Attachment C3 - CSO Design Coordination_Key Decision Tracking Log.xlsx

XLSX spreadsheet 56 KB Posted May 26, 2026

Attached to: Site Improvements at St. Aubin, Belle Isle, and Baby Creek CSO Facilities
Solicitation number: REQ - 0009198
Issued by: Wayne County, Michigan

About this file

Written by GovTribe AI · Jun 2, 2026

This is a Design Coordination Key Decision Tracking Log for CSO (Combined Sewer Overflow) Facilities Improvements managed by the Great Lakes Water Authority (GLWA) for the Hazen-CDM Cross Coordination Project. The document outlines preliminary design recommendations and specifications for nine CSO facilities across Michigan, including St. Aubin SDF, Belle Isle RTB, Baby Creek SDF, Conner Creek RTB, Hubbell Southfield RTB, Leib CSO, Oakwood CSO, Puritan Fenkell RTB, and Seven Mile RTB. The log tracks 22 design decision items spanning multiple disciplines including screening technology, disinfection systems, chemical storage and handling, mixing systems, chlorination control strategies, odor control, electrical systems, architectural rehabilitation, and safety improvements. Key design specifications include Romag screen technology with rehabilitation of existing screens, FRP chemical storage tanks certified to RTP-1 standards, centrifugal sealless magnetic drive pumps, polyethylene piping with fused joints at certain facilities and PVC piping at others, Gas Masterrr induction mixers, and colorimetric TRC analyzers by Swan. The document was last revised on August 16, 2023, and references related technical memoranda and basis of design documents for coordination purposes.

The tracking log emphasizes standardization across facilities while accommodating site-specific variations. Design coordination notes indicate that specifications such as chemical piping materials and joint types have been evaluated during conceptual design phases and adjusted based on input from GLWA operations and maintenance staff preferences. Safety improvements across all nine CSOs include fall protection enhancements for ladders and hatches and replacement of lift cylinders with lift-assisted hatches on dewatering pump access plates. Architectural rehabilitation work is assigned to project code 2200061 for all facilities. Supporting coordination items include influent sampling requirements, screen flushing system specifications, and floor coating timing. The document references related technical materials and design basis documentation maintained in the CSO Control Program SharePoint repository, indicating ongoing design development and multi-disciplinary coordination among project teams.

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Attachment C2- CS-299_CSO_NA_Report_Vol_6_Appendices.pdf	PDF	May 26, 2026
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Attachment A3- GLWA PMP.docx	DOCX document	May 26, 2026
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Attachment B4 - Spec Section 01 79 23 - Instruction of Operation and Maintenance Personnel.PDF	PDF	May 26, 2026
Attachment A4 - GLWA CAD BIM Standards - Version 0.0.pdf	PDF	May 26, 2026
2-Attachment No. 2 - REQ-0009198- Vendor Certifications Solicitation.pdf	PDF	May 26, 2026
6-Attachment No. 6 - REQ-0009198 - Task Cost Matrix.xlsx	XLSX spreadsheet	May 26, 2026
8-Attachment No. 7 - REQ-0009198 - Statement of Minimum Qualifications (2).docx	DOCX document	May 26, 2026
Attachment B1 - Specification Section 01 78 40 - OnBase Digital Document Turnover.PDF	PDF	May 26, 2026
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4-Attachment No. 4 - REQ-0009198 - B.I.D. Requirements.pdf	PDF	May 26, 2026
3-Attachment No. 3 - REQ-0009198 - Scope of Work.pdf	PDF	May 26, 2026
1-Attachment No. 1 - REQ-0009198 - GLWA Engineering Design Services Contract Rev 4-1-2026.pdf	PDF	May 26, 2026
Attachment B3 - Specification Section 01 33 30 Asset Turnover Feb 2024.PDF	PDF	May 26, 2026
Attachment C1 - CS-299_CSO_NA_Report_Vol_2_Sect_04-14.pdf	PDF	May 26, 2026
5-Attachment No. 5 - REQ-0009198 - Solicitation Subcontractor List.pdf	PDF	May 26, 2026
9-REQ-0009198 - Solicitation Cover - Instructions to Vendors.pdf	PDF	May 26, 2026

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Hazen-CDM Cross Coordination

		Project:	Design Services of CSO Facilities Improvements
		Owner:	Great Lakes Water Authority (GLWA)
		Revised:	8/16/23
		GLWA CSO Facilities Design Coordination
		Item No.	Description	Preliminary Recommendation			Comments / Notes
				St. Aubin SDF (STA)	Leib CSO	Oakwood CSO
		1	Screen Technology	Romag
(Rehab Existing)	Romag	Not part of scope (existing screens are perf. Plate technology)
		2	Chemical Storage Tank	FRP (RTP-1 Certified)	FRP (RTP-1 Certified)	FRP (RTP-1 Certified)
		3	Chemical Pump Technology	Centrifugal seal less, magnetic drive pumps	Centrifugal seal less, magnetic drive pumps	Centrifugal seal less, magnetic drive pumps
		4	Feed pump discharge configuration (e.g. manifold loop like CON, BC) vs. dedicated pump per mixing chamber)	Manifold loop with dedicated flow control valve stations to each mixing chamber*	Manifold loop with dedicated flow control valve stations to each mixing chamber*	Manifold loop with dedicated flow control valve stations dedicated to each storm pump.*	*Pressurized recirculation loop feeding flow control valves. Evaluated during conceptual design and during Jacobs CS-299 project.
		5	Chemical Piping	Polyethylene:

*fused joint with flanged joints at equipment (i.e., no glued joints) *Chem Proline®pipe by Asahi/America or Equal

*Based on input from GLWA plumbers and products they've used	Sch 80 PVC -
*flanged or glued joints only	Sch 80 PVC -
*flanged or glued joints only	Flanges joints at all equipment
		6	Chemical Valves, Isolation	Vented Ball Valves -

-Sch 80 PVC -True Union Joints Vented Ball Valves - -Sch 80 PVC -True Union Joints Vented Ball Valves - -Sch 80 PVC -True Union Joints

7	Chemical Valves, Throttling/Flow Control	Diaphragm Valve or Globe Valve	Materials of construction will be chemically compatible with application.
8	Chemical Mixing	Induction mixers -

*Gas Mastrrr Mixers (No Water Champ per GLWA).

*Explosion proof motors for hazardous areas *oil reservoirs to maintain seals during intermittent operation Induction mixers - *Gas Mastrrr Mixers (No Water Champ per GLWA).

*Explosion proof motors for hazardous areas

*oil reservoirs to maintain seals during intermittent operation	Injection ring on discharge piping of each storm pump.	At STA Hazen is evaluating the use of Gas Masterrr's NV type mixer for Prechlor location.
		9	Chlorination Control Strategy	*Manual

*Flow Pacing with dose set point

*The primary disinfection control strategy operating mode will be TRC mode.	Manual; Flow Pacing w/ dose set point; ICT with TRC feedback; Machine Learning	Manual; Flow Pacing w/ dose set point; ICT with TRC feedback; Machine Learning
		10	TRC Analyzer	Colorimetric (Swan or equal)	Colorimetric (Swan)	Colorimetric (Swan)	Recommendation based on GLWA's pilot experience and feedback from Macomb County's experience. Also amperometric style (Reagentless) can become saturated, resulting in control reliability issues.

&"-,Bold"&14EOWC Water Treatment and Supply Program Action Item Log &D

&P of &N

Draft All CSOs

GLWA CSO Facilities Design Coordination

Item No.

Description

Preliminary Recommendation

Comments / Notes

Baby Creek SDF (BC)

Belle Isle RTB (BLI)

Conner Creek RTB (CON)

Hubbell Southfield RTB (HS)

Leib CSO

Oakwood CSO

Puritan Fenkell RTB (PF)

Seven Mile RTB (SM)

St. Aubin SDF (STA)

Screening

Screen Technology

Romag

Not part of scope (existing screens are perf. Plate technology)

Romag

(Rehab Existing)

BLI

Screen Clogging Mitigation

Adding spray bars on backside of screens to mitigate build up of solids in trough

Disinfection

Chemical Storage Tank

FRP (RTP-1 Certified)

CON

Chemical Pump Technology

Centrifugal seal less, magnetic drive pumps

Feed pump discharge configuration (e.g. manifold loop like CON, BC) vs. dedicated pump per mixing chamber)

Manifold loop with dedicated flow control valve stations to each mixing chamber*

Manifold loop with dedicated flow control valve stations dedicated to each storm pump.*

Manifold loop with dedicated flow control valve stations to each mixing chamber*

*Pressurized recirculation loop feeding flow control valves. Evaluated during conceptual design and during Jacobs CS-299 project.

LEIB

Chemical Piping

Sch 80 PVC -

*flanged or glued joints only

Sch 80 PVC -

*flanged or glued joints only

Polyethylene:

*fused joint with flanged joints at equipment (i.e., no glued joints) *Chem Proline®pipe by Asahi/America or Equal

*Based on input from GLWA plumbers and products they've used	Need to update pipe type and joints. Recently GLWA O&M staff requested fused joint piping.			OKW
		7	Chemical Valves, Isolation		Vented Ball Valves -

-Sch 80 PVC -True Union Joints Vented Ball Valves - -Sch 80 PVC -True Union Joints Vented Ball Valves - -Sch 80 PVC

-True Union Joints or flanged			PF
	8	Chemical Valves, Throttling/Flow Control			Diaphragm Valves	Materials of construction will be chemically compatible with application.	SM
	9	Chemical Mixing		Induction mixers -

*Gas Mastrrr Mixers (No Water Champ per GLWA).

*Explosion proof motors for hazardous areas *oil reservoirs to maintain seals during intermittent operation Injection ring on discharge piping of each storm pump. Induction mixers - *Gas Mastrrr Mixers (No Water Champ per GLWA).

*Explosion proof motors for hazardous areas

*oil reservoirs to maintain seals during intermittent operation	At STA Hazen is evaluating the use of Gas Masterrr's NV type mixer for Prechlor location.			STA
		10	Chlorination Control Strategy		Manual; Flow Pacing w/ dose set point; ICT with TRC feedback; Machine Learning	Manual; Flow Pacing w/ dose set point; ICT with TRC feedback; Machine Learning	*Manual

*Flow Pacing with dose set point *The primary disinfection control strategy operating mode will be TRC mode.

TRC Analyzer

Colorimetric (Swan)

Colorimetric (Swan or equal)

Recommendation based on GLWA's pilot experience and feedback from Macomb County's experience. Also amperometric style (Reagentless) can become saturated, resulting in control reliability issues.

Automatic Filter System (upstream of TRC Analyzer)

S.P. Kinney Model AP

Chemical Unloading Station

Does GLWA have a preference such as a certain existing installation to mimic or certain parameters that they would like monitored and displayed on control panel and/or Ovation?

Odor Control

Flushing & Dewatering

HVAC

Electrical

Will replace all buckets for MCCs

Site

Architectural

Architectural Rehabilitation - address architectural deficiencies

2200061 - Architectural Rehab

Safety

Fall Protection

2200061 - Fall protection for ladders, hatches, etc. (ALL 9 CSOs)

Hatch Lift Assist

2200061 - Replace lift cylinders for hatches or replaces hatches new (All 9 CSOs)

Will upgrade plates over dewatering pumps to be lift assisted hatches

Supporting Infrastructure

O&M Needs

GLWA CSO Facilities Design Coordination

Item No.

Description

Comments / Notes

Baby Creek SDF (BC)

Belle Isle RTB (BLI)

Conner Creek RTB (CON)

Hubbell Southfield RTB (HS)

Leib CSO

Oakwood CSO

Puritan Fenkell RTB (PF)

Seven Mile RTB (SM)

St. Aubin SDF (STA)

Screening

Screen Technology

Disinfection

Chemical Storage Tank

Chemical Pump Technology

Feed pump discharge configuration (e.g. manifold loop like CON, BC) vs. dedicated pump per mixing chamber)

Chemical Piping

Chemical Valves, Isolation

Chemical Valves, Throttling/Flow Control

Chemical Mixing

Chlorination Control Strategy

TRC Analyzer

Automatic Filter System (upstream of TRC Analyzer)

Chemical Unloading Station

Odor Control

Flushing & Dewatering

HVAC

Electrical

Site

Architectural

Architectural Rehabilitation - address architectural deficiencies

Safety

Fall Protection

Hatch Lift Assist

Supporting Infrastructure

Add'l Coordination

Item No.	Description	Preliminary Recommendation (if applicable)			Comments / Notes
		St. Aubin SDF (STA)	Leib CSO	Oakwood CSO
	Influent Sampling	TSS	Multiparameter	Multiparemeter
	Romag Screen Flushing		Pipe w/ orifice
	Various Hatch work				Coordinate timing & document updates
	Various floor coatings				Coordinate timing & document updates

Key TMs

270010 - Leib/ OKW
No.	Name	Link
18	Chlorine Dose Response Results and ICT Model	Wastewater Engineering - TM-18 Chlorine Dose Response Results and ICT Model.pdf - All Documents (sharepoint.com)
270006 - STA
1A	Screning Evaluation	2200061 R-Task 2-001A-TM1A-STA Screen Eval_Draft.pdf
BODR	Basis of Design	2200061_GLWA_CSO Improvements_30% BODR.pdf

../../../../../../../Forms/AllItems.aspx?csf=1&web=1&e=4zYQPL&cid=435fda2f%2D5a28%2D47db%2Da69c%2D6fea789d36f2&FolderCTID=0x012000DD88D4A64B39D442B43B0EBC05FE878F&id=%2Fsites%2FCSOControlProgram%2FShared%20Documents%2FGeneral%2FWWE%2F001%20PROJ%2FCSO%2F%5FMULTI%2FCIP270004%20%2D%202101475%20%2D%20OKW%2C%20Leib%20Imp%2C%20CON%20%26%20BC%20CFD%20%28DES%29%2F06%20Deliverables%2FTask%20B%20%2D%20Concep%20DES%2FTMs%2FFinal%20TM%27s%2FTM%2D18%20Chlorine%20Dose%20Response%20Results%20and%20ICT%20Model%2Epdf&parent=%2Fsites%2FCSOControlProgram%2FShared%20Documents%2FGeneral%2FWWE%2F001%20PROJ%2FCSO%2F%5FMULTI%2FCIP270004%20%2D%202101475%20%2D%20OKW%2C%20Leib%20Imp%2C%20CON%20%26%20BC%20CFD%20%28DES%29%2F06%20Deliverables%2FTask%20B%20%2D%20Concep%20DES%2FTMs%2FFinal%20TM%27s../../../../../../../../../../../../../../../../:b:/s/CSOControlProgram/Ee97j6uv4m1Eqtn0k6Zu5DIB6KZTqMOb2fIYXRJQUYoYDA?e=dtBxCE../../../../../../../../../../../../../../../../:b:/s/CSOControlProgram/Eb-CJg6KVp9AoUsM8AoZZxsBXMCrFZ8ufORMQ3I6nUz3uw?e=YNjj1H image1.png

File details come from the government source that posted it. Updated Jun 2, 2026.