accordance with the Concrete Specification 03 30 00 section 3.01 5.a as a construction joint. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

44 ASI 5/19/2023

Spec 03 30 00 sections 3.02, 3.04. This specification requires a central-mix batch plant equipped with dual-drums, a rescreening plant and a washing plant. This specification appears to be written for a much larger dam or lock project. Please be advised that to satisfy this requirement the Contractor will have to install a batch plant with a capital cost in excess of $5 million to produce less that 10,000 CY of CVC. None of the commercial ready-mix plants within the region satisfy this requirement Please consider revising the specification to allow either commercial ready mix, or a standard portable batch-plant on-site. 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

45 ASI 5/19/2023

Spec 03 30 00 section 3.02 A.1 requires the concrete batch plant to be equipped with dual drums. This seems excessive for the size of the project. If contractor can demonstrate that a single drum mixer will satisfy its production requirements will a single-drum be approved? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

46 ASI 5/19/2023

Spec 03 30 00 section 3.04 2.j requires a Rescreening Plant - A rescreening plant shall be located, arranged, and operated in a manner that all coarse aggregate will be routed through the plant and that its operation will ensure delivery to the mixers of graded coarse aggregate free from excessive variation and conforming to the size groups and grading of Paragraph 2.01D AGGREGATES and with moisture content conforming to the provisions of Paragraph 302A.4.d MOISTURE CONTENT. Is a Rescreening plant required? 5/25/2023 Answer will be finalized with Amendment 3. No Change. 6/5/2023

47 ASI 5/19/2023

Spec 03 30 00 section 3.04 2.j requires a Washing Plant - All coarse aggregates shall be washed immediately prior to entering the rescreening plant. Is a Washing Plant required? 5/25/2023 Answer will be finalized with Amendment 3. No Change. 6/5/2023

48 ASI 5/19/2023

Spec 03 30 00 Section 3.08 C requires the temperature of the concrete when deposited in the forms during hot weather shall not exceed 70 degrees F or temperature required by CONTRACTOR Thermal Control Plan. Does the Class B CVC Facing Concrete require a thermal control plan or the 70-degree temperature requirement? 5/25/2023 See Amendment 3 for revised requirement. 6/5/2023

49 Komada 6/2/2023

Past Performance: The proposing company's past performace and successful completion of similar size & scope dams, levees and heavy civil construction projects should be considered when evaluating technical proposals. Recommend requirement to include 3 past projects in technical proposal of $20M or greater in value. 6/2/2023 See Section M for proposal requirements. 6/14/2023

50 Komada 6/2/2023 Has an adaquate water source been idetified for the project? 6/2/2023 See Specification 01 50 00 for sources. 6/14/2023

51 Komada 6/2/2023 If contractor puts a temporary well in for water is it required to be permitted? 6/2/2023 See 01 50 00 Section 1.05 B for contacts regarding tribal water wells. 6/14/2023

52 Komada 6/2/2023 Are there any fees associated with the well installation or water usage? 6/2/2023 See 01 50 00 Section 1.05 B for contacts regarding tribal water wells. 6/14/2023

53 Komada 6/2/2023

Superintendent qualifications of the prime contrator for RCC experience is limiting. This is specialized experience that resides with the RCC sub and foreman resume. Request Super experience on dams, levees and heavy civil projects. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

54 Komada 6/2/2023

Quality Control Manager qualifications of the prime contrator for RCC experience is limiting. This is specialized experience that resides with the RCC sub and foreman resume. Request Super experience on dams, levees and heavy civil projects. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

55 Komada 6/2/2023 Are there any tax exemptions for this project? 6/2/2023 Contractor is responsible for compying with all state, federal, and tribal tax law. 6/14/2023

56 Komada 6/2/2023

Preliminary search indicates several taxes will be imposed on the project if not exempt, to include: State Sales and Use Tax, Contractor Excise Tax, TERO fee and EPA fee. Please confirm. 6/2/2023

Contractor is responsible for compying with all state, federal, and tribal tax law. 6/14/2023

57 Komada 6/2/2023 There is no place on pricing sheet to account for additional taxes other than TERO. Where should those items go? 6/2/2023

Additional lines on the pricing sheet may be added to include all pricing required for the project. 6/14/2023

58 Keller 6/2/2023 Will the subcontractors be subjected to the Tribal License Tax? Or just the Prime? 6/2/2023 All subcontractors will be subject to Tribal License Tax. 6/14/2023

59 Keller 6/2/2023 Will the subcontractors be subjected to the (TERO) Tribal Employment Rights Ordinance fee? Or just the Prime? 6/2/2023

See Amendment 4 for TERO contact. Contract TERO directly for requirements. 6/14/2023

60 Keller 6/2/2023 Will Subs be responsible for hiring local tribal members? 6/2/2023 All subcontractors will be responsible for meeting requirements for local tribal hires. Contact TERO for requirements. 6/14/2023

61 Keller 6/2/2023 Will subs be responsible for providing a small business plan/Indian Tribal utilization plan? 6/2/2023

Contact TERO for hiring requirements. No small business subcontracting requirement for this project. 6/14/2023

62 Keller 6/2/2023

Project Permits:

a. Are there any work Permits necessary to perform work on tribal land? If yes, who is the responsible party? 6/2/2023 Contact TERO for permitting requirements. 6/14/2023

63 Keller 6/2/2023 Are there any Tribal laws for Air/noise Pollution? 6/2/2023

No known laws regarding air or noise pollution on the Pine Ridge Reservation. Contractor responsible for complying with local requirements. 6/14/2023

64 Keller 6/2/2023 Probability of discovering historical or archaeological evidence? 6/2/2023 No significant historical and archeological sites are known to exist within the limits of disturbance. 6/14/2023

65 Keller 6/2/2023 Any requirements above prevailing wages set on the RFP? 6/2/2023 No additional requirements relating to wage rates. 6/14/2023

66 Conc Sub 6/2/2023 Can the CVC be broken down to its own category along with the cement, pozzolan/fly ash, and amixture for it as separate items? 6/2/2023 See Amendment 3 for revised requirement. 6/14/2023

67 Conc Sub 6/2/2023 What is the target compressive strength for the CVC Facing? 6/2/2023 See Section 03 30 00 Section 2.02 B, Class B. 6/14/2023 68 Conc Sub 6/2/2023 Is there access to water at plant staging area on G-11? 6/2/2023 See 01 50 00 Section 1.05 B for known potential water sources. 6/14/2023

69 ASI 6/2/2023

Specification 03 30 00 Section 2.01 B requires Blended Hyraulic Cement meeting ASTM C595 to have a maximum Na2O 0.60% and Maximum Heat of Hydration of 70 cal/g. It appears that cement sources within a reasonable distance to the project site are limited and may only be able to provide a type IL cement. Is a standard Type IL Cement meeting ASTM C595 acceptable to use for RCC and CVC even if it fails to meet the maximum requirements specified for Na2O and Heat of Hydration? 6/2/2023

See amendment 4 for revised requirement for heat of hydration, Na2O requirement remains unchanged and verified to be available from local supplier. 6/14/2023

70 ASI 6/2/2023

Followup to Q-41 Does the Tolerance requirement in Spec 03 30 00 Section 10.5 E.7 for Tolerances for Conctrol structure and Chute Concrete Surfaces suject to High Velocity Water Flow apply to the CVC placed in the Service Spillway? 6/2/2023 Tolerances referenced do apply to the CVC in the service spillway. 6/14/2023

71 ASI 6/2/2023

Specificaton 03 30 00 Section 2.01 C Pozzolans requires ASTM C618 Class F Flyash to meet additional requirements including a maximum percentage of Sulfer Trioxide of 4.0 and a maximum loss on ignition of 2.5 percent. It appears that locally available flyash sources meeting the requirements of ASTAM C618 Class F flyash may not meet the additional requirements in the specificaiton. Is standard Class F flyash acceptable to use for RCC and CVC even if it fails to meet the additional requirements included is sub paragraphs of Section 2.01 C? 6/2/2023 No changes, other material options are allowed by specification. 6/14/2023

72 T1/MW 5/25/2023

Is the intention to fill all “Over-Break” on the foundation with dental concrete prior to placing the mud mat? If not please confirm that the volume of RCC required to fill voids left by rock excavation will be paid at the cubic yard rate for

RCC? 6/2/2023

See Specification 31 23 13 Section 3.01 D. Excavation beyond design lines and grades will be at direction of COR. Repairs will be paid per methods as directed by COR. See schedule lines 5a, 5b, and 5c for payment descriptions. 6/14/2023

73 T1/MW 5/25/2023

How is the excavation of the overhanging wall associated with dental concrete paid, Item 5A, 5B or other? 6/2/2023 Excavation considered incidental to lines 5A and 5B. 6/14/2023

74 T1/MW 5/25/2023

Please confirm that the Left Embankment Access Road will mirror the detail provide on CS-C-03 detail for Crest Reconstruction? 6/2/2023

Road is to be contractor designed. See G-17 and G-18 for requirements. 6/14/2023

75 T1/MW 5/25/2023 Can split bulb water stops be utilized on this project? 6/2/2023 No change. See SP-S-18 for waterstop requirement. 6/14/2023

76 T1/MW 5/25/2023

Sheet CS-C-03 shows typical details for crest reconstruction after completion of the SCB Cutoff wall. The quantity of aggregate base in item 30 does not appear to cover this crest reconstruction area. How is the aggregate base for this work to be paid? 6/2/2023 See Amendment 4 for revised value. 6/14/2023

77 T1/MW 5/25/2023

Is the rip-rap, rip-rap bedding, and filter sand for the emergency spillway training berms paid for under items 25, 26, & 27? If not, how are these items paid? 6/2/2023

Confirmed rip-rap, rip-rap bedding and filter sand for the emergency spillway paid for under items 25, 26, and 27. 6/14/2023

78 T1/MW 5/25/2023

Per 03 30 00 3.02.A.1 the batch plant must be equipped with dual drums. Given the small quantity of onsite concrete production can this requirement be waived as long as the batch plant can meet the placement requirements of section 3.03?

6/2/2023 See Amendment 3 for revised requirement. 6/14/2023

79 T1/MW 5/25/2023

Per 03 30 00 3.02.A.4 the batch plant must be equipped with separate weight batches for each aggregate and cementitious powder. Given the small quantity of onsite concrete production can cumulative weight batchers be utilized as long as the batch plant can meet the placement requirements of section 3.03?

6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

80 T1/MW 5/25/2023

Given the location of the project and the highly specified requirements around mix proportioning for concrete and RCC in accordance with 03 30 00 & 03 37 23 as well as the DMM mix design per 31 56 13 we request the BIA remove the requirement for a State of South Dakota PE to stamp the final product and allow any PE approved by the BIA to complete this work? 6/2/2023 See Amendment 3 for revised requirement. 6/14/2023

81 T1/MW 5/25/2023

Per 03 30 00 1.04.A.10 a thermal control plan is required for mass concrete placements. These plans typically take months to complete and go hand in hand with the mix design study that can take upwards of 8 months to complete and typically have large costs associated due to requiring pre or post cooling of the concrete. Does the BIA anticipate that Pre and or Post cooling will be necessary for this project? 6/2/2023 See Specification 03 30 00 Section 1.04 A.10. 6/14/2023

82 T1/MW 5/25/2023

Can slump testing per 03 30 00 1.05.B.6.C be reduced to match air testing and or compression testing? 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

83 T1/MW 5/25/2023

Please confirm that the on-site lab itself will not be required to obtain ASTM C1077 certification but rather the COR will do a general inspection to ensure it is conforming to ASTM C1077? 6/2/2023 Confirmed. 6/14/2023

84 T1/MW 5/25/2023

Per 03 30 00 2.02.B Class D concrete is required to reach 4,500 PSI compressive strength in 2 days. Please confirm this requirement is 28 days? 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

85 T1/MW 5/25/2023

Per 03 30 00 2.02.C.1.a preliminary mix designs are to be submitted for each class of concrete 9 months prior to placing concrete. Is the BIA intending on providing an administrative NTP to start mix designs and submittals for the project? If not the 450 day contract time does not appear to be sufficient to complete specification requirements, and would the BIA consider extending the contract time? 6/2/2023 See Amendment 3 for revised requirement. 6/14/2023

86 T1/MW 5/25/2023

We request that the BIA extend the period of performance from 450 days to 650 days due to the remote location of the work area and the complexity of the project. 6/2/2023 See Amendment 3 for revised requirement. 6/14/2023

87 T1/MW 5/25/2023

Per Section 01 20 00 1.15.B has a table of measurement & payment items for the project. Item #30 varies from the bid form with an added sentence “Includes installation of separation geotextile. Please confirm no geotextile is to be placed below the aggregate base course. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

88 T1/MW 5/25/2023

Per Section 01 20 00 1.15.B has a table of measurement & payment items for the project. Item #36 varies from the bid form. Please confirm that item 36 is only for the construction of the two cut-off walls and that clay fill between the walls is paid by item 37? 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

89 T1/MW 5/25/2023

Per section 01 45 00 1.05.A the CQC Manager shall have 5 years experience of related CQC management experience on similar dam construction and large earthwork construction projects. Per section M.2.3.4.2 the QCM must have a much higher level of experience required that is not likely to be found with many ISBEE contractors. Can the requirements in M.2.3.4.2 be altered to match the specification requirements in 01 45 00 1.05.A?

6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

90 T1/MW 5/25/2023

Per 01 50 00 1.11.A “Improvement to Oglala Dam Road should be anticipated by contractor after construction is substantially complete.” Please confirm contractor will only be required to restore the road to pre-construction condition and that improvements of the gravel section to asphalt or concrete will not be required. 6/2/2023 Confirmed. 6/14/2023

91 T1/MW 5/25/2023

Per 01 51 38 1.01.5 it states “The Phase 3 and 4 diversion piping will remain in place for future drawdown us if needed.” Please confirm that this applies only to the new intake and 36” HDPE that connects to the intake tower and that the contractor does not need to design/install the downstream portion of the diversion to be permanently left in place for future use?

6/2/2023 Confirmed. See drawing G-14. 6/14/2023

92 T1/MW 5/25/2023

DWG G-18 has a callout for “Drainage Protection” on either side of the Northeast turnaround area. Unable to find details of this feature of work, please clarify? 6/2/2023

12" thick riprap over 6" of bedding. Costs to be incidental to construction of item 23 Embankment fill. See EM-C-01 for more information. 6/14/2023

93 T1/MW 5/25/2023

Per the excavation sections DE-C-08 – DE-C-09 the top of the Timer Pile Cutoff Wall is ~ EL 2,960 but per the Geologic Profiles the top is shown at ~ EL 2,967.

Please confirm what elevation contractor is to assume as the top of the cut-off wall? 6/2/2023 See Drawing B-02 for basis of bid. 6/14/2023

94 T1/MW 5/25/2023

Please confirm if the Timber piles are to be assumed to be treated or coated for proper disposal? 6/2/2023 Timbers assumed untreated or coated for basis of bid. 6/14/2023

95 T1/MW 5/25/2023

Sheet SP-S-19 has a detail for fence grounding, a note in the detail states to connect to dam grounding system. Was unable to locate grounding details for the dam and the specifications do not specifically state requirements. Is a grounding system required for the entire dam structure, if so please provide details?

6/2/2023 See Specification 26 05 26 for requirements. 6/14/2023

96 T1/MW 5/25/2023

DMM personnel experience identified in the Solicitation do not match the requirements in 31 56 13. Please adjust the requirements in the solicitation to match the specifications. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

97 T1/MW 5/25/2023

SCB personnel experience identified in the Solicitation do not match the requirements in 31 56 13. Please adjust the requirements in the solicitation to match the specifications. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

98 T1/MW 5/25/2023

Per section 31 56 23 3.04.A “Contractor shall complete a 100 LF SCB test section as the first 100 feet of placement placed between Sta 5+50 to 22+20. Per the drawings the SCB starts at 7+50, please confirm that the test section should be placed between 7+50 and 8+50? 6/2/2023 Location of the test section is at contractor discretion. 6/14/2023

99 T1/MW 5/25/2023

Per section 31 56 23 3.06.A additional bedrock depth verification will be required and it shown to be completed by the Engineer. Please confirm the contractor will not be completing this work and the BIA/EOR will be doing the final bedrock depth verification? 6/2/2023 Confirmed. 6/14/2023

100 T1/MW 5/25/2023

Per drawing G-08 Note # 1 the two existing drawings in the emergency spillway are to be demolished. Per 13 60 00 3.01A states the homes are to be relocated.

Please confirm which is correct? 6/2/2023 See Amendment 4 for revision. 6/14/2023

101 T1/MW 5/25/2023

Per spec 13 60 00 it makes no mention as to if the land will be provided for the home relocations or if the contractor will be required to pay for the land. Please confirm the land will be provided by the BIA and/or the Oglala Sioux Tribe?

6/2/2023 Confirmed. 6/14/2023

102 T1/MW 5/25/2023 Would the BIA consider adding a rock excavation pay item? 6/2/2023 See Geotechnical Data Report for site conditions. Rock is expected to be excavatable using conventional means. 6/14/2023

103 T1/MW 5/25/2023

We respectively request that the bid date be delayed a minimum 3 weeks. This is a highly technical remote project with a large technical proposal that is required.

To date Q&A’s have yet to be responded to with many technical questions outstanding and the site visit next week. With this request we ask that the Q&A deadline be extended another 2 weeks to allow for questions after the site visit.

6/2/2023 See Amendment 4 for revised schedule. 6/14/2023

104 T1/MW 5/25/2023

Volume II Technical Proposal has a page limit of 30 pages. Can resumes for the 6 required Key Personnel be excluded from this page count? 6/2/2023 Yes 6/14/2023

105 T1/MW 5/25/2023

Per the solicitation L.5.3 pages must be 8.5x11”. Would the BIA allow a single 11x17” page for Organization Chart? 6/2/2023 Yes 6/14/2023

106 T1/MW 6/2/2023

Per Section 01 50 00 1.05.B.4.a South Dakota Water Rights Program shall be consulted for development of wells. Since this project is on the reservation does the contractor have to permit any potential wells through the State of South Dakota? This question relates to the likely need for a well to support concrete production operations, relocation of homes, and dewatering potentially required for the site. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

107 T1/MW 6/2/2023

A well will likely be required to be developed for the batch plants onsite and will be installed in the contractor’s staging area. Please confirm that this well does not need to be abandoned when the project is complete? 6/2/2023 See 01 50 00 Section 1.05 B for contacts regarding tribal water wells. 6/14/2023

108 T1/MW 6/2/2023

If the contractor elects to pull water from either upstream of the dam or downstream of the dam for use with construction will a permit be required to be pulled? 6/2/2023 See 01 50 00 Section 1.05 B for potential water sources and contacts. 6/14/2023

109 T1/MW 6/2/2023

Does the underground electrical line at the base of the dam feed anything still in operation? Excavation operations will likely impact this line and we need to know if it must be restored for if it can be demolished as encountered.

6/2/2023 Line should be considered live and to be restored for basis of bid. 6/14/2023

110 T1/MW 6/2/2023

Can you please confirm that the design intent on the Emergency Spillway Clay Blanket is that the elevation of the spillway will not be changed and the concrete cut-off walls and clay blanket are to follow the existing contours? 6/2/2023

Spillway walls and clay blanket are intended to provide a uniform crest elevation across the emergency spillway section. 6/14/2023

111 T1/MW 6/2/2023

Section 02 41 20 identifies that Piezometers and wells are to be abandoned per this section. A table of how to abandon each is provided in 3.01.B but no wells are identified. Are there existing wells at the two homes to be relocated that must be abandoned? If so please provide depths that these are to be abandoned.

6/2/2023 Homes are on local water. No wells associated with the homes are expected to be abandoned. 6/14/2023

112 T1/MW 6/2/2023

Per 03 30 00 1.03.C.5 Class E concrete is intended for use as the 4” mud mat, however, Class F identifies that it is to be used as the Leveling Course concrete.

Please confirm where the Leveling Course concrete is to be used as it only shows up in the spec in this location and is not identified on the plans?

6/2/2023 See Amendment 4 for more information. 6/14/2023

113 T1/MW 6/2/2023

Many technical questions have yet to be answered and no addendums addressing these questions have been provided. Please extend the Q&A deadline to allow questions to continue to be submitted for 2 weeks after the receipt of the last addendum. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

114 T1/MW 6/2/2023

Section 03 30 00 3.04.E states that overlying or adjacent lifts cannot be placed sooner than 7 days after placement. Please confirm this does not apply to CVC Facing concrete. 6/2/2023

Confirmed 7 day placement delay does not apply to CVC facing. No amendment. 6/14/2023

115 T1/MW 6/2/2023

Are joints in the Emergency Spillway Cut-Off Walls going to be allowed or must they be poured continuously? 6/2/2023 Construction joint spacing to be at 100' spacing for basis of bid. 6/14/2023

116 T1/MW 6/2/2023

OW-C-01 details the steel outlet pipe. It calls for 3/8” thick steel pipe, but spec 33 05 24 calls for ¼” steel pipe. Please clarify what is the correct thickness? 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

117 T1/MW 6/2/2023

The trash rack for the diversion intake structure states that it is to be designed by the contractor, will this require a stamped design from the contractor? 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

118 T1/MW 6/2/2023

Many locations in the specifications require a South Dakota PE to design/stamp features of work such as dewatering, cofferdam, gate HPU, louvers, concrete buildings, etc. Given the remote location and specialized work associated with this project we request the requirement for this to be a South Dakota PE be removed and any Professional Engineer be accepted. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

119 T1/MW 6/2/2023

EN-C-11 shows the bollard detail with Sch 40 steel pipe but specification section 13 54 00 2.06.A states Sch 80, please confirm correct pipe thickness? 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

120 T1/MW 6/2/2023

Bid schedule & drawings for the new home replacement state they are to be located within 20 miles of the project site, however, 13 60 00 3.01.A state 30 miles from the project site. Please confirm distance from the project site.

6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

121 T1/MW 6/2/2023

Item 37 Emergency Spillway Clay Blanket Slope Protection does not mention excavation for installation of the Clay Blanket. Please confirm that excavation between the two cut-off walls that is required will be paid by item #9 Excavation.

6/2/2023 Confirmed. 6/14/2023

122 T1/MW 6/2/2023

Note 5.1 on drawing G-23 refers to specification section 03 62 00. This was not provided in the specifications, please provide if necessary. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

123 T1/MW 6/2/2023

Note 11.1 on drawing G-23 refers to specification section 03 33 00. This was not provided in specifications, please provide if necessary. 6/2/2023 See Amendment 4 for revised requirement. 6/14/2023

124 T1/MW

6/16/2023

We have contacted the TERO office and they provided us with a the compliance plan information and we have the following questions and concerns:

1) The TERO compliance plan and office indicates a TERO tax of 4% and a 1% EPA fee and a 2% Excise tax , so 7% of total contract value is required to be paid to TERO. Please confirm this is accurate with the BIA as tis will be a signifigant amount for this size of a project and its important all bidders have it correctly accounted for.

2) In addition it states that contractors must hire 95% of the skilled, semi-skilled and clerical employees must be filled with local Indians or Indian Employees.

Although it would be great if the tribe has sufficient qualified workforce to fill these roles, the nature of the work and specialty scope (RCC, DSM, Cutoff Wall, etc.) concerns us as these trades are very limited in the workforce nationally. We intend to comply with the attempt to try and fill positions if the candidates meet or exceed the requirements but also feel 95% may be impossible to obtain. The agreement does allow for the contractor to justify the rejection of employees but we see a significant challenge that could result in tension between the tribe and the contractor. We will give every candidate a fair and reasonable accommodation but just do not believe that 95% will be achievable for the scope of work related to this project.

6/16/2023

TERO is a tribal law and BIA cannot speak to the specific requirements the Tribe has. Please contact the Tribe's TERO office for their requirement.

125 T1/MW

6/16/2023

In additon to the hiring criteria above, the specifications and the RFP require specific experience requirements including supervisors and foremen with up to 15 years of experience as well as key employees who run certain pieces of specialty equipment. The 95% requirement will be impossible to achieve and be able to utilize experienced personnel to do the specialty work. Please clarify.

6/16/2023

TERO is a tribal law and BIA cannot speak to the specific requirements the Tribe has. Please contact the Tribe's TERO office for their requirement.

126 T1/MW

6/16/2023

The TERO office provided a waste permit application that will be required for the awarded contractor. We have asked if this will permit for free disposal of excess soil and rock within the reservation. The specs do state a waste area can be coordinated with the BIA. Please confirm that the intent is to waste on-site and if so what distance from the dam should the contractors assume for their bids. Also if the 1% EPA fee does not cover the on-site wasting fees please provide what that fee would be for each cubic yard of soil or rock to be wasted.

6/16/2023

See drawing G-21 designated waste area. BIA cannot speak to specific TERO requirements and recommends contacting the Tribe's TERO office for specific requirements.

127 T1/MW

6/16/2023

Please confirm that the state sales tax rate for the project is 4.5% and that BOTH Permanent Material and Consumables are taxed and the the government is not exempt for permanent material. 6/16/2023

Generally state tax does not apply on the reservations, please contact the state's tax department for requirement.

128 T1/MW

6/16/2023

The specifications state "Provide low ground-pressure (less than 250 psf) equipment to limit loads on the dam crest." This is only 1.74 psi and may be a mistake by GEI. We are working on another dam project with GEI which has nearly identical specifications, but is limited to 1,250 psf which is a much more reasonable 8.7 psi. Can you please verify this requirement? 6/16/2023 See amendment 4 for revised requirement.

129 T1/MW

6/16/2023

Amendment 3 mentioned that it included answers to the first round of questions 1-

48. We have not received any of these answers nor do they show up on Sam.Gov. We have emaild asking if this was an error and have not received a response. Due to the complexity of this project and the time needed to review all of teh answers adn communicte them to our trade partners we are requesting an addiitonl 2 weeks for proposals to be due. 6/16/2023 Proposals due date extended to July 14, 2023.

130 T1/MW

6/16/2023

Please provide a list of any Tribal recognized holidays that we should consider as non working days in addition to the current federally recognized holidays.

6/16/2023 None are known to exist.

131 ASI 6/16/2023

Solicitation Section M.2.3.4.2 Key Personnel requires experience by the proposed team in successful execution of the following project aspects within the past 5 years. As a Followup to question #24 this question was not addressed in Addendum 3, Please consider increasing the experience time limit for all Key Personnel from “within the past 5 years” to “within the past 10 years”. 6/16/2023 See amendment 4 for revised requirement.

132 ASI 6/16/2023

The Roller Compacted Concrete Foreman shall have installed no less than 50,000 CY of RCC within the past 5 years. This project involves only 17,000 CY of RCC. As a Followup to Questions #25 this question was not addressed in Addendum 3, Please consider either reducing this requirement to match the project size and increasing the time limit from “within the past 5 years” to “within the past 10 years”. 6/16/2023 See amendment 4 for revised requirement.

133 ASI 6/16/2023

The RCC specification 03 37 23 appears to be written for a much larger RCC dam construction project. Specification 1.04 paragraph B2a includes experience with supervision of RCC dams and spillways with a minimum RCC quantity of 50,000 cy for each project. Please consider experience requirement more in line with the scope of this project size. 6/16/2023 See amendment 4 for revised requirement.

134 ASI 6/16/2023

The RCC specification 03 37 23 appears to be written for a much larger RCC dam construction project. Specification 1.04 paragraph B2b includes experience within the last 15 years and each having a minimum of 50,000 cy of RCC . Please consider experience requirement more in line with the scope of this project size. 6/16/2023 See amendment 4 for revised requirement.

135 ASI 6/16/2023

Spec 03 37 23 Section 1.04 Paragraph B2c requires the RCC Quality Control Manager to be a Licensed Professional Engineer registered in the State of South Dakota. Please consider accepting Licensed Professional Engineers with Licensure in states other than South Dakota. 6/16/2023 See amendment 4 for revised requirement.

136 ASI 6/16/2023

Specification 03 30 00 Section 3.02 A 4. Amendment 3 does not appear to address questions #46 and #47 previously submitted. Subsections J and K of this specification require Re-screening and Washing of coarse aggregates for the conventional concrete immediately prior to batching. These requirements are unusual on a project of this small a magnitude (< 8,000 CY concrete), and for a structure of this configuration and purpose. Compliance with this requirement will substantially increase the cost to BIA. It is requested that these requirements be re-evaluated.” 6/16/2023 No change

137 ASI 6/16/2023

In Specification 01 20 00 measurement and payment for bid item #17 SCM for RCC in the bid item description states that it Includes AEA, WRA, HRWR, and LRWR. Should this note regarding AEA, WRA, HRWR and LRWR be for bid item #18 admixtures for RCC? 6/16/2023 No change

138 ASI 6/16/2023

Spec 03 30 00 Section 3.08 C requires the temperature of the concrete when deposited in the forms during hot weather shall not exceed 70 degrees F. If the 70-degree temperatrue requirement applies to the Class B CVC Facing, it will be placed directly adjacent to RCC with a placement temperature requirement of 85-degree F or below.