Amendment 0001 Drawings W9128F21B0022.pdf
PDF 280 KB Posted
- Attached to
- W9128F21B0022 - Replacement subsurface drainage system in the 115kV and 230kV Oahe SD Switchyard Federal contract opportunity
- Solicitation number
- 7987
About this file
This solicitation package includes an invitation for bids for a subsurface drainage system replacement project at the 115kV and 230kV Oahe Switchyard in South Dakota. Work will require removing the existing drainage system and installing new perforated and solid PVC piping, pipe casing under roadways, aggregate materials for bedding and cover, and new gate valves. Due care must be taken during construction to avoid damaging nearby electrical components, the grounding mat, underground utilities, and structures. Bids are due by August 27, 2021, with the Department of the Army Corps of Engineers, Omaha District serving as the contracting agency overseeing the project.
View the file
Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| ABSTRACT W9128F21B0022.pdf | ||
| Amendment 0001 W9128F21B0022 Switchyard Drain Tile.pdf | ||
| Site Visit Sign in W9128F21B0022.pdf | ||
| Amendment 0001 Specs W9128F21B0022.pdf | ||
| W9128F21B0022 Switchyard Drain Tile Replacement 7987.pdf | ||
| W9128F21B0022 Switchyard Drain Tile Replacement Oahe.docx | DOCX document | |
| Specs - W9128F21B0022 Switchyard Drain Tile Replacement Oahe.pdf | ||
| Dwgs - W9128F21B0022 Switchyard Drain Tile Replacement Oahe Dam SD.pdf |
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Text version
TRENCH WALL
SLOPING
4" MIN. BEDDING
HAUNCHING
WALL
TRENCH
VERTICAL
TRENCH WALL
HAUNCH ZONE
HAUNCHING
EXISTING CLAY GREASE TRAP
OUTFALL PIPE
BOTTOM PORTION OF GREASE TRAP TO REMAIN
EXISTING CLAY TOP BELL
SURFACE COURSE
WAPA CRUSHED ROCK
SEE SPECS
FRAME & COVER
SIZE 18A M.H.
CONCRETE
PRECAST
WITH CONCRETE MANHOLE SECTION
CLAY TOP BELL TO BE REMOVED AND REPLACED
BACKFILL
REUSED IMPERVIOUS
SDDOT AGGREGATE TYPE 1 CLASS B
SOLID PIPE INSIDE PIPE CASING
COVER OVER TOP OF PIPE
1" SDDOT AGGREGATE
SEE SPEC 33 46 16 FOR DETAILS
PIPE SHALL BE WRAPPED IN GEOTEXTILE SLEEVE
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TRENCH WIDTH
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GENERAL PIPING NOTES:
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DRAIN PIPE BEDDING AND FILL DETAILS
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STABILIZED ROADWAY
DEEP OIL/DRAIN PIPE DETAILS:
9" 9"
4. SEE SPECIFICATION SECTION 32 23 00.00 20 FOR EXCAVATION AND FILL DETAILS.
SHALL BE AS SPECIFIED IN ASTM D 2321.
3. MINIMUM COVER FOR CONSTRUCTION LOADS OVER PLASTIC PIPES
OF THE AASHTO STANDARD SPECIFICATIONS FOR HIGHWAY BRIDGES.
STEEL PIPES SHALL BE AS SPECIFIED IN SECTION 26, DIVISION II
2. MINIMUM COVER FOR CONSTRUCTION LOADS OVER CORRUGATED
SPECIFICATIONS.
SECTION 01400 SPECIAL SAFETY REQUIREMENTS OF THE
1. EXCAVATION AND TRENCHING SHALL BE IN ACCORDANCE WITH
NO SCALE
TYPICAL PLAN VIEW
NO SCALE
SECTION
18" DIA.
GREASE TRAP NOTES:
CLAY GREASE TRAP
1. Bc = OUTSIDE PIPE DIAMETER
LEGEND:
1. Bc = OUTSIDE PIPE DIAMETER
LEGEND:
4"
4"
FINAL BACKFILLBE LESS THAN 3/4 " IN THICKNESS
GROUT MIXTURE JOINT SHALL NOT
SECURELY SEATING IN A 1:2
COVER & FRAME INSTALLED BY
4. SEE AS-BUILTS FOR ADDITIONAL INFORMATION.
3. PIPE SECTIONS WILL NEED TO BE MEASURED IN THE FIELD PRIOR TO CONSTRUCTION.
2. PIPES SHOULD REMAIN AS INDICATED ON DEMOLITION PLAN.
1. REMOVE ENTIRE STRUCTURE IF GREASE TRAP IS TO BE REMOVED.
1. BEDDING DEPTH SHALL BE INCREASED TO 6" IN ROCK CUTS.
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GENERAL NOTES:
NEW PVC DRAIN PIPE CONSTRUCTION
PERFORATED.
PERFORATIONS. ALL OTHER PIPING WITHIN THE SWITCHYARD FENCE LINE SHALL BE
4. ENCASED PIPE AND PIPE OUTSIDE THE SWITCHYARD FENCE SHALL BE SOLID, WITHOUT
3. NEW PVC PIPE SHALL BE PLACED ABOVE GROUNDING MAT.
POSSIBLE.
2. REPLACEMENT PVC PIPE DEPTH SHOULD NOT EXCEED EXISTING PIPE DEPTH WHERE
INFORMATION.
FIRST CLEANOUT/VALVE OUTSIDE THE FENCE LINE. SEE SHEET CS101 FOR ADDITIONAL
INCREASES TO 6" FIVE FEET OUTSIDE OF A FENCE LINE OR AT THE LOCATION OF THE
1. PIPE DIAMETER OF NEW PVC DRAIN PIPE IS 4" INSIDE SWITCHYARD. DIAMETER
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