Pre-Bid Engineering Discussion.pdf
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- Attached to
- Secant Wall Construction, Montgomery L/D, Ohio River, PA Federal contract opportunity
- Solicitation number
- W911WN21B8000
About this file
This solicitation package describes a requirements contract for secant pile wall construction at Montgomery Locks and Dam on the Ohio River in Pennsylvania. The U.S. Army Corps of Engineers, Pittsburgh District, requires drilling and installing 17 piles through the concrete apron, alluvium, and into rock. Work also includes installing instrumentation, conducting exploratory borings, demolishing existing baffles, removing portions of the apron, and pressure grouting the ends of the wall. The contractor must complete all work, including final submittals, by December 31, 2022. The contract value is estimated between $5-10 million. The solicitation will be issued on March 30, 2021 through the SAM.gov website. Interested vendors must register to receive any amendments. The resulting award will be a firm-fixed-price contract with a period of performance of 535 days from notice to proceed.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| Bid Results - Virtual Bid Opening 5-5-21.pdf | ||
| Attendance Register -Virtual Bid Opening 5-5-21.pdf | ||
| Amendment 0001 Revised Bid Schedule.xlsx | XLSX spreadsheet | |
| Amendment 0001 Revised Specifications Section 01 22 00.00 08.pdf | ||
| Amendment 0001 Revised Specifications Section 01 52 13.20 08.pdf | ||
| Amendment 0001 Revised Specifications Section 01 35 00.00 08.pdf | ||
| W911WN21B8000 Amendment 0001.pdf | ||
| Pre-Bid Contracting Discussion.pdf | ||
| Pre Bid Site Visit Sign In Sheet.pdf | ||
| Pre-Bid Site Visit Agenda Secant Wall.pdf | ||
| SAMPLE Bid Schedule.xlsx | XLSX spreadsheet | |
| Attachment 2 - Contract Drawings (25 Pages).pdf | ||
| Attachment 3 - Reference Drawings (23 Pages).pdf | ||
| W911WN21B8000.pdf | ||
| Attachment 1 - Technical Specifications (305 Pages).pdf | ||
| Attachment 4 - Davis Bacon Wage Determination (15 Pages).pdf |
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Text version
XX-A-XXX
DISCIPLINE DESIGNATOR AS PER A/E/C/ CADD
STANDARDS
SHEET TYPE DESIGNATOR AS PER A/E/C CADD
STANDARDS
DRAWING NUMBER
SHEET IDENTIFICATION KEY:
DRAWING SERIES
CODE
US Army Corps of Engineers ®
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CONTRACT DRAWINGS
SHEET ID DRAWING TITLE
GENERAL
00-G-001 COVERSHEET
00-G-002 CONTRACT AND REFERENCE DRAWING INDEX
00-G-003 STANDARD ABBREVIATIONS
GENERAL PLANS
04-C-101 CONTRACTOR WORK LIMITS PLAN
CORE BORINGS
10-B-001 GEOLOGICAL STANDARDS - UNIFIED SOIL CLASSIFICATIONS WITH ABBREVIATONS
10-B-002 GEOLOGICAL STANDARDS - ROCK AND SOIL DESCRIPTIONS WITH ABBREVIATONS
10-B-101 BORING LOCATION PLAN
10-B-102 PROPOSED EXPLORATORY TEST - BORING PLAN
10-B-103 INSTRUMENTATION PLAN - ENCLOSURE DETAIL, AND VIBRATING WIRE PIEZOMETER INSTALLATION DETAIL
10-B-601 BORING LOGS 18-EDM-RW-4 - SHEET 1 OF 3
10-B-602 BORING LOGS 18-EDM-RW-4 - SHEET 2 OF 3
10-B-603 BORING LOGS 18-EDM-RW-4 - SHEET 3 OF 3
10-B-604 BORING LOGS 18-EDM-RW-5 - SHEET 1 OF 3
10-B-605 BORING LOGS 18-EDM-RW-5 - SHEET 2 OF 3
10-B-606 BORING LOGS 18-EDM-RW-5 - SHEET 3 OF 3
PROPERTY SURVEYS
11-V-101 PROJECT DATA - HORIZONTAL AND VERTICAL CONTROL
GAGE RECORDS, HYDROGRAPHS, & DISCHARGES
14-V-601 STAGE HYDROGRAPHS 2018 - 2020 INCLUSIVE
14-V-602 STAGE-EXCEEDANCE AND STAGE-DISCHARGE GRAPHS
DAM MASONRY
40-ST101 DEMONSTRATION LIMITS - PLAN AND SECTION
40-SD101 DEMOLITION - PLAN AND SECTION
40-SD501 DEMOLITION OPTION - SECTION AND DETAIL
40-S-101 SECANT PILE WALL ALIGNMENT - PLAN AND DETAIL
40-S-501 SECANT PILE WALL - TYPICAL DETAIL AND SECTION
40-S-502 SECANT PILE WALL - END DETAILS
40-S-503 REINFORCEMENT BEAM - ELEVATION AND DETAIL
REFERENCE DRAWINGS
SHEET ID DRAWING TITLE
GENERAL INDEXES - COVER SHEET, SIGNATURE SHEET, GENERAL INDEX SHEETS, & PICTORIAL VIEWS
G-0180 COVERSHEET
G-0186 CONSTRUCTION SEQUENCE NOTES
G-2185 NEW AND EXISTING - DAM AND MACHINERY HOUSING - ELEVATIONS
GENERAL - GENERAL PLANS
C-1150 CONTRACTOR WORK LIMITS
SD3122 DAM PIER - MASONRY DEMOLITION - SECTIONS AND DETAIL
SURVEY AND RECREATION - GAGE RECORDS, HYDROGRAPHS, & DISCHARGES
V-6111 UPPER POOL STAGE HYDROGRAPHS 1995 - 1999 INCLUSIVE
V-6112 UPPER POOL STAGE HYDROGRAPHS 2000 - 2004 INCLUSIVE
V-6113 UPPER POOL STAGE HYDROGRAPHS 2005 - 2009 INCLUSIVE
V-6114 UPPER POOL STAGE HYDROGRAPHS 2010 - 2014 INCLUSIVE
V-6115 LOWER POOL STAGE HYDROGRAPHS 1995 - 1999 INCLUSIVE
V-6116 LOWER POOL STAGE HYDROGRAPHS 2000 - 2004 INCLUSIVE
V-6117 LOWER POOL STAGE HYDROGRAPHS 2005 - 2009 INCLUSIVE
V-6118 LOWER POOL STAGE HYDROGRAPHS 2010 - 2014 INCLUSIVE
V-6119 DURATION AND DISCHARGE CURVE
V-6120 UPPER POOL STAGE HYDROGRAPHS 2015 - 2017 INCLUSIVE
V-6121 LOWER POOL STAGE HYDROGRAPHS 2015 - 2017 INCLUSIVE
DAM - DAM MASONRY
ORB 3-2 - SHEET 3 DAM - PLAN, ELEVATION & SECTIONS
ORB 3-2 - SHEET 4 DAM - TYPICAL PLANS OF APRON
ORB 3-2 - SHEET 5 DAM - PILING AND REINFORCING PLAN AND BAFFLE WALL DETAILS
S-2276 GENERAL ARRANGEMENTS - TYPICAL DAM PIER AND MACHINERY HOUSING - ELEVATIONS AND SECTIONS
S-3278 GATE 3/PIER 3 - TRACK BEAM REPAIR CONSTRUCTION SEQUENCE - CONSTRUCTION AND WELD REPAIR NOTES
S-5300 CONCRETE REPAIR DETAILS
DAM - ELECTRICAL SYSTEMS
E-1185 ELECTRICAL SITE PLAN
SUGGESTED CONSTRUCTION SEQUENCE:
1. CONTRACTOR TO PROVIDE AND INSTALL A BULKHEAD SYSTEM TO THE TOP OF THE FIXED CREST DAM, COMMONLY REFERRED TO AS "FLASHBOARDS". REFER TO REFERENCE DRAWINGS FOR LOCATION OF SUPPORT HOLES FOR THE FLASHBOARDS. AFTER COMPLETION OF THE PROJECT, THESE FLASHBOARDS WILL BE PROPERTY OF THE GOVERNMENT. IN ORDER TO MITIGATE CURRENT FLOW AT THE LOCATION OF CONSTRUCTION, AN ADJUSTED GATE SCHEDULE HAS BEEN CREATED AND IS LOCATED WITHIN THE SPECIFICATIONS. (SECTION 01 35 00.00 08 SPECIAL
PROCEDURES).
2. CONTRACTOR TO INSTALL INSTRUMENTATION AND MONITORING DEVICES AS SHOWN ON THE CONTRACT DRAWINGS. CONTRACTOR TO SUBMIT DATA FROM INSTRUMENTATION, SEE SPECIFICATIONS FOR FURTHER
DETAILS. (DRAWING 10-B-103, SECTION 13 51 00.10 01 INSTRUMENTATION).
3. CONTRACTOR TO DRILL EXPLORATORY TEST BORINGS AT THE CENTER OF THE SELECTED SECANT PILES, 4 TOTAL HOLES, AS SHOWN ON THE CONTRACT DRAWINGS. CONTRACTOR TO SUBMIT DRILLER'S LOG, SEE SPECIFICATIONS FOR FURTHER DETAILS. (DRAWING 10-B-102, SECTION 01 35 00.00 08 SPECIAL PROCEDURES).
A. BASED ON RESULTS FROM DRILLER'S LOG OF EXPLORATORY TEST BORINGS, PRE-GROUTING (PHASE 1) MAY BE
REQUIRED. CONTRACTOR TO EVALUATE DRILLER'S LOG, IF VOIDS ARE PRESENT AND GREATER THAN SPECIFIED IN SPECIFICATIONS, CONTRACTOR TO SUBMIT A PHASE 1 VOID FILLING PLAN FOR GOVERNMENT APPROVAL. ASSUME 25'X10'X1' AREA OF PRE-GROUTING (PHASE 1) REQUIRED FOR BIDDING PURPOSES. REFER TO "UNDER APRON VOID FILLING" GROUTING SPECIFICATIONS FOR FURTHER DETAILS. (DRAWING 10-B-102, SECTION 31 67 00 UNDER APRON VOID FILLING)
4. CONTRACTOR TO CONSTRUCT A DEMONSTRATION SECANT PILE WALL WITHIN THE ALLOWABLE LIMITS SHOWN ON THE DRAWINGS. REFER TO SPECIFICATIONS FOR SUBMITTAL REQUIREMENTS. (DRAWING 40-ST101, SECTION 31 63
41.00 14 SECANT PILE WALL SYSTEM).
5. CONTRACTOR TO DEMOLISH EXISTING BAFFLES, AS REQUIRED, THAT WILL INTERFERE WITH PLACEMENT OF THE SECANT PILE WALL. POTENTIAL DEMOLITION OF EXISTING BAFFLES SHALL BE LIMITED TO THOSE SHOWN ON DRAWING 40-SD101 OF THE DRAWING PACKAGE. FOR DEMOLITION GUIDANCE, REFER TO THE SPECIFICATIONS.
(DRAWING 40-SD101, 40-SD501, SECTION 02 41 00 DEMOLITION AND DECONSTRUCTION).
6. CONTRACTOR TO LAY OUT LOCATION OF SECANT PILE WALL WITHIN ALLOWABLE LIMITS, PROVIDING DOCUMENTATION OF FINAL LOCATION. IF A TEMPLATE IS USED, GOVERNMENT APPROVAL IS REQUIRED FOR ANY STRUCTURE TO BE ATTACHED TO GOVERNMENT PROPERTY. (DRAWING 40-S-101, SECTION 31 63 41.00 14 SECANT
PILE WALL SYSTEM).
7. CONTRACTOR TO REMOVE AND DISPOSE LIMITED PORTIONS OF THE APRON, AS REQUIRED, WHILE REMAINING WITHIN THE MAXIMUM ALLOWABLE LIMITS FOR INSTALLATION OF SECANT PILE WALL. POTENTIAL ALTERNATIVES
FOR REMOVAL ARE AS FOLLOWS, BUT NOT LIMITED TO:
A. CORING THROUGH THE CONCRETE APRON. REFER TO REFERENCE DRAWINGS PACKAGE FOR CONCRETE
APRON DETAILS, REBAR REINFORCEMENT, AND TIMBER PILES LOCATIONS, AS WELL AS THE SPECIFICATIONS.
(DRAWING 40-SD101, 40-SD501, SECTION 31 63 41.00 14 SECANT PILE WALL SYSTEM, SECTION 02 42 00.00 08
DISPOSAL OF MATERIALS)
B. ALTERNATIVE METHODS TO BE PRESENTED BY CONTRACTOR WITHIN DEMOLITION MEANS AND METHODS PLAN
AND APPROVED BY GOVERNMENT.
8. CONTRACTOR TO DRILL AND PLACE PRIMARY PILES. CONTRACTOR TO ASSUME PRIMARY PILES TO HIT OBSTRUCTIONS ON 25% OF PILES. (DRAWING 40-S-101, 40-S-501, 40-S-502, SECTION 31 63 41.00 14 SECANT PILE WALL
SYSTEM).
9. CONTRACTOR TO DRILL AND PLACE SECONDARY PILES. CONTRACTOR TO ASSUME SECONDARY PILES TO HIT OBSTRUCTIONS ON 25% OF PILES. (DRAWING 40-S-101, 40-S-501, 40-S-502, SECTION 31 63 41.00 14 SECANT PILE WALL
SYSTEM, SECTION 05 50 14 STRUCTURAL METAL FABRICATIONS).
10. CONTRACTOR TO USE PRESSURE GROUTING METHODS AT BOTH ENDS OF THE SECANT PILE WALL, AS SHOWN IN
THE DRAWINGS. (DRAWING 40-S-502, SECTION 03 37 06.00 08 JET GROUTING).
11. CONTRACTOR MAY BE REQUIRED TO FILL VOIDS UNDER THE APRON THAT MAY BE HAVE FORMED DUE TO CONSTRUCTION. THE CONTRACTOR IS RESPONSIBLE FOR PROTECTING THE EXISTING APRON AND SUB-APRON MATERIALS. THE CONTRACTOR MUST COORDINATE WITH THE CONTRACTING OFFICER FOR PHASE 2 VOID FILLING AND APPROVAL IS REQUIRED BY THE CONTRACTING OFFICER PRIOR TO PHASE 2 VOID FILLING. AFTER APPROVAL, CONTRACTOR MUST SUBMIT A PHASE 2 VOID FILLING PLAN FOR GOVERNMENT APPROVAL. ASSUME 25'X10'X1' AREA OF POST-GROUTING (PHASE 2) REQUIRED FOR BIDDING PURPOSES. REFER TO "UNDER APRON VOID FILLING" GROUTING SPECIFICATIONS FOR FURTHER DETAILS. (SECTION 31 67 00 UNDER APRON VOID FILLING).
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