423-D-60247-Cell_1_Option_0003.pdf
PDF 360 KB Posted
- Attached to
- BROCK RESERVOIR GATE REPLACEMENT/REPAIRS Federal contract opportunity
- Solicitation number
- 140R3026R0004
About this file
This is a technical design drawing for cathodic protection system installation at the Warren H. Brock Reservoir, a Bureau of Reclamation facility in Denver, Colorado. The drawing (423-D-60247, Sheet 6 of 8) specifies detailed connection requirements for impressed current cathodic protection systems serving inlet/outlet structures, transition/trashrack/gate structures, and pipe inlet structures.
The design establishes material specifications and installation requirements including #6 AWG or larger stranded copper structure cables with HMWPE black sheathing, 1-inch diameter minimum galvanized RMC or flexible conduit, stainless steel conduit straps, and isolation components (phenolic or epoxy glass washers and Mylar/polyethylene sleeves) to prevent galvanic corrosion between dissimilar metals. Critical installation sequencing requirements mandate that new galvanized conduits and CPVC conduits remain uninstalled until new stainless steel gates are operational, with gate and thimble structure cable connections performed only when stainless steel gates are installed. Conduit anchoring specifications require placement every 5 feet on vertical segments and every 10 feet on horizontal segments using concrete anchors or pre-existing Unistrut. The drawing references related specifications (26 42 00 and 35 23 11) and installation section drawings (423-D-60240 and 423-D-60241) for 120" x 120" and 120" x 84" stainless steel slide gate installations. Provisions address optional gate work for Cell 1, allowing existing structure gate connections to tie into the new cathodic protection system through conduit from a new junction box if gates are not replaced.
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Text version
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IMPRESSED CURRENT
CATHODIC PROTECTION
SYSTEM
GATE AND THIMBLE
STRUCTURE
CONNECTION DETAILS
DENVER, CO
423-D-60247
DESIGNED
DRAWN
CHECKED
TECH. APPR.
APPROVED
ADMIN APPROVAL
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Daryl Little
Daryl Little
Avery Schilt
SCALE: NOT TO SCALE
PROFILE - PIPE INLET STRUCTURE
SCALE: NOT TO SCALE
E
GATE CABLE CONNECTION DETAIL
SCALE: NOT TO SCALE
PROFILE - TRANSITION/TRASHRACK/GATE STRUCTURE AND INLET/OUTLET STRUCTURES
SCALE: NOT TO SCALE
F
THIMBLE CABLE CONNECTION DETAIL
MATERIAL EXPLANATION
Item Description
Structure cable #6 AWG or larger stranded copper with HMWPE sheathing (black)
Structure cable conduit
1" diameter minimum (sized for number of cables), galvanized RMC or flexible conduit (for cables from structures to junction boxes)
Concrete conduit anchors
16" dia x 2 14" long Tapcon+ or equal
Conduit straps Stainless steel, sized for diameter of conduit
Isolation washer Phenolic or epoxy glass sized for the anchor bolts
Isolation sleeve Mylar, polyethylene, phenolic, or epoxy glass sized for the anchor bolts and holes
1. Anchor bolt installation details in accordance with drawings and Specification sections 26 42 00 and 35 23 11.
2. All anchor bolts attaching the gate frame to the thimble shall be isolated from the frame using isolation sleeves and washers.
3. One of the isolated anchor bolts connected to each thimble shall be used for the structure cable connection in accordance with the connection detail F. All other gate frame/thimble bolts shall follow general isolation detail G.
4. One of the non-isolated anchor bolts connected to each gate frame shall be used for the structure cable connection in accordance with the connection detail E.
5. Structure cable conduits shall be anchored to concrete every 5 feet for vertical segments and 10 feet for horizontal segments using conduit straps and concrete anchors or pre-existing Unistrut.
6. Cathodic protection system components are not to scale for visualization.
SCALE: NOT TO SCALE
G
GENERAL BOLT ISOLATION DETAIL
120" X 120" STAINLESS STEEL SLIDE GATE
INSTALLATION-SECTIONS......................................................................423-D-60240
120" X 84" STAINLESS STEEL SLIDE GATE
INSTALLATION-SECTIONS......................................................................423-D-60241
REFERENCE DRAWINGS
Thimble and gate structure cables galvanized conduits
Guardrail and metal grating not shown
Embedded cast iron thimble
Stainless steel gate frame Stainless steel gate frame
Grout
Gasket
Stainless steel stud anchor, see (-60240 and -60241)
Structure cable w/ crimped tongue ring connector
To gate structure conduit
Stainless steel stud anchor, see (-60240 and -60241)
Structure cable w/ crimped tongue ring connector
To thimble structure conduit
Isolation washer
Isolation sleeve
Guardrail and metal grating not shown
Thimble structure cable CPVC conduit
Thimble structure cable CPVC conduit
Thimble and gate structure cables galvanized conduits
New anchors to avoid contact with existing wall reinforcement see (-60241)
New anchors to avoid contact with existing wall reinforcement see (-60240)
Embedded cast iron thimble
Stainless steel gate frame
Gasket
Stainless steel stud anchor, see (-60240 and -60241)
Isolation washer
Isolation sleeve
Conduit extends to junction box
Conduit extends to junction box
Optional Gate work for Cell 1
New galvanized conduits not installed until new stainless steel gates are installed.
New galvanized conduits not installed until new stainless steel gates are installed.
New CPVC conduits not installed until new stainless steel gates are installed.
Isolation for Cell 1 gates performed only when stainless steel gates are installed
Thimble cable connection performed only when stainless steel gates are installed
Structure connection to gate performed only when stainless steel gates are installed
If Cell 1 gates are not replaced, the existing structure gate connections shall be connected to the new cathodic protection system through the existing conduit from the new junction box. All cathodic protection installation work shall be performed other than the connections to the gates and thimbles. These tasks shall only be performed when stainless steel gates are installed.
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| Sheets and Views |
| 22 x 34 |
| 2026-02-12T11:04:18-0700 | |
| DARYL LITTLE |
File details come from the government source that posted it. Updated .