Bidder Inqiries_21R0004_Lewisville DSM_Spillway.pdf

10/22/21, 12:56 PM ProjNet: Logged In User https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 1/47

Controlled Unclassified Information (CUI) Only

Bid Inquiry Contractor Report All Inquiries

Project: Lewisville Dam Safety Modification, Spillway Review: LE DSM, Spillway (00001) (sorted by CommentID ) Displaying 193 inquiries.

Id Discipline Sheet Detail Spec

9395541 Design Team Leader S-631 31 68 13

Comment Classification: UNCLASSIFIED (U)

NOTE 7 on drawing S-631 appears to contradict Paragraph 1.3.3 of Section 31 68 13.

On: Aug 31 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The minimum bond zone bearing area is 146 square inches. Sheet S-631 Note 7 will be corrected. On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9396301 Civil 01 00 00 Comment Classification: Controlled Unclassified Information (CUI)

Test

On: Aug 31 2021.

Government Response. . closed by USACE On: Sep 09 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9396302 Civil 01 00 00 Comment Classification: Controlled Unclassified Information (CUI)

Test

On: Aug 31 2021.

Government Response. . closed by USACE On: Sep 09 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9398035 Contracting 1.9 Proposal Submittals Comment Classification: Controlled Unclassified Information (CUI)

Section 1.9 PROPOSAL SUBMITTALS, A.2. General Proposal Submission Requirements says "All Responses to This Announcement Shall Be Submitted Electronically." However, the SF1442 states offers shall mail 1 original and 1 copy to 819 Taylor Street (Room 2A17), Fort Worth, TX, 76102-0300. How should the contractor submittal the proposal?

On: Sep 01 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Contractor shall submit proposal in accordance with Section 00 21 00 – Instructions, Conditions, and Notifications to Offerors, Paragraph 1.9 PROPOSAL SUBMITTALS, A.2 General Proposal Submission Requirements by the specified Date and Time indicated in the SF1442 On: Oct 22 2021

Government Response. . The text below appends or clarifies ALL previous replies.

Contractor shall submit proposal in accordance with Section 00 21 00 – Instructions, Conditions, and Notifications to Offerors, Paragraph 1.9 PROPOSAL SUBMITTALS, A.2 General Proposal Submission Requirements by the specified Date and Time indicated in the SF1442 On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9398058 CAD-BIM Full Plan Set Comment Classification: Controlled Unclassified Information (CUI) https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=CommentID https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=Discipline https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=Sheet https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=Detail https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont&RequestTimeout=1000&pagStrRowSort=SpecText https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 2/47

Can USACE provide plans and surfaces in CAD format(dwg, dgn, xml, dtm)?

On: Sep 01 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Native files will be provided following award to the selected offeror. On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9398062 Civil 31 68 13 Weir Anchors - 1.3.2.f Comment Classification: Controlled Unclassified Information (CUI)

Can contractors utilize material from borrow area to construct weir anchor temporary work berm and platform?

On: Sep 01 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Per Spec 31 68 13 Para 1.3.2 f. "Temporary work berm and platform to be constructed for the placement of weir anchors is to be constructed of gravel or cohesionless material which can readily be removed if a spillway flow event were to occur". Materials from the borrow area are clay soils. Please refer to the Geotechnical Data Report (GDR) and Geotechnical Interpretive Report (GIR) for testing of materials within the borrow area. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9398080 Civil 32 11 23 Flexible Base Course Comment Classification: Controlled Unclassified Information (CUI)

How much stockpiled salvaged base at the existing staging area does USACE estimate will be available at time of award?

On: Sep 01 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

approximately 3000 CY On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9398086 Civil 31 00 00 Earthwork - 1.4.3 Comment Classification: Controlled Unclassified Information (CUI)

Can USACE provide Geotechnical Data Report and Geotechnical Interpretive Report?

On: Sep 01 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Yes. File sizes are too large for SAM. USACE is working the issue and will include them in an amendment as soon the issue is resolved. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9399485 Contracting 2. SECTION 31 68 13 Weir Anchors Comment Classification: UNCLASSIFIED (U)

Question – with regards to Regulation No. 1110-1-1807, has the Government performed a PFMA for the spillway modification drilling activities (weir anchors, apron rock dowels, and drilled shafts) and, if so, will the Government make the PFMA's recommendations available to the Contractor for reference in preparing its Drilling Program Plan(DPP)?

On: Sep 02 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Associated risks with drilling activities were evaluated in design however a formalized Potential Failure Mode Analysis (PFMA) was not developed. On: Oct 22 2021

Current Request Status: Request Closed https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 3/47

Information for this report is procurement sensitive.

9399487 Contracting 2. SECTION 31 68 13 Weir Anchors Comment Classification: UNCLASSIFIED (U)

Question – with regards to Regulation No. 1110-1-1807, For the anchor test program conducted previously on the spillway, was a DDP prepared and will the Government make the DPP available to the Contractor?

On: Sep 02 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

An example Drilling Program Plan (DPP) is included within the Geotechnical Interpretive Report (GIR). On: Oct 22

Current Request Status: Request Closed Information for this report is procurement sensitive.

9399491 Contracting SB-532 (47 of 93) Comment Classification: UNCLASSIFIED (U)

RTA PLANS Part 2, Weir Anchor Details 2, Sheet ID # SB-532 (47 of 93), Notes #6 and #18; drawings notes state, "all steel for the Contractor designed anchor head cap must be a minimum ¾" thickness."

The ¾" thickness seems excessive for an anchor cap. Please confirm that the ¾" thickness is correct.

On: Sep 02 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The verified thickness of steel for the anchor plate is 3/4" On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9399506 Contracting Sheet ID # S-631, SB-531

Comment Classification: Controlled Unclassified Information (CUI)

RTA PLANS Part 2, Sheet ID # S-631 (48 of 93), Note #7 states, "minimum under ream upper bearing area is 180 square inches.

RTA PLANS Part 1, Sheet ID # SB-531 (46 of 93), Note #10 states, "... the minimum area between the borehole diameter and underream bond zone must be greater than 146 square inches."

Please clarify minimum under ream upper bearing area.

On: Sep 02 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Note #10 of Plan Sheet SB-531 will be amended to state, "The minimum area between the bore hole diameter and underream bond zone diameter must be equal to or greater than 146 square inches." Note #7 on Sheet S-631 will be amended with the same language. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9404464 Contracting Bid Date, October 4, 2021 Comment Classification: Controlled Unclassified Information (CUI)

The requirements for the technical proposal are extensive and will require a significant level of effort to compile a proposal with all information being sought by the Government. We respectfully request the bid date be extended by 30 days.

On: Sep 07 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Due to the upcoming holiday season, we are unable to grant the full 30 days requested and still award within the 120 days for which the proposals are locked. However, due to the volume of information in the recently posted Geotechnical Data Report (GDR) and Geotechnical Interpretive Report (GIR) as part of Amendment #2, we concur https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 4/47 additional time is needed. An amendment will be issued for a one time extension of the proposal due date from 4 Oct to 26 Oct. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9405473 Contracting 5 1.2.f 03 30 00 Comment Classification: Controlled Unclassified Information (CUI)

Section 1.2.f - please confirm the concrete placed for the drilled piers is not considered "mass concrete", even though the thickness is 4-ft or greater.

On: Sep 07 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The drilled piers are not considered mass concrete and a thermal control plan for the drilling piers is not required in accordance with Paragraph 1.2.f and 3.1 of Spec 03 30 00. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9406485 Design Team Leader General

Comment Classification: Controlled Unclassified Information (CUI)

When does USACE plan to issue the geo-tech information, including anchor study report, referenced throughout the Contract Documents?

On: Sep 08 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Referenced Geotechnical Data Report and Geotechnical Interpretative Report with appendices were posted to SAM.gov on 8 Sep 2021 as Amendment 2. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9406497 Geotechnical SB-543 A4 31 68 14 Comment Classification: Controlled Unclassified Information (CUI)

Table in Paragraph 1.3.3 of Section 31 68 14 identifies mostly singular design parameters (exception with working load); however the corresponding drawing identifies two general dowel types. The drawings and specification appear in conflict with several key parameters toward design intention.

On: Sep 08 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The details outlined in Spec 31 68 14 Table 1.3.3 are accurate. Detail A4 on Sheet SB-543 will be amended to align with the requirements in Table 1.3.3. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9408413 Contracting SF1442 Box 13 Comment Classification: UNCLASSIFIED (U)

Will the Government entertain at least a 2 week extension to the proposal due date due to the extensive details required in the proposal?

On: Sep 09 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

An amendment will be issued for a one time extension of the proposal due date from 4 Oct to 26 Oct. On: Oct 22

Current Request Status: Request Closed Information for this report is procurement sensitive.

9411373 Contracting 01 00 00.00 44 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 5/47

Comment Classification: Controlled Unclassified Information (CUI)

Schedule Requirements and Restrictions, Part 1.3.1.e.4 indicates the existing apron extension slab is to remain in place during drilled pier installation to serve as a work platform. Is this a requirement, or is it optional, for the installation of the drilled piers?

On: Sep 10 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

This is a requirement. However, USACE will issue an amendment that allows the selected contractor the flexibility to remove the turndown portions of the existing apron extension slab prior to drilled pier installation. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9411375 Contracting 01 00 00.00 44 Comment Classification: Controlled Unclassified Information (CUI)

Schedule Requirements and Restrictions, Part 1.3.1.e.4 indicates the existing apron extension slab is to remain in place during drilled pier installation to serve as a work platform. Can the contractor remove the existing turndown wall system prior to installing the drilled piers? Or must the contractor drill through the existing turndown wall system?

On: Sep 10 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

USACE will issue an amendment that allows the selected contractor the flexibility to remove the turndown portions of the existing apron extension slab prior to drilled pier installation. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9412509 Contracting SECTION 31 68 13 Weir Anchors, Part 2 (Products), 2.3 Equipment

Comment Classification: Controlled Unclassified Information (CUI)

The specifications require furnishing... "certified calibration records for each set of jacking equipment". In addition to the stressing jack calibration performed with a universal testing machine (UTM), by a certified laboratory, the specification also requires a 'breakaway test' for the hydraulic jack. Please provide the ASTM, or PTI, testing criteria for the breakaway test, and an example of the certification form. What are the qualifications for the laboratory conducting the breakaway test.

On: Sep 13 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

All requirements for conducting the cylinder breakaway tests are outlined in Spec 31 68 13 Para 2.3 On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9412511 Civil SECTION 31 68 13 Weir Anchors, Part 3 (Execution), 3.1.5 Drilling in Rock

Comment Classification: Controlled Unclassified Information (CUI)

The specifications require drilling with air as the primary circulating medium; water is not allowed with the exception of encountering ground water or experiencing excessive gumming resulting in clogging. The Anchor Study Narrative Report notes several issues experienced when under-reaming the bond zone using only air to remove cuttings from the borehole. To facilitate cuttings removal from the borehole, will the government allow drilling the bond zone using a weak cement slurry in lieu of air as the primary circulation medium. It should be noted that the specification does allow grouting the bond zone with a weak cement if the bond zone is left open beyond 8 hours.

On: Sep 13 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The use of a weak cement slurry is NOT allowed during drilling of anchors. As noted in the anchor test program report, adjustments were made to accommodate the removal of cuttings while utilizing air. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9412513 Civil SECTION 31 68 13 Weir Anchors, Part 3 (Execution), 3.1.7.2 Alignment Check https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 6/47

Comment Classification: Controlled Unclassified Information (CUI)

The specifications state... 'Holes, or portions of holes, which are out of alignment must be corrected or filled with cement grout having a water-cement ratio of 0.45 or sand-cement grout, and a new hole drilled as directed by the Contracting Officer.' Please note, a 0.45 (W:C) mix ratio will result in a grout body substantially harder than the Eagle Ford Shale which will result in issues with the re-drilling to correct the borehole alignment. Recommend using a grout mix having a 24-hour compressive strength that more closely matches that of the Eagle Ford Shale.

On: Sep 13 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The specification will be amended to state "Holes, or portions of holes, which are out of alignment must be corrected in a manner approved by the contracting officer. If alignment cannot be corrected, abandon the hole by filling with cement grout having a water-cement ratio of 0.45 or sand-cement grout, and a new hole drilled as directed by the Contracting Officer. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9412978 Contracting 5 01 00 00.00 44 Comment Classification: Controlled Unclassified Information (CUI)

Section 1.3.2 provides working restrictions for certain work based on the pool level at a given time. After reviewing the historical pool elevation data, it is highly variable for timing of pool level rise as well as for duration of any event. For example, for the past 10 years, there have been 7 events that would hit action levels and impact work activity. These events have lasted anywhere from a few days up to 3 months and occur at anytime between October and August without any predictable pattern.

Please define how the Contractor will be compensated for both time and money should a high-water event occur. This is in relation not only for delay, but also any potential rework that may occur (IE removal and reinstallation of working platforms during the Weir Anchor Installation).

On: Sep 13 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Revised language in amendment 5 adds more detail on how high water/spillway flow events will be addressed. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9413183 Civil 63, SB-561 E1 01 20 00 Comment Classification: Controlled Unclassified Information (CUI)

Section 01 20 00 of the specifications, section 1.5.5 states that payment for removing and replacing the stem wall involves the the demo and replacement of monolith 6 of the right training wall, but doesn't reference monolith 7 of the left training wall.

Please confirm this pay item includes the demo and replacement of both monoliths.

On: Sep 13 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Only the stem wall on monolith 6 on the right training wall is to be demolished and replaced. A callout on Sheet SB- 561 will be added and be part of Amendment #4. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9413196 Civil 65, SB-563 A6 Comment Classification: Controlled Unclassified Information (CUI)

Please confirm that monolith 7 replacement on the Left Training wall has the same dimensions for monolith 6 on the right training wall as shown in section A6 on sheet SB-563. Monolith 7 removal/replacement is noted on sheet SB-561 but detailed dimensions are not provided.

On: Sep 13 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Only the stem wall on monolith 6 on the right training wall is to be demolished and replaced. A callout on Sheet SB- 561 will be added and be part of Amendment #4. On: Oct 22 2021 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 7/47

Information for this report is procurement sensitive.

9414356 Specifications Instructions 00 21 00 Comment Classification: Controlled Unclassified Information (CUI)

Par 1.1 states, " All anchors will be installed and tensioned before performing any demolition on apron slabs."

a. Spec section 01 00 00, "Schedule Requirements and Restrictions", par 1.3.1a, states we may demo apron slabs prior/during weir anchor work, "except the three columns of slabs near the spillway centerline."

a. Which is correct?

b. Please confirm we can also perform existing apron grinding and joint sealant removal prior/during weir anchor work.

On: Sep 14 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The narrative in Spec 00 21 00 will be amended to align with the restrictions outlined in Spec 01 00 00.00 44 Para.

1.3.1.a. This change will be part of Amendment #4. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9414359 Specifications Temp Construction 01 50 00

Comment Classification: Controlled Unclassified Information (CUI)

Par 3.4.1 states, "Portable or overhead power is acceptable for project, see Attachment B for requirements for overhead power."

Attachment B, General paragraph states the contractor shall be required to provide overhead primary power and pole supported data communication lines to the laydown area. Please confirm generator power and cellular communication is acceptable at the laydown yard.

On: Sep 14 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Concur; if the contractor elects to use temporary generators and cellular, then overhead primary is not required. On:

Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9414361 Specifications Temp Construction 01 50 00

Comment Classification: Controlled Unclassified Information (CUI)

Attachment B states, "Contractor shall include roadway light as shown on the contract drawings." Please indicate which drawing and if lighting is required if nighttime operations are not anticipated.

On: Sep 14 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Lighting zones are shown on CG-102 (page 10 of 93). Lighting will not be required if nighttime operations are not anticipated. Paragraph 2.2.2 of Specification 01 50 00 mentions that the contractor is to "provide necessary lighting, signs, barricades..." Then further in the paragraph it states that "lighting must be adequate...during night work operations." On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9414363 Specifications Temp Construction 01 50 00

Comment Classification: Controlled Unclassified Information (CUI)

Par 3.4.1 states there is water available at the meter connection shown in the plans. Please indicate where this may be found.

On: Sep 14 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The first sentence of the second paragraph will be deleted in Spec 01 50 00 Para 3.4.1. Change included in Amendment #5. On: Oct 22 2021 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 8/47

Current Request Status: Request Closed Information for this report is procurement sensitive.

9414368 Civil 8/93 G-008 Comment Classification: Controlled Unclassified Information (CUI)

Sheet 8/93, note 1 states contractor is to provide fencing around the prairie restoration area. Drawings CL-102/103, sheets 24&25/93, indicate there is existing fencing around the construction laydown yard and prairie restoration areas. Please confirm existing conditions and intentions for our contract.

On: Sep 14 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Existing fencing needs to be field verified. The fencing called out on CL-102 and CL-103 is required to be provided under this contract in accordance with the materials referred to in the specifications.

CL-102 Note 6 has been revised to clarify "EXISTING FENCING" and Note 7 has been added to CL-102. Provide Chain Link Fencing at construction laydown area in accordance with Specification 01 50 00. CL-103 NOTES 5 and 6 have been edited respectively. See amendment #004 for changes. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9414377 Specifications Solicitation Provisions 00 22 11

Comment Classification: Controlled Unclassified Information (CUI)

"Solicitation Provisions" page 18, File I: Factor I – Technical Approach Work Plans, concerning a Site Plan, states to, "Include a general description of the traffic management plan for haul routes and temporary public access along Fish Hatchery Rd." Spec 01 50 00, "Temporary Construction Facilities and Controls", par 2.2.3 last sentence states, "open access is not permitted" to Fish Hatchery Road. Please confirm what is meant by "temporary" public access.

On: Sep 14 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Temporary public access is intended to refer to non-construction vehicles with approved access to the Lewisville Aquatic Ecosystem Research Facility and Lewisville Lake Environmental Learning Areas facilities, as well as utility owners including, but not limited to, Upper Trinity Regional Water District and CoServe. General public access is not permitted on Fish Hatchery Road beyond the gated entrance south of the bridge over the spillway discharge channel.

On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9415006 Plumbing 33 46 16.2.1.1 Comment Classification: UNCLASSIFIED (U)

"Specification 33 46 16.2.1.1 requires profile wall with a smooth interior slotted HDPE Pipe meeting ASTM F2648/F2648M. The same specification requires butt fusion welded connections. The corrugated slotted double wall HDPE pipe cannot be butt-fusion welded and uses fittings designed to join this type of pipe. Was this butt-fusion requirement added by mistake? Please clarify."

On: Sep 15 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Spec 33 46 16 will be revised in amendment 5 to clarify type of pipe requirements. On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9415447 Civil 7 2.3.3 31 63 29 Comment Classification: Controlled Unclassified Information (CUI)

Section 2.3.3 requires the top 15-ft of the drilled pier to have temporary casing installed. Is the 15-ft measured from the working platform elevation or the final top of drilled pier concrete elevation? Please clarify where the 15-ft is measured from.

On: Sep 15 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 9/47

Please take note of the rest of the requirements in Paragraph 2.3.3, "As a minimum, the top 15 feet of each drilled shaft must have temporary casing and depending on the foundation conditions the entire height of the shaft may require temporary casing." The location that the 15 feet is measured from is dependent on the Contractor's means and methods to be detailed in the Contractor's Installation Plan which must be reviewed and approved by the Government.

On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9415456 Civil 9 3.2.2 31 63 29 Comment Classification: Controlled Unclassified Information (CUI)

Section 3.2.2 requires the shaft sidewalls to be overreamed. Please confirm this requirement is only necessary over lengths of shaft that did not have temporary casing installed.

On: Sep 15 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Overreaming applies to portions of the shaft below the temporary casing that experience softening as confirmed by borehole camera. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9415467 Civil 8 3.2.1.b 31 63 29 Comment Classification: Controlled Unclassified Information (CUI)

Section 3.2.1.b requires the bottom diameter of the shaft should not be less than the specified 48-in on the plans, plus 6 inches measured in any direction. Does this mean the bottom of the shaft must have a diameter of 60-in (48-in +6-in in each direction?)

Please clarify what the "plus 6-in" is in reference to.

On: Sep 15 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The tolerance for the bottom diameter of the shaft will be changed to read, "Not less than the diameter specified on plans, and no greater than the diameter specified on plans plus 6 inches." This change will be in a forthcoming amendment #4. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9417863 Civil 1 1.1 31 01 10 Comment Classification: Controlled Unclassified Information (CUI)

Section 1.1 of 31 01 10 states that "Damage to the work caused by flooding up to or below the crest of the cofferdam is the responsibility of the Contractor, and must be repaired at no cost to the Government." Section 01 00 00.00 44 section 1.3.2.2 states that "Any flood damages to the upstream work that occur after February 1 are the responsibility of the Contractor." Please confirm that any flood damage to the cofferdam that occurs between July 1 and February 1 is not the responsibility of the Contractor and any required repairs due to flooding during this period will be considered extra work.

On: Sep 16 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Please see amended language in Spec 31 01 10 and 01 00 00 . 00 44 in upcoming Amendment #5 that will provide more information on what is government and/or contractor responsibility. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9417877 Civil 1 1.3 31 01 10 Comment Classification: Controlled Unclassified Information (CUI)

This section requires cofferdam construction to begin by August 15th nd completed by February 1. Specification section 01 00

00.00 44, section 1.3.2.2 requires work to be completed between July 1 and February 1. Please confirm the intended working time for the cofferdam work.

On: Sep 16 2021.

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 10/47

Government Response. . The text below appends or clarifies ALL previous replies.

Please see amended language in Spec 31 01 10 and 01 00 00 . 00 44 in upcoming Amendment #5. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9418042 Specifications SS-431 SECTION 01 00 00.00 44, 1.3.1 Sequence of Work Restrictions Comment Classification: Controlled Unclassified Information (CUI)

This specification states, "The Contractor will only be allowed to install, test, and lock-off weir anchors on four monoliths at the same time starting at one end of the spillway and working toward the other end...." Given this restriction combined with the anchor installation and tensioning sequence shown on SS-431 and, the restriction prohibiting drilling within 50 feet of a grouted anchor until the grout has set for at least 24 hours, is proving to be inefficient for sequencing the drilling and installation activities.

Please clarify if the 4 monoliths must be adjacent and sequential, e.g, 1-2-3-4, or, can 4 monoliths be non-adjacent, e.g., 1-3-5-

7. Would the Corp consider expanding this restriction from 4 to 7 monoliths to make the work somewhat more efficient?

On: Sep 16 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Specification 01 00 00.00 44 will be revised in amendment 5 to allow for non-sequential/non-adjacent monoliths. On:

Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9419363 Civil SS-431 01 00 00.00 44 Comment Classification: Controlled Unclassified Information (CUI)

Specification 01 00 00.00 44, section 1.3.1 requires that anchors can only be installed on 4 monoliths at any one time starting on one end of the spillway working toward the other. Drawing SS-341 shows the stressing sequence for anchors per monolith. If the contractor is working on monoliths C, 1, 2 and 3 at the same time, do all anchors within monolith C have to be completed before moving to monolith 4? Or can the first 2 anchors for monolith C be completed and the contractor move to monolith 4, and returning to finish the monolith C, anchors 3 and 4 at a later time?

On: Sep 17 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

For clarification the C monolith is considered one of the four monoliths to be worked on at the same time. Applying the specification requirements to the example provided in the inquiry, the anchors in the C monolith will have to be installed, tested, and locked off before moving to Monolith #4 On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9421459 Civil 01 00 00.00 44 Comment Classification: UNCLASSIFIED (U)

Section 1.3.3c states that for the Apron Slabs Replacement Excavation that it cannot be exposed longer than 6 hours prior to placing a mudmat. Detail D8 Section Typical Replacement Slab on Sheet SB-541 Does not show a mudmat to be placed under the replaced apron slab sections. Will replaced apron slab panels need to have a mud mat placed under them if they cannot be placed back within 6 hours with the rebar and concrete as the detail depicts?

On: Sep 20 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

A mud mat must be poured within 6 hours if the full slab panel cannot be placed within that time. The mud mat must cover the over excavated subgrade from weathering and exposure to the elements. Amendment 5 will revise the language in Spec 01 00 00. 00 44 for clarity. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9421460 Civil 00 22 11 c 1 Comment Classification: UNCLASSIFIED (U)

File II: Factor VI, - Copy of Quantity Backup Sheets used by the offeror (blank copy provided in Attachment 7) https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 11/47

On: Sep 20 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

This relic reference was removed in amendment 5. On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9421463 Civil G-001 - R-718 Comment Classification: Controlled Unclassified Information (CUI)

Can we have access to the design files for a more detailed understanding of the work?

On: Sep 20 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Native files will be provided following award to the selected offeror. On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9421464 Civil 00 72 00 Comment Classification: UNCLASSIFIED (U)

Re FAR 252.204-7012 included by reference. Whenever DoD provides information to contractors, it must identify whether any of the information is Controlled Unclassified Information (CUI) via the contracting vehicle, in whole or part, and mark such documents, material, or media in accordance with this issuance." We do not see any information in the solicitation marked CUI, nor does the solicitation or the associated scope of work or specification indicate that any information to be provided by the government to the contractor and/or to be developed by the contractor will contain CUI. Please confirm that neither this solicitation nor the resultant contract will require the handling of CUI to include Covered Defense Information as defined in

DFARS 252.204-7012.

On: Sep 20 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Any items that are CUI based on current Federal requirements have been identified within the plans, specifications, and reference documents provided as part of the solicitation. Any design related files provided to the selected contractor following award will appropriately mark any items that are CUI as identified by the government at the time of delivery. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9421467 Civil 02 41 00 Comment Classification: Controlled Unclassified Information (CUI)

Page 5, Section 3.1.4.3 states that for the demo of the Wier Transition Concrete to limit the size of jack hammers or chipping hammers to a maximum of 15 lbs. For this scope of work chipping down 2 to 2.5' thick over the length and width of the Wier transition area, a 15 lbs. chipping hammer does not seem like the appropriate size of equipment. Would USACE consider allowing mechanical means of demolition such as a small hydraulic hoe ram?

On: Sep 20 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The size of jackhammers must be limited to prevent damage to the surrounding concrete of this critical area of the weir. The use of a hydraulic hoe ram will not be allowed. However forthcoming amendment 5 will allow the use of hydrodemolition and 30 pound hammers may be allowed depending on the area of the weir transition concrete proposed for use. Additionally, deeper and more frequent saw cuts are recommended to facilitate the demolition process while limiting damage to the adjacent existing concrete. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9422858 Civil SB-531 Note 1 Comment Classification: Controlled Unclassified Information (CUI)

Drawing SB-531, Note 1, indicates Directional drilling of the pilot holes. Is directional drilling required to drill the pilot holes?

https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 12/47

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Directional drilling will not be required if specified tolerances can be achieved using conventional drilling. Drawing SB- 531 Note 1 will be revised for clarity as part of Amendment #6. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9422863 Civil 31 68 13 Section 3.2.3 Comment Classification: Controlled Unclassified Information (CUI)

Spec Section 3.2.3, Cement Grouted Weir Anchors, states "all anchors must use single stage grouting to encase the anchors."

This conflicts with Notes 4 & 6 on Drawing SB-531 which references 2-stage grouting. Please clarify which method to use.

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Two stage grouting is required for the Weir Anchors. Amendment #6 will revise language in Spec 31 68 13 for consistency. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9422868 Civil SB-531 Notes 10 &

Comment Classification: Controlled Unclassified Information (CUI)

Drawing SB-531, Notes 10 & 11 indicate duplex drilling through the EFCS with casing and reference this casing to be cut 1-foot below the bottom of the recess. Please confirm that the duplex casing is to be permanently installed and left in place.

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Yes as noted at the end of Note 11 on SB 531 "the casing must remain in place." Note 11 will be clarified in amendment 6 to state that the casing being mentioned in this note is the duplex casing. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9422871 Civil SB-531 Notes 11 Comment Classification: Controlled Unclassified Information (CUI)

Drawing SB-531 Note 11, If duplex casing is to remain in-place, what location along the anchor should the bottom of the duplex casing be terminated?

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Duplex casing must be terminated 1 to 5 feet above the top of the under ream. Dwg SB-531 will be revised in amendment 6 to further clarify the termination point for the duplex casing. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9422878 Civil 31 68 13 Section 2.1.3 Comment Classification: Controlled Unclassified Information (CUI)

If Duplex casing is required to be permanently installed with the anchors, is this casing required to meet the requirements as outlined in Section 31 68 13, Part 2 – Products, 2.1.3 for Steel Pipe meeting ASTM A53/A53M, Type E or S, Grade B?

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

Duplex casing can be either steel pipe or steel tube meeting applicable ASTM requirements. Spec will be revised in amendment 6 to add more clarity on casing types in section 2.2.3. On: Oct 22 2021 https://www.projnet.org/projnet/binKornHome/index.cfm?strKornCob=BicPublicReportAll&strReportType=AllCont 13/47

Information for this report is procurement sensitive.

9422892 Civil 31 68 13 Section 2.1.3 Comment Classification: Controlled Unclassified Information (CUI)

Can the permanent duplex casing be a new, mill-secondary pipe or does it need to be "prime" pipe?

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The duplex casing must have adequate strength and durability to complete the drilling of the free length. There is no specific duplex casing requirement beyond that. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9423135 Civil 3.5.5 31 68 13 Comment Classification: Controlled Unclassified Information (CUI)

Specification 31 68 13, section 3.5.5 requires that "any anchor that fails the performance or proof test must be replaced by the Contractor at no expense to the Government." The project documents provide the anchor geotechnical design as well as the minimum installation criteria for the anchor installation. Should an anchor proof or performance test fail, and the approved installation plan was followed during installation, this would mean the geotechnical capacity of the anchor failed at no fault of the Contractor. Please confirm that given this scenario, the Contractor will be given additional compensation to remove and replace the failed anchor if directed by the Government.

On: Sep 21 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The language in the referenced specification is accurate. On: Oct 22 2021 Current Request Status: Request Closed

Information for this report is procurement sensitive.

9425049 Civil SECTION 31 68 14 Apron Rock Dowels, 3.5.1.1 Creep Comment Classification: Controlled Unclassified Information (CUI)

Rock dowels materials are specified as threaded reinforcing bars, Grade 80 ksi, conforming to the requirements of ASTM A615/A615M. A select number of rock dowels will be proof tested and monitored for creep movement. Proof testing shall be conducted in accordance with PTI DC35.1. According to PTI DC35.1, 4.2.2-Bar; material used for pre-stressing shall conform to ASTM A722/AA722M for Type II (deformed) bars, which requires bars be subjected to cold stressing to not less than 80% of the minimum ultimate strength and then stress relieved.

Specification 3.5.1.1 states that rock dowels failing the creep test will be rejected and replaced at the contractor's expense.

Should steel relaxation during proof testing cause or contribute to a failing creep test, will the Government require the rock dowels to be replaced at the contractor's expense for furnishing and installing specified materials in accordance with ASTM A615/A615M.

On: Sep 22 2021.

Government Response. . Closed by USACE upon close of bidder inquiries. On: Oct 22 2021 Government Response. . The text below appends or clarifies ALL previous replies.

The Government will evaluate the proof/creep test results during construction to evaluate acceptance. Please be aware that based on the working design loads presented in Paragraph 1.3.3 of Section 31 68 14 the maximum test loads are roughly 50% of the yield strength of the bars and not 80% of the tensile strength of the bar. On: Oct 22 2021

Current Request Status: Request Closed Information for this report is procurement sensitive.

9425054 Civil SB-543.1 Comment Classification: Controlled Unclassified Information (CUI)

The rock dowel free length is enshrouded with a polypropylene sheath extending from the top of the existing apron slab to the bottom of the transition section. It should be noted that since rock dowels are not fully bonded, and not pre-stressed/locked- off, the free length may elongate if the apron is subjected to uplift forces.

On: Sep 22 2021.

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