IWQ 136094 Ad1.pdf
PDF 2 MB Posted
- Attached to
- IWQ 136094 Purchase of Headwalls
- Solicitation number
- PE-77023-NONST-2027-000000769
- Issued by
- Gwinnett County, Georgia
About this file
This is an addendum to a solicitation issued by the State of Georgia for the purchase of headwalls. The document serves as the first addendum (Ad1) to solicitation IWQ 136094, modifying or clarifying terms of the original request for bids. The addendum addresses specifications, requirements, or procedures related to the procurement of headwalls, which are structural components typically used in drainage, stormwater management, or similar infrastructure applications. The document establishes modifications to the original solicitation terms that bidders must acknowledge and incorporate into their proposals to ensure compliance with the updated requirements.
The addendum functions as a binding modification to the original solicitation documents and must be reviewed in conjunction with all other bid documents, including the scope of work, technical specifications, and general contract terms. Bidders are required to confirm receipt and understanding of this addendum as part of their bid submission process. Any pricing, delivery schedules, or technical specifications referenced in the original solicitation may be subject to revision based on the contents of this addendum, and failure to acknowledge the addendum may result in bid rejection or non-responsiveness.
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| File | Type | Posted |
|---|---|---|
| IWQ 136094 INV.pdf |
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Text version
September 30, 2026
ADDENDUM #1
IWQ 136094 Purchase of Headwalls
I. QUESTIONS & ANSWERS:
Q1. Should the headwalls conform to a specific standard, such as GDOT Standard 1125, or to a County drawing? If so, please share the drawing or any required dimensions?
A1. Please see the attached drawings.
Q2. Will the County unload at the DWR Central Facility using its own equipment, or should the vendor include offloading (e.g., boom or crane truck) in the unit price?
A2. Gwinnett County will unload using County equipment.
Q3. The references form asks for work of similar size and scope. Would references from other government supply contracts be acceptable?
A3. References will be acceptable, if the references provided meet similar size (ie. quantity) and scope (ie.
products provided).
This addendum should be signed in the space provided below and returned with your quote. Failure to do so may result in your quote being deemed non-responsive.
Thank you, Jenny Coleman Purchasing Associate II
Company Name __________________________________________________________________________________
Authorized Representative________________________________________________________________________
HEADWALL SIZE W1 W2 H1 H2 D E TONS BLOCKS
12" 2'-6" 3'-9" 0'-7" 2'-6" 1'-6" 1'-0" 0.55 N/A
15", 18" 3'-2" 4'-9" 1'-3" 3'-2" 1'-2" 1'-9" 0.92 1 24" 4'-2" 8'-2" 2'-0" 4'-2" 1'-8" 2'-9" 1.73 3
30", 36" 4'-8" 8'-8" 2'-4" 4'-8" 2'-4" 3'-3" 1.92 3 42", 48" 5'-8" 10'-11" 3'-6" 5'-9" 3'-0" 4'-3" 3.33 4 54", 60" 6'-5" 12'-6" 4'-0" 6'-5" 3'-5" 5'-0" 3.77 7 66", 72" 8'-5" 13'-5" 5'-7" 8'-0" 3'-0" 7'-0" 5.30 9
78", 84", 90", 96" 10'-2" 15'-10" 4'-0" 9'-0" 3'-4" 8'-4" 7.31 11
REINFORCED CONCRETE PIPE
HEADWALLS
3.5
45°
W2
H1
1'-0"
W1
E
6"
6"
1'-0"
6"
H2
D
MATERIALS:
CONCRETE: 4,000 PSI, TYPE I/II CEMENT
NOTES:
SEE PAGE 3.6 FOR HEADWALL SIZING
PARTS SHOWN:
30" HEADWALL FOR Ø18" RCP
HOLE
SIZE
CMP
INNER
DIAMETER
RCP
INNER
DIAMETER
HDPE
INNER
DIAMETER
12" 12" 8" 15" 15" 10" 18" 18" 12" 12" 24" 24" 15" 15", 18" 30" 30" 18" 24" 36" 36" 24" 42" 42" 30" 30" 48" 48" 36" 36" 54" 54" 42" 42" 60" 60" 48" 48" 66" 66" 72" 72" 54" 60" 78" 78" 60" 84" 84" 66" 90" 90" 72" 96" 96"
REINFORCED CONCRETE PIPE
HEADWALL SIZING
3.6
MATERIALS:
CONCRETE: 4,000 PSI, TYPE I/II CEMENT
NOTES:
SEE PAGE 3.5 FOR HEADWALL DIMENSIONS
HEADWALLS FOR CMP WILL HAVE A PIPE STUB UPON REQUEST
SINGLE WING HEADWALLS ARE NOT AVAILABLE
FOR HEADWALL SIZES >84"
PARTS SHOWN:
30" HEADWALL WITH DISSIPATORS FOR Ø18" RCP
WITH 3 DISSIPATOR BLOCKS
30" DOUBLE RUN HEADWALLS:
30" HEADWALL (SINGLE LEFT WING)
30" HEADWALL (SINGLE RIGHT WING)
DISSIPATOR BLOCKS:
BLOCKS ARE 12"Lx12"Wx6"H
3/4" CHAMFER
SPACING BETWEEN BLOCKS IS 6"
EACH BLOCK IS 0.04 TONS
SINGLE RIGHT WING HEADWALL
SINGLE LEFT WING HEADWALL
TO BE JOINED IN FIELD
BY CONTRACTOR
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