10-J. Attachments 1-5 - Reports Aerial Maps.pdf

PDF 11 MB Posted Mar 24, 2026

Attached to: Irwin Creek WWTP Outfall Solids Cleaning Removal Service
Solicitation number: FY27-RFP-04
Issued by: Mecklenburg County, Charlotte City, North Carolina

About this file

Written by GovTribe AI · Mar 24, 2026

This file contains technical attachments and site documentation for the Irwin Creek WWTP Outfall Solids Cleaning Removal Service project managed by Charlotte Water in North Carolina. The project involves cleaning a contaminated 36-inch trunk sewer outfall, with work including sediment collection, transportation to the Irwin Creek WWTP treatment operations, dewatering, and safe disposal of contaminants. The sediment report documents approximately 2,988 cubic feet (110 cubic yards) of debris and sediment throughout the 9,813-foot system spanning multiple manholes from MH-18642 to MH-19902. Work is subject to blackout dates throughout the year (ranging from January 7-16 through December 6-17) during which no disruption to flow entering Irwin Creek WWTP or McAlpine Creek WWTP can occur, with Charlotte Water providing 24-48 hours advanced notice of any changes to these restrictions.

The project establishes specific discharge limits for treated water depending on the discharge location. If treated water from the 36-inch sewer cleaning discharges to the McAlpine 54-inch sewer at a maximum flow rate of 1 MGD, discharge allocation limits apply for various parameters including arsenic (75 ug/l), cadmium (30 ug/l), chromium (265 ug/l), copper (1,141 ug/l), and zinc (4,131 ug/l). Alternatively, if discharge occurs to the Irwin Creek WWTP, more stringent limits apply, with arsenic at 13.8 ug/l, cadmium at 6.6 ug/l, chromium at 65 ug/l, copper at 298 ug/l, and zinc at 933 ug/l. The site plan identifies access points at various locations including 3736, 3630, and 3450 Sargeant Drive, with existing meter locations showing average daily flows of 0.19 mgd, 0.36 mgd, 0.49 mgd, and 0.96 mgd. A bypass pumping system with plug installation is required to prevent sediment from entering the plant, and a 20-million-gallon equalization basin is available on site.

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Other files

File	Type	Posted
5-E. Bonfire MWSBE Utilization Form.pdf	PDF	Mar 24, 2026
2-D. Bonfire Proposal Submission Form.pdf	PDF	Mar 24, 2026
7-H. Key Personnel and Other Resources Form.pdf	PDF	Mar 24, 2026
4-B. FY27-RFP-04 Irwin Creek WWTP Outfall Solids Cleaning Removal Service.pdf	PDF	Mar 24, 2026
8-I. Bonfire Contractor Safety Assessment Form.pdf	PDF	Mar 24, 2026
9-C. FY27-RFP-04 Sample Contract.docx	DOCX document	Mar 24, 2026
6-G. Price Schedule.pdf	PDF	Mar 24, 2026
1-F. Bonfire References Form.pdf	PDF	Mar 24, 2026
3-A. Bonfire Procurement Portal Instructions.pdf	PDF	Mar 24, 2026

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ATTACHMENT 1

TEST RESULTS FROM SOLIDS TESTING ALONG THE 36” TRUNK

SEWER

ATTACHMENT 2

DISCHARGE LIMITS FOR TREATED WATER FROM IRWIN 36”

SEWER CLEANING DISCHARGING TO MCALPINE 54” SEWER

WASTEWATER DISCHARGE ALLOCATION LIMTS FOR THE

TREATED WATER FROM IRWIN 36” SEWER CLEANING

THIS CHART WILL BE USED IF TREATED WATER FROM IRWIN 36”

SEWER CLEANING BEING DISCHARGED TO THE MCALPINE 54”

SEWER

BASED ON A MAXIMUM FLOW RATE OF 1 MGD

Parameter Concentration

As: 75 ug/l

Cd: 30 ug/l

Cr: 265 ug/l

Cu: 1141 ug/l

Cn: 52 ug/l

Pb: 240 ug/l

Hg: 4.1 ug/l

Mo: 109 ug/l

Ni: 809 ug/l

Se: 35 ug/l

Ag: 80 ug/l

Zn: 4131 ug/l

ATTACHMENT 3

DISCHARGE LIMITS FOR TREATED WATER FROM IRWIN 36”

SEWER CLEANING DISCHARGING TO IRWIN WWTP

WASTEWATER DISCHARGE ALLOCATION LIMTS FOR THE

TREATED WATER FROM IRWIN 36” SEWER CLEANING

THIS CHART WILL BE USED IF TREATED WATER FROM IRWIN 36”

SEWER CLEANING BEING DISCHARGED TO THE IRWIN CREEK

WWTP

BASED ON A MAXIMUM FLOW RATE OF 1 MGD

Parameter Concentration

As: 13.8 ug/l

Cd: 6.6 ug/l

Cr: 65 ug/l

Cu: 298 ug/l

Cn: 12.5 ug/l

Pb: 46.5 ug/l

Hg: .34 ug/l

Mo: 20.7 ug/l

Ni: 101.5 ug/l

Se: 9.5 ug/l

Ag: 4 ug/l

Zn: 933 ug/l

ATTACHMENT 4

BLACKOUT DATES

Work being performed during the dates listed below is subject to how the work is being performed. No disruption to the flow entering Irwin Creek WWTP and

McAlpine Creek WWTP can take place during these dates.

Although not anticipated, Charlotte Water reserves the right to change/update the blackout dates for any reason. Charlotte Water will provide 24-48 hour advanced notice of expected changes to these dates.

January 7-16th

February 5-9th

March 1-10th

April 4th-8th and 13th – 16th

May 3rd – 7th

June 1st - 11th

July 7th – 11th and 13th – 16th

August 5th – 9th

September 14th – 21st

October 4th – 6th

November 1st – 4th

December 6-17th

ATTACHMENT 5

SEDIMENT REPORT

UPSTREAM

MANHOLE

DOWNSTREAM

MANHOLE

Distance Profiled (ft)

Debris ( ft3 )

Average Water Level (in)

Diameter (in)

Comments

MH-18642 MH-52239 322 36

Heavy debris present and ragging. Tap coming in at US MH but unable to rope tag. MH located in the woods behind the tee box

MH-52239 MH-254640 176 37 10 36

MH-254640 MH-24900 105 0 0 36

MH-24900 MH-24901 66 1 9 36

MH-24901 MH-254638 101 0 9 36

MH-254638 MH-254635 216 0 9 36

MH-254635 MH-24907 438 36

Debris throughout line. Unable to pass debris in the pipe. Crawler was only able to make it 7' U/S and 35' feet D/S. 5" of sediment and 2" of water about the debris.

MH-24907 MH-221158 8 3 10 36

MH-221158 MH-254633 189 25 22 36

MH-254633 MH-254642 368 4 6 36

MH-254642 MH-254645 252 0 6 36

MH-254645 MH-24934 63 0 5 36

MH-24934 MH-254648 90 2 6 36

MH-254648 MH-254649 118 1 5 36

MH-254649 MH-254652 140 2 0 36

MH-254652 MH-254653 192 0 5 36

MH-254653 MH-254654 237 1 5 36

MH-254654 MH-254650 275 13 6 36

MH-254650 MH-254646 251 11 6 36

MH-254646 MH-24884 208 15 12 36

MH-24884 MH-254644 91 5 6 36

MH-254644 MH-254643 131 7 6 36

MH-254643 MH-254641 222 23 7 36

MH-254641 MH-254639 132 10 8 36

MH-254639 MH-254637 195 42 15 36

MH-254637 MH-254634 186 45 23 36

MH-254634 MH-254632 172 137 11 36

MH-254632 MH-24787 103 1 24 36

MH-24787 MH-254631 379 90 18 36

MH-254631 MH-24770 503 132 42 36

MH-24770 MH-254630 350 5 10 36

MH-254630 MH-254629 123 34 12 36

MH-254629 MH-254628 112 3 12 36

MH-254628 MH-254627 220 210 14 36

MH-254627 MH-24749 222 196 15 36

MH-24749 MH-254626 381 305 27 36

MH-254626 MH-251310 252 254 16 36

MH-251310 MH-251307 295 305.03 17 36

MH-251307 MH-251304 252 391 17 36

MH-251304 MH-251300 71 62.71 15 36

MH-251300 MH-251293 248 163 15 36

MH-251293 MH-251296 76 57.13 16 36

MH-251296 MH-535997 343 168 15 36

MH-535997 MH-251294 33 12 15 36

MH-251294 MH-251305 367 85 16 36

MH-251305 MH-251299 255 130 15 36

MH-251299 MH-1 35 36

MH-1 MH-2 26 36

MH-2 MH-19902 223 36

9813 ft 2988 cubic feet 110 cubic yards

IRWIN CREEK 36" SEDIMENT ESTIMATES

Report Date11/24/2025

UNKNOWN

GM-8705

GM-8606

UNKNOWN

GM-154603

GM-94719

GM-67371

GM-67040

GM-67519

GM-67518

GM-9993

GM-9487

GM-9806

GM-9805

GM-9114

GM-67512

GM-9317

GM-9060

GM-9059

GM-8706

GM-164061

UNKNOWN

UNKNOWNGM-67520

GM-9804

GM-9320

GM-9319

GM-67517

GM-9994

GM-9995

GM-9996

GM-66914

GM-9318

GM-67037

GM-67516

Asset No.

GM-94128

GM-67372

GM-9992

GM-9997

GM-67515

GM-67514

GM-67513

GM-67375

GM-67374

GM-67373

GM-9117

GM-9116

GM-9115

GM-67039

GM-67038

S S

SUNNYCREST LN

SEAMAN DR

SCO

TTSD

ALE RD

SARGEANT DR

LLING

W O

D DR

REID AV

LYNETTE CT

FIELDCREST RD

DELLA DR

CRESTRIDGE DR

BROADVIEW DR

BEECH NUT RD

DARRO

CLAN

D R

M S

GOLDEN RIDGE LN

SPRING OAK DR

A V

MOR

ANTO

N RD

GRA

ONT D

O N

D R

L N

MANCHESTER DR

ARCHER AV

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

H -2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

MH-2

M H

-2

MH-254649

M H

-2

M H

-2

M H

-2

M H

-2

MH-254633

MH-221158

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-2

M H

-5

M H

-1

ACCESS POINTS

(TYP)

FIGURE 1

AutoCAD SHX Text File: C:\USERS\8504\ONEDRIVE - CHA CONSULTING, INC\DESKTOP\CHA PROJECTS\CMUD\IRWIN CREEK\IRWIN CREEK SITE PLAN.DWG Saved: 11/12/2025 2:56:14 PM Plotted: 11/12/2025 4:30:58 PM Current User: Chapman, Joey LastSavedBy: 8504C:\USERS\8504\ONEDRIVE - CHA CONSULTING, INC\DESKTOP\CHA PROJECTS\CMUD\IRWIN CREEK\IRWIN CREEK SITE PLAN.DWG Saved: 11/12/2025 2:56:14 PM Plotted: 11/12/2025 4:30:58 PM Current User: Chapman, Joey LastSavedBy: 8504 Saved: 11/12/2025 2:56:14 PM Plotted: 11/12/2025 4:30:58 PM Current User: Chapman, Joey LastSavedBy: 850411/12/2025 2:56:14 PM Plotted: 11/12/2025 4:30:58 PM Current User: Chapman, Joey LastSavedBy: 8504 Plotted: 11/12/2025 4:30:58 PM Current User: Chapman, Joey LastSavedBy: 850411/12/2025 4:30:58 PM Current User: Chapman, Joey LastSavedBy: 8504 Current User: Chapman, Joey LastSavedBy: 8504Chapman, Joey LastSavedBy: 8504 LastSavedBy: 85048504

Colangelo, Mark Stamp

Colangelo, Mark Arrow

Colangelo, Mark Typewriter

FLOW

Colangelo, Mark Rectangle

Colangelo, Mark Typewriter

AERIAL CROSSING

Colangelo, Mark Arrow

Colangelo, Mark Typewriter

NO FLOW FROM THIS SEWER. ABANDONED

Colangelo, Mark Arrow

Colangelo, Mark Typewriter 10"

Colangelo, Mark Typewriter 8"

Colangelo, Mark Typewriter 24"

Colangelo, Mark Line

Colangelo, Mark Oval

Colangelo, Mark Line

Colangelo, Mark Typewriter 8"

Colangelo, Mark Line

Colangelo, Mark Polygon Line

Colangelo, Mark Line

Colangelo, Mark Oval

Colangelo, Mark Line

Colangelo, Mark Oval

Colangelo, Mark Line

Colangelo, Mark Oval

Colangelo, Mark Line

Colangelo, Mark Typewriter 54"

Colangelo, Mark Typewriter 36"

Colangelo, Mark Arrow

Colangelo, Mark Typewriter 8"

Colangelo, Mark Polygon Line

Colangelo, Mark Typewriter

IRWIN CREEK WWTP

Colangelo, Mark Typewriter

POSSIBLE PRIVATE PROPERTY ACCESS POINTS

3736 SARGEANT DR

3630 SARGEANT DR

3736 SARGEANT DR

3450 SARGEANT DR

Colangelo, Mark Typewriter

MH-24752

Colangelo, Mark Arrow

Colangelo, Mark Oval

Colangelo, Mark Typewriter Meter Location 3 ADF = 0.49 mgd

Colangelo, Mark Rectangle

Colangelo, Mark Typewriter Meter Location 2 ADF = 0.36 mgd

Colangelo, Mark Arrow

Colangelo, Mark Typewriter Meter Location 1 ADF = 0.19 mgd

Colangelo, Mark Rectangle

Lambert, Mark Callout Existing Permanent Meter - Site 38 ADF = 0.96 mgd

S S

MH-251299

MH-2

MH-1

BYPASS PUMPS

PLUG MUST BE INSTALLED TO KEEP

SEDIMENT OUT OF THE PLANT

STAGING AREA

20 MILLION GALLON EQ BASIN

FIGURE 2

AutoCAD SHX Text File: C:\USERS\8504\ONEDRIVE - CHA CONSULTING, INC\DESKTOP\CHA PROJECTS\CMUD\IRWIN CREEK\IRWIN CREEK SITE PLAN.DWG Saved: 11/13/2025 2:05:14 PM Plotted: 11/13/2025 2:14:16 PM Current User: Chapman, Joey LastSavedBy: 8504C:\USERS\8504\ONEDRIVE - CHA CONSULTING, INC\DESKTOP\CHA PROJECTS\CMUD\IRWIN CREEK\IRWIN CREEK SITE PLAN.DWG Saved: 11/13/2025 2:05:14 PM Plotted: 11/13/2025 2:14:16 PM Current User: Chapman, Joey LastSavedBy: 8504 Saved: 11/13/2025 2:05:14 PM Plotted: 11/13/2025 2:14:16 PM Current User: Chapman, Joey LastSavedBy: 850411/13/2025 2:05:14 PM Plotted: 11/13/2025 2:14:16 PM Current User: Chapman, Joey LastSavedBy: 8504 Plotted: 11/13/2025 2:14:16 PM Current User: Chapman, Joey LastSavedBy: 850411/13/2025 2:14:16 PM Current User: Chapman, Joey LastSavedBy: 8504 Current User: Chapman, Joey LastSavedBy: 8504Chapman, Joey LastSavedBy: 8504 LastSavedBy: 85048504

Colangelo, Mark Line

Colangelo, Mark Typewriter 54"

Colangelo, Mark Text Box

END OF PROJECT

Colangelo, Mark Arrow

Colangelo, Mark Typewriter

FLOW

Colangelo, Mark Typewriter

MH-19902

Colangelo, Mark Typewriter

IRWIN CREEK WWTP

Colangelo, Mark Polygon Line

Colangelo, Mark Oval

Colangelo, Mark Text Box McAlpine 54" sewer

Sheets and Views

FIG 1

Sheets and Views

FIG 2

File details come from the government source that posted it. Updated Mar 24, 2026.