2023.07.14 RFI Compiled Responses.pdf
PDF 939 KB Posted
- Attached to
- Amendment 01 USDA-ARS-PWA Wolfskill Irrigation Well Phase I Winters CA Federal contract opportunity
- Solicitation number
- 12905B23R0019
About this file
This document contains responses to contractor questions regarding Solicitation Number 12905B23R0019 from the Department of Agriculture Agricultural Research Service Field Research Implementation and Information Delivery Pacific West Area. The solicitation is for the Wolfskill Irrigation Well Phase I project located in Winters, California.
The responses provide additional details on specifications such as well construction zone dimensions, conductor casing requirements, well screen dispersant chemical application time, drilling footage recording methods, well permit application submission process, and mud pit versus shale shaker clarification. Exhibits include an updated well site plan detail and casing connection collar detail.
View the file
Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| 12905B23R0019 Questions - Responses 7-21-2023.pdf | ||
| 12905B23R0019 Amend 01.pdf | ||
| Sign In Sheet for Well Site Visit.pdf | ||
| 12905B23R0019 Amend 01 Adding Drawings.pdf | ||
| Attachment III - Past Performance Questionnaire (PPQ).pdf | ||
| Attachment IV - ARS-371 - CONSTRUCTION PROGRESS AND PAYMENT SCHEDULE.pdf | ||
| 12905B23R0019 with T-n-Cs and Attach I - II Final.pdf | ||
| Attachment V - ARS-372 - CONTRACTORS REQUEST FOR PAYMENT TRANSMITTAL.pdf | ||
| Attachment VI - Contractor RFI FORM.pdf |
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Text version
Bid Question
RESPONSE
From travis@shddrilling.com Date 7/12/2023
Company
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.1 Owner Job No. 12905B23R0019
CEI RFI No. 1 CEI Job No. 230525
RFI DESCRIPTION:
What are the exact dimensions of the well construction zone shown in drawing W-4? Where is the new well to be placed within this space? Is this space completely free of trees? And is there any possibility of trees being removed if the well construction zone is not of adequate size? (W-4 ) DRAWINGS AFFECTED: W-4, W-5
COFFMAN RESPONSE:
A new detail is provided with additional dimensions for the well drilling site. It is attached as “Well Site
Plan Detail” and will be added to Sheet W-5 in the conformed drawing set after bidding.
See attached Addendum 1, Exhibit 1 (A1E1).
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the satisfactory performance of their work.
By: Alan Gay, PE Date: 14 July 2023
50' OFFSET
FROM ROAD
WELL HEAD #4
38°29'42.00''N 121°58'32.95''W 22'
~28'
65'
AS REQUIRED
WELL DEVELOPMENT
DISPOSAL AREA
PROPERTY
LINE
WELL CONSTRUCTION ZONE
AND APPROACH ZONE FOR
DRILLING EQUIPMENT
DISCHARGE
PIPE
12" HIGH PERIMETER
BERM, SEE STANDARD
SPEC 19-7.02C.
12" HIGH PERIMETER BERM,
SEE STANDARD SPEC 19-7.02C.
1 INCH = 30 FEET
G
RAVEL RO
ADW
AY
G
RAVEL RO
ADW
AY
AS REQ
UIRED
SHEET NO:
PROJ. NO.
DRAWN
CHECKED
DATE
230525
PROJECT:
TITLE:
CLIENT: USDA ARS
USDA ARS WINTERS CA IRRIGATION WELL REF:
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/23 www.coffman.com ph 509.328.2994
10 N. Post Street, Suite 500 Spokane, WA 99201
AEG
IJS
A1E1 07/14/2023
WELL SITE CONSTRUCTION DETAILS
WELL CONSTRUCTION SITE PLAN DETAIL
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.3 Owner Job No. 12905B23R0019
CEI RFI No. 2 CEI Job No. 230525
Specs state peep holes on conductor casing must be welded up. Is the conductor casing required to be collared, or is
PE pipe acceptable? (2.1A) DRAWINGS AFFECTED: None
The conductor casing is required to be steel and collared as specified in 33 21 00 2.1.A.
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.4 Owner Job No. 12905B23R0019
CEI RFI No. 3 CEI Job No. 230525
Specs say Aqua Clear PFD must sit for 12-24 hours. Is there a more specific time frame that will be required? (3.12E)
DRAWINGS AFFECTED: None
The minimum length of time the dispersant chemical is to remain undisturbed on each well screen section is 12 hours.
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.5 Owner Job No. 12905B23R0019
CEI RFI No. 4 CEI Job No. 230525
Drilling footage must be recorded. Is this through a geolograph or hand written dailies? (3.1A) DRAWINGS
AFFECTED: None
The drilling footage recording method is to be automatically linked to the advancing drill, whether that is a geolograph or a more modern alternative.
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.6 Owner Job No. 12905B23R0019
CEI RFI No. 5 CEI Job No. 230525
Specs say we must file for the well permit and destruction permit. I see nothing on a well destruction in the specs.
(3.3D). DRAWINGS AFFECTED: None
Replace specification section 33 21 00 paragraph 3.3D with the following:
D. The Contractor shall submit a draft copy of the Solano County Well Construction Permit Applications for review by the USDA prior to submitting to Solano County.
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.7 Owner Job No. 12905B23R0019
CEI RFI No. 6 CEI Job No. 230525
Specs call for mild steel blank casing and stainless steel wire wrap screen. The specs also specify that collars are to be of the same material as the casing. What about at joints where blank meets screen? There is no mention of dielectric couplers. Are we to weld the dissimilar metaerials together regardless of potential corrosion? (2.1A).
DRAWINGS AFFECTED: W-6
Replace specification section 33 21 00 paragraph 2.3.C.1 with the following:
1. For field assembly by welding, well casing and screen section ends shall have collars of the same thickness and physical properties as the corresponding casing or screen section. Collars connecting well casing to well screen sections shall be assembled with a slip ring assembly as illustrated on Plan Sheet W-5. Collars shall be a minimum of five (5) inches wide for blank well casing and joining well casing and well screen, and four (4) inches wide for well screen.
A new detail is provided illustrating the cross section of the casing wall/well screen wall interface and collar assembly.
See attached Addendum 1, Exhibit 2 (A1E2).
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the
WELL CASING TO WELL SCREEN
WELDED CONNECTION COLLAR DETAIL
INSTALLATION PROCEDURE:
1. SLIP CARBON STEEL RING A, WITH MACHINED SURFACE UP OVER END OF STAINLESS STEEL
SCREEN END.
2. ATTACH STAINLESS STEEL RING D TO TOP OF STAINLES STEEL SCREEN SECTION WITH CHAMFER
ON BOTTOM.
3. ASSEMBLE CARBON STEEL RINGS A, B, AND C. B IS AN OPEN RING. CLAMP B AROUND A AND C
MAKING SURE THAT A AND C ARE SNUB AGAINST D. TACK WELD IN PLACE.
4. SEAM WELD B
5. FILLET WELD B TO A AND C.
CARBON STEEL
CASING SECTION
STAINLESS
STEEL SCREEN
SECTION END
C
D
A
B
SHEET NO:
PROJ. NO.
DRAWN
CHECKED
DATE
230525
PROJECT:
TITLE:
CLIENT: USDA ARS
USDA ARS WINTERS CA IRRIGATION WELL REF:
P:
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: 7 /14
/23 www.coffman.com ph 509.328.2994
10 N. Post Street, Suite 500 Spokane, WA 99201
AEG
IJS
A1E2 07/14/2023
CASING CONNECTION COLLAR
Stonehouse Drilling & Construction
LLC. Project Wolfskill Irrigation Well Ph 1
Reviewed by Alan Gay, PE Location Spokane
Contractor RFI No. 1.8 Owner Job No. 12905B23R0019
CEI RFI No. 7 CEI Job No. 230525
Specs say earthen pits are acceptable, but also calls for shale shakers. Shale shakers are used for above ground tanks, not earthen pits. Which method is to be used? (2.2C) DRAWINGS AFFECTED: None.
Specification Section 33 21 00 paragraph 2.2.B states, “The Contractor shall provide an earthen pit or mud tanks with a minimum capacity equal to the maximum borehole volume, and a configuration that effectively settles out drill cuttings before fluids are recirculated.”
Contractor is responsible for: omissions which shall be confirmed and correlated at the job site; fabrication processes and techniques of construction; coordination of their work with that of all other trades and the
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