Questions and Answers San Joaquin River-Stockton 4 June 20.pdf

SAN JOAQUIN RIVER/STOCKTON DEEP WATER SHIP CHANNEL (DWSC)

MAINTENANCE DREDGING, SAN JOAQUIN COUNTY, CALIFORNIA

AS OF: June 4, 2020 Page 1 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005

The intent of this section is to provide questions & comments received from interested parties on the above solicitation, and our responses to those questions and comments. It is possible that the information below does not reflect 100% of the questions and responses. The questions and comments do not necessarily represent questions received from any particular contractor.

Questions and responses are provided for information only and are not made part of the solicitation. Only a formal amendment (SF30) to the solicitation changes the solicitation.

Changes to any previous responses in this document will be struck-through and new, updated responses will be provided as appropriate.

No. RFP Section Question Response 1 Section 00 21 00

1.7 Special

Instructions Pertaining to Hand‐Delivered Bids

Q1. The bid submission and bid opening references June 1, 2020. SF 1442 indicates a bid date of June 15, 2020 at 12:00 pm. Can the government please confirm the June 15th bid date?

Bid Opening Date is June 15, 2020.

Bids are due on June 15, 2020 at 12:00 pm.

2 Q2. Can the Government provide the .xyz survey data?

Yes. Please download the files from the below Hydrosurvey site:

\\coe-spna7k01sau.spn.ds.usace.army.mil\Geomatics\_Hydr ographic_Surveys\Stockton_Deep_Water_Ship_Chan nel\2020\SA_01_STK_20200212- 17_CS\Final_Products\3x3

3 Section 01 11 00 e. This project shall be dredged with a hydraulic cutterhead dredge plant(s) with a minimum 16‐in diameter pipeline and 1,800 horsepower for the main pump engine.

Per:

MEMORANDUM OF UNDERSTANDING

BETWEEN THE UNITED STATES ARMY

CORPS OF ENGINEERS, SAN FRANCISCO

DISTRICT AND THE CALIFORNIA

REGIONAL WATER QUALITY CONTROL

BOARD, CENTRAL VALLEY REGION

CONCERNING OPERATIONS AND

MAINTENANCE

DREDGING OF STOCKTON AND

SACRAMENTO DEEP WATER SHIP

CHANNELS

AS OF: June 1, 2020 Page 2 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005

4 III. SPECIFICATIONS REGARDING

DREDGING AND OPERATION OF DREDGE

MATERIAL PLACEMENT SITES

A. To the extent feasible, all Maintenance Dredging will be performed using Hydraulic Pipeline Cutterhead Dredges, as described in Chapter 2.22 of the Corps’ Engineer Manual for Engineering and Design of Dredging and Dredged Material Management dated 31 July 2015 (“Engineer Manual”). Mechanical Dredges, per Chapter 2.26 of the Engineer Manual, will be used in Maintenance Dredging only where limited access or large debris prevents use of a Hydraulic Pipeline Cutterhead Dredge. In such instances, the District will use only sealed buckets and clamshells.

1.3.1 Dredging

Per NMFS

1.3.1 Dredging

All dredging will be performed using a hydraulic cutterhead suction dredge and all dredged material and dredge slurry will be deposited at a previously authorized DMPS via pipelines.

Q3. Regarding the dredging, can the contractor utilize a mechanical clamshell dredge to load hopper barges, transport to the disposal areas, and then hydraulically unload into the disposal areas?

No, dredging is allowed using hydraulic cutterhead dredge as specified in Section 01 11 00.

AS OF: June 1, 2020 Page 3 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005

7 Section 35 20 23

Section 35 20 23

1.4 QUANTITIY OF MATERIAL

The total estimated amount of material to be removed from the specified limits, but excluding overdepth prisms, is 235,000 cubic yards. The maximum amount of allowable overdepth dredging is estimated to be 238,000 cubic yards.

The estimated quantity for bidding purposes and for application of the FAR 52.211‐18 Variation in Estimated Quantity shall be 330,100 cubic yards, which is the total quantity including paid overdepth. The quantities listed are estimates only. Within the limits of available funds, complete the work specified whether the quantities involved are greater or less than those estimated.

Q1. Can the Government clarify the overdredge volume? 330,100 cy minus 235,000 cy equals 95,100 cy, not 238,000 cy. Is the 95,100 cy the overdepth volume below the grade volume?

The total volume to be dredge for each reach as shown on the pricing schedule (00 10 00) includes the allowable paid overdepth except reach 17.

Updated bid quantities have been provided as amendment.

The revised paragraph 1.4 of Section 35 20 23 is attached to the responses.

8 Section 00 10 00

Section 00 10 00 Pricing Schedule

Plan Set (See Questions 2, 3 below):

Q2. It appears reach 9 is duplicated on the plans and reach 10 is omitted. Can the Government please clarify?

Drawing for reach 9, 10, 16, and 17 is attached.

Q3. It appears reach 17 is omitted from the plans.

Can the Government please provide the plan sheet outlining the dredging area for reach 17? Also, the specifications indicate there is no paid overdepth for reach 17. Is there a non‐pay tolerance associated with the sediment trap and will a representative cross section be provided or can it be further defined?

Drawing for reach 9, 10, 16, and 17 is attached.

Reach 17 is to be dredged to the required depth of -40 ft MLLW only.

AS OF: June 1, 2020 Page 4 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005

10 Section 35 20 23

Section 35 20 23

3.2.6.1 Method of Disposal Deposit dredged

material at Contractor‐furnished beneficial use upland placement site by pipeline, scow or barge, and using an appropriate method to unload scow/barge to place material within the upland site, or deposit dredged material at the Government‐furnished deep ocean disposal site SF‐DODS, using self‐dumping scows or barge.

3.5.1.1 Designated Dredge Material Placement

Sites

The material dredged shall be transported to and placed in the dredged material placement sites identified in the Pricing Schedule and the drawings, or to an approved Contractor furnished placement area (see paragraph 3.3.1.2 Contractor‐Furnished Dredged Material Placement Site).

3.5.6 Contractor‐Furnished Placement Area

The use of Contractor‐furnished placement areas and facilities must be approved by the Contracting Officer prior to the use of such facilities. Approval of Contractor‐furnished placement areas will be made during the contract negotiation process.

(See Questions 4, 5, 6 below):

Q4. Is the Contractor permitted to mechanically excavate the material, transport via scow, and dispose at SF‐DODS?

dredge as specified in Section 01 11 00. Material shall be placed as t government furnished site as specified in the pricing schedule (00 10 00)

Q5. Is the Contractor permitted to mechanically excavate the material, transport via scow and dispose at the Montezuma Wetlands Facility?

Q6. Is the Contractor permitted to mechanically excavate the material, transport via scow, and dispose at a different Contractor‐furnished beneficial use upland placement site, pending Govt. approval?

AS OF: June 1, 2020 Page 5 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005

Section 00 72 00 General Conditions

Section 01 11 00 Summary of Work

Section 00 72 00 General Conditions

52.211‐10 COMMENCEMENT,

PROSECUTION, AND COMPLETION OF

WORK (APR 1984)

The Contractor shall be required to (a) commence work under this contract within 5 calendar days after the date the Contractor receives the notice to proceed, (b) prosecute the work diligently, and (c) complete the entire work ready for use not later than 156 calendar days after receipt of notice to proceed. The time stated for completion shall include final cleanup of the premises. (End of clause)

Section 01 11 00 Summary of Work

1.2.2 Constraints

a. The environmental work window for the Stockton DWSC is from 1 August to 30 November. Some work such as disposal site preparations and pipe assembly can begin prior to 1 August upon Contracting Officer approval.

(See questions 7, 8 below):

Q7. The environmental work window is from August 1st to November 30th. This duration is 121 calendar days. The contract duration is 156 days and includes final clean‐up. When can the contractor expect NTP?

The contractor should expect issuance of NTP after receipt of valid performance and payment bonds.

Q8. Will demobilization activities be permissible after November 30th?

Dredging work is not permitted but demobilization is allowed after November 30th.

AS OF: June 1, 2020 Page 6 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005

MEMORANDUM OF UNDERSTANDING

BETWEEN THE UNITED STATES ARMY

CORPS OF ENGINEERS, SAN FRANCISCO

DISTRICT AND THE CALIFORNIA

REGIONAL WATER QUALITY CONTROL

BOARD, CENTRAL VALLEY REGION

CONCERNING OPERATIONS AND

MAINTENANCE DREDGING OF STOCKTON

AND SACRAMENTO DEEP WATER SHIP

CHANNELS

SECTION A: DREDGING AND DREDGE

MATERIAL PLACEMENT SITE PROVISIONS

III. SPECIFICATIONS REGARDING

DREDGING AND OPERATION OF DREDGE

MATERIAL PLACEMENT SITES

Q.

A biological survey will be conducted for giant gar ter snakes (Thamnophis gigas) by a qualified biologist prior to all construction activities, including dredge material reuse, within the Scour Pond I DMP site.

SECTION B: MONITORING AND REPORTING

PROGRAM

BIOLOGICAL SURVEY

The Scour Pond I DMP site will be surveyed for giant garter snakes (Thamnophis gigas) by a qualified biologist 24 hours prior to construction activities. Additional surveys of the project area will be conducted if a lapse in construction activity of 2 weeks or greater occurs after the initial survey is completed.

Beginning October 2 each year and continuing until placement activities are completed within the Expanded Scour Pond I DMP site, the site will be surveyed for giant garter snakes once every 14 days by a qualified biologist.

1. Is the Contractor responsible for the giant garter snake survey(s)?

The dredge contractor is not responsible for GGS surveys. The surveys will be conducted by the Fish Entrainment Monitoring contractor.

18 Can the USACE please provide any geotechnical information that is available for the dredge areas?

Please use the 1980 Feasibility Report attached to look at the boring logs.

AS OF: June 1, 2020 Page 7 of 7

QUESTIONS & RESPONSES

SOLICITATION NUMBER W912P720B0005