Public Works Committee (Meets 1st Thursday of each month at 5:00 p.m.)

PUBLIC WORKS COMMITTEE Agenda Thursday, August 1, 2024 – 5:00 p.m. Government Center Room 204 Virtual Meeting Link Meeting ID: 213 900 972 035 Passcode: W8wabZ Call in Option: +1 (872) 242-8028 Phone Conference ID: 361 500 695# MISSION STATEMENT:“To serve as an advisory to the Superior Common Council, Departments of the City of Superior and the citizens of the City of Superior in matters of public concern under Wisconsin State Statute 62.14 and City Code 2-311.” COMMITTEE MEMBERS: Jenny Van Sickle, Ruth Ludwig, Nick Ledin, Tylor Elm 1. ROLL CALL 2. APPROVAL OF MINUTES 2.1. Public Works Committee (Meeting held July 9, 2024) 3. PRESENTATIONS 3.1. Presentation regarding ESD’s Rain Barrel Workshop. 4. OLD BUSINESS 4.1. Update on Lead Service Lines with a representative from SWL&P. 4.2. Update on the Food/Waste Composing Program. 4.3. Discuss traffic concerns near North 18th Street and Hughitt Avenue. 4.4. Discuss traffic concerns near North 59th Street and Banks Avenue. 5. NEW BUSINESS 5.1. Discuss Sidewalk Elimination Request near 5428 Cumming Avenue. 5.2. Recommendation to adjust the 2024 Wastewater CIP Priorities to fund urgent digester draft tube mixer repairs. 5.3. Recommendation to award HydraTech for the repair of draft tube mixes in the amount of $30,060.00. 5.4. Recommendation to award Short Elliot Hendrickson for engineering services for CSTP 6 partial building removal in the amount of $70,500.00. 6. RECURRING BUSINESS 6.1. ESD Director’s Update 6.2. Director’s Update 6.3. Future Agenda Items 6.4. Confirm the next meeting date of September 5, 2024, at 5:00 PM of the Government Center. 7. ADJOURNMENT Notice is hereby given that a majority of the members of the Common Council may be present at the meeting, and although this may constitute a quorum of the Common Council, the Council will not take any action at this meeting. ********************************************************************************************* Pursuant to the Americans with Disabilities Act of 1990, if you are in need of an accommodation to participate in the public meeting process, please call (715) 395-7200 by 4:30 p.m. on the day prior to the scheduled meeting date (OR dial 711 for Telecommunications Relay Service). The City will attempt to accommodate any request depending on the amount of notice received. ********************************************************************************************* In compliance with Wisconsin Open Meetings Law, this agenda was posted on 7/26/2024 at the following locations: Superior Government Center, Superior Public Library, and online at https://www.ci.superior.wi.us/agendacenter. It was also emailed the Superior Telegram. PUBLIC WORKS COMMITTEE – 8/01/24 Meeting Page 1 of 1 PUBLIC WORKS COMMITTEE MINUTES July 9, 2024 Regular Meeting The meeting was called to order by Councilor Van Sickle at 5:00 p.m. on July 9, 2024, in Government Center Room 204. COMMITTEE MEMBERS: Jenny Van Sickle, Ruth Ludwig, Nick Ledin, Tylor Elm (alt) 1. ROLL CALL Members Present: Jenny Van Sickle, Ruth Ludwig, Tylor Elm City Staff Present: Todd Janigo, Chris Carlson, Kara Czapinski, Collin Voge, Thor Trone, Steve Roberts*, Mayor Paine Others Present: Shelley Nelson, Tim Meyers, Justin Fleck 2. APPROVAL OF MINUTES 2.1. Public Works Committee (Meeting held June 6, 2024) MOTION by Ludwig, second by Elm and carried to approve the minutes from June 6, 2024. 3. PRESENTATIONS 3.1. Presentation by Meyer Group Architecture on the results of the Municipal Services Building Improvements Phase II Space Needs and Concept Design Project. Tim Meyer, the proprietor of Meyer Group Architecture, delivered a concise presentation on the findings of the Municipal Services Building Phase II study. The analysis involved a thorough examination of spatial requirements based on current staffing levels, as well as assessments of accessibility, mechanical and electrical systems, and recommendations for addressing identified needs. The project aims to redesign the layout to accommodate all divisions, foster collaboration, ensure ADA compliance, upgrade mechanical systems for efficiency and air quality, and enhance the electrical system. Employee surveys highlighted the need for a public entrance, secure access doors, improved accessibility, meeting and training spaces, and various other adjustments. Recommendations include resizing the wash bay, addressing drainage issues, adding storage areas, enhancing security with access controls, and defining the public entry. The estimated project cost is $6,500,000, with further work needed to obtain accurate estimates from commercial contractors in the city. Tim Meyers and Justin Fleck left the meeting at 5:38 p.m. 4. OLD BUSINESS PUBLIC WORKS COMMITTEE – 7/09/2024 Meeting (Meets monthly on 1st Thursday at 5 p.m.) Page 1 of 4 *Attended virtually 5. NEW BUSINESS 5.1. Discuss traffic concerns near North 59th Street and Banks Avenue. Lieutenant Trone visited the site today and retrieved crash data from the past seven years, revealing only three accidents in the vicinity. The presence of boulevard trees in the area might be obstructing visibility, prompting the Parks, Recreation, and Forestry Department to inspect the trees. Councilor Van Sickle will forward the ring camera footage, provided by a concerned citizen in the neighborhood, to Lieutenant Trone. Councilor Ludwig proposed the idea of reducing speed limits or adding more stop signs at uncontrolled intersections due to the prevalent issue of speeding throughout the city. Committee members deliberated on the installation of two-way stop signs at North 59th Street and Banks Avenue, as well as at Oakes Avenue and North 60th Street, which will be further discussed in the upcoming August meeting. Mayor Paine joined the meeting at 5:46 p.m. Lieutenant Trone left the meeting at 6:07 p.m. 5.2. Review No Mow May. Councilor Ludwig reviewed the history of No Mow May, which was introduced in the City of Superior in 2017. The wet and early spring this year resulted in numerous challenges regarding tall grass, leading to a decision to modify the resolution to slow mow summer, allowing the grass to grow to 6 inches before mowing it down to 4 inches based on weather conditions. Collin Voge highlighted the challenges of maintaining the grass due to the early spring and heavy rain, while Director Cadotte suggested visiting the Minnesota Landscape Arboretum and Bee Lab for further research on creating pollinator habitat. It was agreed that Councilor Ludwig will make amendments to the resolution and continue the discussion in the August meeting. Mayor Paine left the meeting at 6:34 p.m. Linda Cadotte and Collin Voge left the meeting at 6:36 p.m. 5.3. Recommendation to waive the bidding requirements and approve the purchase of one Primary Tank Settling Sludge Cross Collector Drive in the amount of $89,949.59 from Evoqua Water Technologies. Director Roberts identified an error in the agenda item, specifying that the purchase should be for two primary tank settling sludge cross collector drives, not one, with a total cost of $89,949.59 for both units. Upon inspection, it was discovered that the gearboxes driving the sludge collectors were malfunctioning during tank cleaning. Despite considering replacing the entire sludge collection system, it was decided that the sludge conveyors are in good condition and can continue to function for many more years without replacement. PUBLIC WORKS COMMITTEE – 7/09/2024 Meeting (Meets monthly on 1st Thursday at 5 p.m.) Page 2 of 4 *Attended virtually  The decision to reuse the existing operational equipment was considered the most efficient way forward. The maintenance team is confident in its durability and longevity. They plan to install the replacement parts themselves instead of outsourcing the task. The committee members agreed to update item 5.3 to reflect the purchase of two units instead of one. MOTION by Elm, second by Ludwig and carried to waive the bidding requirements and approve the purchase of two Primary Tank Settling Sludge Cross Collector Drive in the amount of $89,949.59 from Evoqua Water Technologies. 5.4. Recommendation to award Fahrner Asphalt Sealers for the East 2nd Street Crack Sealing Project in the amount of $338,814.00. Director Janigo explained that due to East 2nd Street being a concrete roadway with an asphalt overlay, reflective cracking is anticipated at the concrete joints in the pavement. To address this issue, crack sealing will be conducted to open and fill the cracks with a hot asphalt crack sealer, preventing moisture from causing damage to the pavement. Additionally, sealing the pavement will reduce the amount of winter deicing chemicals by preventing them from penetrating the pavement. After comparing prices with similar projects in Wisconsin and Minnesota, it was determined that the proposed cost was competitive and fair. Fahrner Asphalt Sealers aim to start the project post-Labor Day with completion within two weeks if traffic conditions allow. MOTION by Elm, second by Ludwig and carried to award Fahrner Asphalt Sealers for the East 2nd Street Crack Sealing Project in the amount of $338,814.00. 5.5. Notice of Fleet Vehicle Auction Removals - Received and filed. 6. RECURRING BUSINESS 6.1 ESD Director’s Update – Received and filed. 6.2 Director Update - 6.2.1 Dick Campbell, the Plumbing Inspector for the city is retiring at the end of the month. Repeated advertising of the position has not resulted in a suitable candidate for the position. The city is collaborating with REM Inspecting as well as supporting an existing city inspector who is preparing to take the Residential Plumbing Inspector test in order to cover residential plumbing permitting and inspection. Commercial inspections will fall to the State of Wisconsin Department of Safety and Professional Services. 6.2.2 Progress on the Hammond Avenue Project is expected to resume with the arrival of drier weather conditions, which previously caused delays due to wet weather. 6.2.3 Culverts are currently being installed on 39th Avenue East and are expected to be completed in the next few weeks. Once everything is filled and graded, the paving process will begin. PUBLIC WORKS COMMITTEE – 7/09/2024 Meeting (Meets monthly on 1st Thursday at 5 p.m.) Page 3 of 4 *Attended virtually  6.2.4 The sidewalk program is slightly delayed, currently running a couple weeks behind schedule. Sir-Lines-A-Lot has finished the initial round of line painting, and the LED lights are expected to be delivered soon. 6.3 Future Agenda Items 6.3.1 Discuss traffic concerns near North 18th Street and Hughitt Avenue. 6.3.2 Discuss traffic concerns near North 59th Street and Banks Avenue. 6.3.3 Review No Mow May Resolution. 6.3.4 Discuss electronic feedback signs. 6.4 Confirm the next meeting date of Thursday, August 1, 2024, at 5:00 p.m. in Room 204 of the Government Center. 7. ADJOURNMENT Councilor Van Sickle announced the meeting adjourned at 7:05 p.m. Respectfully submitted by Kara Czapinski PUBLIC WORKS COMMITTEE – 7/09/2024 Meeting (Meets monthly on 1st Thursday at 5 p.m.) Page 4 of 4 *Attended virtually  Sidewalk Elimination Criteria Checklist: For Administrative Use Only 1. Is the sidewalk in ADA compliance? YES___ NO_X_ 2. Is the sidewalk on, or near a Safe Routes to School route? YES___ NO_X_ 3. Is the sidewalk part of the City of Superior Active Transportation Plan? YES___ NO_X_ 4. Is the sidewalk within 6 blocks of a school, or hospital? YES___ NO_X_ 5. Is the sidewalk on a bus route? YES___ NO_X_ 6. Is the sidewalk a full block? YES___ NO_X_ 7. Does the sidewalk connect to existing adjacent sidewalks? YES_X_ NO___  Environmental Services Division Public Works Department Phone: (715) 394-0392 Ext. 1034 Director of Environmental Services Fax: (715) 394-0406 Steve Roberts E-mail: robertss@ci.superiorwi.gov 51 E 1st Street Website: www.superior.wi.gov Superior, WI 54880 Memorandum of Recommendation DATE: July 26, 2024 TO: Mayor Jim Paine and the Common Council FROM: Steve Roberts and Mark Simmonds RE: Recommendation to Adjust the 2024 Wastewater CIP Priorities to Fund Urgent Digester Draft Tube Mixer Repairs It is the recommendation of the Environmental Services Division to adjust the 2024 Wastewater CIP priorities to provide funding for urgent structural reinforcement to digester draft tube mixers. 1. Background/Analysis/Discussion: The wastewater treatment plant sludge digestion system was originally constructed in 1956. Co-settled raw primary sludge and waste activated solids are pumped to two digesters, each with approximately 400,000 gallons of volume. The digesters operated in series where anaerobic microbes break down organic matter and stabilize the solids. The majority of the breakdown and stabilization occurs in the Digester 1 (the “primary digester”) and further breakdown occurs in the secondary digester. Boilers, typically fueled by gas produced through the digestion process, are used to maintain a temperature of approximately 100 degrees Fahrenheit to provide the optimal temperature for solids breakdown and stabilization by the anaerobic microbes. External draft tube mixers were installed in 2008 to replace nonfunctional digester mixing equipment to provide mixing for the primary digester and meet code requirements necessary to be classified as a “Well Mixed” digester. For context, “Well Mixed” digesters are rated at double the effective capacity of “Moderately Mixed” digesters and unmixed digesters are not considered effective for breakdown and stabilization of wastewater sludge. Digested solids are fed from the secondary digester to a filter press and dewatered prior to disposal at the landfill. A pinhole leak from one of the draft tube mixers was discovered in June. The leak was slow enough that the volume was retained in a concrete containment area at the base of the mixer. A patch has been applied to plug the leak. The remaining wall thickness was measured during evaluation of potential repair by welding an additional layer of metal over the area where the leak developed. According to that analysis approximately 70% of the original pipe thickness has eroded or corroded away. In a worst-case scenario, a hole in the draft tube could result in a loss of containment (spilling) of the contents of the primary digester. In addition to the mess & related cleanup, such a spill would likely be deemed an “overflow” in violation of the permit and would render the primary digester inoperable until a structural repair is made. It is necessary to replace the draft tubes or provide a structural repair to mitigate that risk. 2. Budget Source/Fiscal Impact: Excessive thinning of the external draft tube metal was not expected to occur under normal operation and was unknown at the time of budget preparation. The budget funds in the CIP contingency allocation were allocated to a repair/replacement of primary sludge cross collector equipment. It is proposed to adjust the CIP priorities to provide funding for repairs by  postponing the purchase of additional “Solar Powered Mixers for Combined Sewer Treatment Plant 2” until 2025. We were advised that an enhancement to that equipment (related to control boards and/or motors) is expected to occur in the “near future”. Delaying that purchase at this time provides the benefit of providing budgeted funds to proceed with the urgent repairs and the opportunity to procure the enhanced solar mixers. The $225,000 allocation for solar mixers is significantly greater than the amount needed to complete work on the draft tube mixers. 3. Conclusion: It is the recommendation of the Environmental Services Division to Adjust the 2024 Wastewater CIP priorities by postponing the purchase of additional solar mixers to make funds available for the urgent repair of draft tube mixers in 2024. Recommendation Approved: _________________________________________ Date: ____________ Mayor Jim Paine Recommendation Denied: ____________________________________________ Date: ____________ Mayor Jim Paine SR/sr C: Todd Janigo, Chris Carlson, Jon Shamla, Mark Simmonds, Jane Darwin Enclosure: Structural Repair Quote  Environmental Services Division Public Works Department Phone: (715) 394-0392 Ext. 1034 Director of Environmental Services Fax: (715) 394-0406 Steve Roberts E-mail: robertss@ci.superiorwi.gov 51 E 1st Street Website: www.superior.wi.gov Superior, WI 54880 Memorandum of Recommendation DATE: July 26, 2024 TO: Mayor Jim Paine and the Common Council FROM: Steve Roberts and Mark Simmonds RE: Recommendation Award Repair of Draft Tube Mixers 1. Background/Analysis/Discussion: The wastewater treatment plant sludge digestion system was originally constructed in 1956. Co-settled raw primary sludge and waste activated solids are pumped to two digesters, each with approximately 400,000 gallons of volume. The digesters operated in series where anaerobic microbes break down organic matter and stabilize the solids. The majority of the breakdown and stabilization occurs in the Digester 1 (the “primary digester”) and further breakdown occurs in the secondary digester. Boilers, typically fueled by gas produced through the digestion process, are used to maintain a temperature of approximately 100 degrees Fahrenheit to provide the optimal temperature for solids breakdown and stabilization by the anaerobic microbes. External draft tube mixers were installed in 2008 to replace nonfunctional digester mixing equipment to provide mixing for the primary digester and meet code requirements necessary to be classified as a “Well Mixed” digester. For context, “Well Mixed” digesters are rated at double the effective capacity of “Moderately Mixed” digesters and unmixed digesters are not considered effective for breakdown and stabilization of wastewater sludge. Digested solids are fed from the secondary digester to a filter press and dewatered prior to disposal at the landfill. A pinhole leak from one of the draft tube mixers was discovered in June. The leak was slow enough that the volume was retained in a concrete containment area at the base of the mixer. A patch has been applied to plug the leak. The remaining wall thickness was measured during evaluation of potential repair by welding an additional layer of metal over the area where the leak developed. According to that analysis approximately 70% of the original pipe thickness has eroded or corroded away. In a worst-case scenario, a hole in the draft tube could result in a loss of containment (spilling) of the contents of the primary digester. In addition to the mess & related cleanup, such a spill would likely be deemed an “overflow” in violation of the permit and would render the primary digester inoperable until a structural repair is made. It is necessary to replace the draft tubes or provide a structural repair to mitigate that risk. 2. Budget Source/Fiscal Impact: The proposed source of funds for this work is the Wastewater Enterprise Fund CIP, with priorities adjusted to make funds available to proceed in 2024. 3. Alternatives a. Do Nothing: Given the loss of pipe wall thickness and potential for loss of containment of the digester contents and violation of the wastewater permit. It is foreseeable that it may be necessary to take the primary digester offline until a repair can be budgeted and completed. This will  significantly degrade the performance of solids digestion and would be expected to result in an increased cost of operation that exceed the cost of repair. For these reasons, this is not the recommended alternative. b. Provide Additional Metal Cladding Over the Existing Metal Draft Tubes: A quote from Stack Bros was sought to provide additional metal cladding in the area of the pinhole leak. During evaluation of this approach, it was determined that the existing metal draft tubes did not have sufficient structural integrity for this to be a feasible method of repair. Therefore, this is not the recommended alternative. c. Replace the Draft Tubes: A quote to replace the draft tubes mixers was requested from Ovivo Water to replace the draft tube mixers. This approach would require taking the digester offline and removing the sludge to accommodate the replacement. The sludge removal effort would either be performed by City staff or contracted out. Self-performing the work is typically a multiple month effort and costs for contracting digester cleaning would greatly exceed the cost of alternative repair methods. As of 7/25, a quote has not yet been received. For those reasons, this is not the recommended alternative. d. Repair the Draft Tubes with Enecon DuraWrap: Enecon DuraWrap provides a structural carbon fiber repair applied to the exterior of the existing draft tube mixers. This work can be performed without taking the digester offline. The quote from Corrosion Control Resource to install Durawrap has a cost of $34,220. Although not the recommended alternative based on cost, it is noteworthy that a 5-year warranty is included for this repair alternative. e. Repair the Draft Tubes with HydraWrap CRFP: HydraWrap CFRP provides a structural carbon fiber repair applied to the exterior of the existing draft tube mixers. This work can be performed without taking the digester offline. The quote from HydraTech Field Services to install HydraWrap is the lowest cost proposal to complete the repair. Therefore, awarding the repair to HydraTech for $30,060 is the recommended alternative. 4. Conclusion: It is the recommendation of the Environmental Services Division to award the repair to HydraTech for $30,060. Recommendation Approved: _________________________________________ Date: ____________ Mayor Jim Paine Recommendation Denied: ____________________________________________ Date: ____________ Mayor Jim Paine SR/sr C: Todd Janigo, Chris Carlson, Jon Shamla, Mark Simmonds, Jane Darwin Enclosure: Structural Repair Quote  10448 Chester Road Cincinnati, Ohio 45215 Phone: (513) 827-9169 Fax: (513) 827-9171 July 25, 2024 Proposal No. 071624-SUPERIOR-MPFr1 Mark Simmonds Operations and Maintenance Supervisor Environmental Services Division of Public Works 51 East 1st Street Superior, WI 54880 (715) 394-0392 Ext. 1047 Subject: Rehabilitation of Digesters with HydraWrap FRP Unit Item Description Quantity Units Price Price Furnish materials, labor, and equipment to install two (2) 36 FT $ 835.00 $ 30,060.00 layers HydraWrap FRP on two vertical digester pipes. Each digester is 27.5” diameter and approximately 18 ft in length. One Mobilization included. Total: $ 30,060.00 Scope of Work The following provides a detailed outline of the services to be performed by HydraTech for the installation of the HydraWrap FRP: 1. One mobilization is included. Additional mobilizations required due to activities or schedule which delay or interrupt installation will be invoiced at $ 4,900.00 2. Perform all necessary surface preparation on the steel pipe surfaces. Abrasive blasting and/or power tool cleaning. 3. Provide scaffolding, manlifts, or similar means to access area of repairs. Assumption that access is available to the digester pipes to enable the use of manlifts and/or scaffolding. 4. Containment of abrasive blast media to best practice available. Clean up of abrasive blast media to best practice available. 5. No UV stable top coat is included. Digester pipe to be insulated ( by purchaser ) after HydraWrap is installed. Exclusions / Responsibilities of Others / Clarifications: • Work is to be performed only during periods when temperatures are suitable for the application of the HydraWrap system. HydraTech Field Services LLC will not be required to perform work at any time when environmental conditions are not acceptable for application. Equipment, supplies, and tools for implementing environmental controls is not included in HydraTech’s proposal. Environmental control (temperature, humidity, etc ) if required would be invoiced at an additional cost. 071624-SUPERIOR-MPF  10448 Chester Road Cincinnati, Ohio 45215 Phone: (513) 827-9169 Fax: (513) 827-9171 • HydraTech reserves the right to use sub contractors as needed. HydraTech will have own work force presence or representative at all time. • Purchaser to remove and/or replace any insulation, piping, conduit, or similar utility that interferes with installation of the HydraWrap FRP. • Purchaser is responsible for any third-party testing. • Purchaser shall provide a staging area for any equipment necessary for this work within 100 feet of work site. • Pricing does NOT include prevailing wages or wages mandates by state, county or local jurisdiction. • Pricing is based on information at time of quote. Additional information obtained after bid date or changes in site conditions prior to beginning work may require changes in pricing. • Purchaser is responsible for all required permits. • Price is based on the current limits of liability of HydraTech Field Services. Additional insurance requirements may constitute a change in price. • Purchaser is responsible for installing insulation after the HydraWrap has been installed. • Purchaser is responsible for re-installing any utility ( piping, conduit, etc. ) previously removed to allow installation of the HydraWrap FRP. • Purchaser to provide access to the jobsite for a minimum of 8 hours per day, 7 days per week. • Purchaser shall allow for use of restrooms on site. Schedule HydraTech Field Services LLC requires a three (3) week minimum notice prior to the start of this work. Pricing & Terms All out of scope work or delays will be billed at $350.00 per crew hour on site. 3% will be added if bonding is required. Payment Terms: Balance is net 30 days from date of completion. Please contact HydraTech Engineered Products, LLC / HydraTech Field Services at 513-827-9169 if there are questions or desire additional information regarding this proposal. Thank you for the opportunity to work with your organization. Michael Fox HydraTech Engineered Products, LLC 071624-SUPERIOR-MPF  10448 Chester Road Cincinnati, Ohio 45215 Phone: (513) 827-9169 Fax: (513) 827-9171 cc: Peter Blais, Jennifer Williams, Mike Albert, Client File 071624-SUPERIOR-MPF  Environmental Services Division Public Works Department Phone: (715) 394-0392 Ext. 1034 Director of Environmental Services Fax: (715) 394-0406 Steve Roberts E-mail: robertss@ci.superior.wi.us 51 E 1st Street Website: www.ci.superior.wi.us Superior, WI 54880 Memorandum of Recommendation DATE: July 25, 2024 TO: Mayor Jim Paine and the Common Council FROM: Steve Roberts and Mark Unger RE: Memorandum of Recommendation Engineering Services for CSTP 5 and 6 Facility Improvements – CSTP 6 Partial Building Removal 1. Introduction: In April of this year, ESD initiated an engineering effort with SEH with the intent to perform structural review and alternatives evaluation at ESD’s two remote auxiliary treatment plants, referred to as Combined Sewer Treatment Plants (CSTP’s) 5 & 6. The main objective of the project is to identify alternatives for structural rehabilitation of the buildings, interior ventilation and electrical improvements, solar power systems, disinfection systems, and potentially new treatment processes. 2. Background/Analysis/Discussion: During the project kickoff site visit, the lead structural engineer expressed concern regarding the structural integrity of a portion of the existing building at CSTP 6. Following the site visit, SEH issued a Structural Safety Letter to ESD indicating that the building is in an unsafe condition and should not be occupied within the area of concern. ESD has followed the guidance issued in the letter and has blocked off portions of the building identified to be unsafe for occupancy. Based on the elevated need to address structural deficiecis at CSTP 6, ESD requested a letter proposal for assitance with the design, bidding, and construction related services to provide short-term support of the structure. The plan identified coming out of that effort includes partial building removal and the construction of a temporary wall to enclose the remainig buidling footprint. The area of the building most affected is directly overtop existing tankage used during facility operations. In communication with the DNR, it was identified that an existing pipe segment within the building could be used to direct process flows around the existing tankage within the building. This provides opportunity to perform the partial building removal without disrupting the ability of the facility to operate if needed. It’s important to note that the main element of the existing project was to address structural concerns with the CSTP buildings. A facilty plan effort initiated a decade ago performed similar sturctural analysis and at that time the concept of removing a portion of the building was indenfied (incorporated into bid documents for the existing project). At that time, there was visual deterioration but no imanent concern regarding structural integrity. The partial building removal proposed in the current project is in alignment with the proposed approach identied years ago. Due to the recent rate of deterioration and now structural concern, the proposed partial building removal is being brought forward as a stand-alone item. The evaluation of the remaining project alternatives is still ongoing, and the plan still remains to bring those proposed alternatives forward, either independently or packaged together.  Images taken at CSTP 6: 3. Budget Source: This work will be funded by the Wastewater Enterprise Fund. An initial allocation of $250,00 was included in the budget for this project. The current contract for alternatives evaluation is $97,100. The proposed cost for detailed design and construction related services to remove a portion of the building is $70,500. 4. Alternatives: a. Pursue Engineering Services: Multiple options to address the structural deficiency were identified and reviewed by SEH. Ideas surrounding the structural concern have been discussed with DNR and a proposed plan to address the structural and safety concern has been developed, therefore; this is the recommended alternative. b. Do Nothing: ESD rapidly deployed the suggestions identified in the Structural Safety Letter authored by the lead structural engineer on the project. Currently, the area surrounding the existing tankage within the building has been cordoned off and a composite sampler has been relocated outside the building so that process sampling can be preserved in the event of a facility operation. Based on the apparent structural concern and occupancy limitations, this is not the recommended alternative. 5. Conclusions: It is the recommendation of the Environmental Services Division to award the detailed design and construction related services with S.E.H. for the CSTP 6 partial building removal in an amount of $70,500. Recommendation Approved: ______________________________________________________ Mayor Jim Paine Recommendation Denied: ______________________________________________________ Mayor Jim Paine SR/mu C: Todd Janigo, Chris Carlson, Jon Shamla, Mark Simmonds, Wes Vann July 12, 2024 RE: City of Superior CSTP 5 and 6 Facility Improvements SEH No. SUPER 178644 14.00 Steve Roberts Director City of Superior ESD 51 East 1st St Superior, WI 54880 Dear Steve: As you know, SEH has been working with the City of Superior on Alternatives Analysis for CSTP 5 and 6 Facility Improvements. During our kickoff site visit, our structural engineer noted substantial deficiencies at CSTP 6 that she feels render the facility unsafe for occupation (see attached CSTP-6 Safety Letter). As directed, SEH is providing this additional services request to provide assistance with design, bidding, and construction related services to provide short-term support of the structure. Based on our understanding of the condition of the structure, we are proposing the following approach: • Bypass of the CSTP 6 settling tanks utilizing existing interior bypass piping. • Partial demolition of the CSTP 6 building – removing walls and ceiling of the portion of the building over the settling tanks. • Construction of a temporary wall to enclose the remaining building footprint. • Support of the remaining building area by either temporary shoring interior to the building, or by replacement of deteriorated masonry blocks in the exterior walls. In order to accomplish the items outlined above, we propose the following scope of services: • Design: o SEH will analyze the hydraulic capacity of the existing bypass piping in CSTP 6 that would allow flow to bypass the settling tanks. o SEH will evaluate the freeze-protection requirements for the tunnel that remains if the partial building demolition described above is accomplished. o SEH will evaluate the need for protection of settling tank equipment. o SEH will perform structural load takedown for shoring design by others, and perform structural calculations to verify overall building capacity in the final condition after demolition of roof and wall elements. Calculations will also be performed to verify capacity of the new masonry wall and existing foundation capacity to carry the new loads. Calculations will be performed for both CSTP 5 and 6. o SEH will develop demolition plans using markups of the existing record drawings of CSTP 6. o SEH will develop shoring plans for the portion of the building to remain using markups of the existing record drawings of CSTP 6 and site photos. Shoring design is by the contractor, but loads and approximate locations will be provided on SEH’s drawings to convey design intent to the contractor. o SEH will develop plans for masonry block replacement, showing typical details but not individual blocks to be replaced. Engineers | Architects | Planners | Scientists Short Elliott Hendrickson Inc., 156 High Street, Suite 300, New Richmond, WI 54017-1128 715.246.9906 | 888.881.4281 | 888.908.8166 fax | sehinc.com SEH is 100% employee-owned | Affirmative Action–Equal Opportunity Employer Steve Roberts July 12, 2024 Page 2 o SEH will develop specifications for selective building demolition, temporary shoring, masonry block replacement and other work items deemed necessary during design.  Specifications and documents will be prepared assuming that there is asbestos containing materials and hazardous materials present, with no pre-demolition assessment and testing conducted by SEH due to unsafe conditions. SEH will prepare bid documents that allow the contractor to provide deduct alternate for hazardous material testing after demolition when testing is safely able to be performed; this testing would be performed by the contractor. o SEH will detail the temporary sealant of existing roofing to help delay masonry block degradation. o SEH will include a bid alternate for performing similar stabilization of the structure at CSTP 5. While it is anticipated that the scope of demolition and shoring would be less at CSTP 5 than CSTP 6, SEH recognizes the importance of efficiencies (and cost savings) in bidding both sites at the same time. o SEH will include existing drawing markups of mechanical/electrical demolition of existing ductwork and lighting associated with the superstructure demolition. o • Bidding: o SEH will assist the City in bidding the demolition and shoring work, using the City’s standard front end bidding documents, with the temporary shoring and masonry block replacement bid as alternates. o SEH will host a mandatory prebid meeting with planholders. The prebid meeting will include an exterior tour of CSTP 6 to show site and access conditions, and an interior tour of CSTP 5 to show equivalent interior conditions. Due to the safety issues, an interior tour of CSTP 6 will not be included. o SEH will answer questions and issue addenda as needed during bidding. o SEH will assist the City in analysis of bids received, and offer a recommendation of bid award. • Construction: o SEH will host a preconstruction conference with the City and the contractor. o SEH will provide periodic onsite RPR services during the construction phase, estimated at 80 hours, which assumes one 8 hour trip per week (inclusive of travel) for a 8 week construction duration, plus two additional trips for preconstruction and punch list. RPR will be to provide construction observation, assuming detailed inspection if required will be performed by the contractor. Expenses associated with RPR time include mileage (round trip from SEH Duluth office) and per diem, if required. o SEH will answer questions and respond to contractor requests for information during the demolition and shoring process. o SEH will review contractor’s submittals including: masonry product data, epoxy product data for rebar anchorage, rebar, and shoring submittals. o SEH will review contractor’s applications for payment and make recommendations to the City. o SEH will visit the site to develop a punchlist at project completion, submit it to the contractor and visit the site again for final inspection once the contractor has indicated completion. o We assume that construction observation time related to hazardous material disposal will be performed by the contractor and not by SEH RPR. o SEH will develop record drawings. The following assumptions/exclusions apply to SEH’s proposed scope of services under this amendment: • No site survey will be required. • One detail sheet is anticipated, otherwise no drafting is required except for markups of the existing record drawings and site photos to communicate demolition and protection requirements. • Design of additional building repairs due to damage that may occur during demolition are not included. Steve Roberts July 12, 2024 Page 3 • Any necessary permits will be secured by the contractor. • Design of reinforcing of structural members if the existing structure does not have adequate capacity in the current configuration is not included. This could include reinforcing of existing walls to remain that do not have sufficient vertical or lateral capacity or reinforcing of foundation elements for the new enclosure wall. • Demolition of settling tank equipment or similar appurtenances to the building structure not specifically identified herein is not included. • Engineer’s Opinion of Probable Cost is not included. The additional lump sum fee for this amendment is as follows: -Design and Bidding: $41,900 -Construction Related Services: $28,600 -Total: $70,500 We will begin work on these additional services immediately upon receipt of a signed amendment from the City, and propose to develop the bidding documents within 60 days. We appreciate the City’s consideration of this request, and look forward to the continued work on this project. Sincerely, Jeremiah J Wendt, PE Project Manager (Lic. FL, IN, NE, SC, SD, WI, VA) x:\pt\s\super\178644\1-genl\10-setup-cont\02-contract\amendments\2024.06.24 cstp 6 additional services request.docx May 31, 2024 RE: CSTP-6 Site Visit Structural Safety Letter SUPER 178644, 42.10 Steve Roberts Director Environmental Services Division of Public Works 51 East First Street Superior, WI 54880 Dear Steve: On May 29, 2024, I visited the Superior Combined Sewage Treatment Plant (CSTP) Site #6 and performed a visual observation of the building structure. Based on my observations, the level of deterioration is such that a significant failure is possible (wall and/or roof collapse). The building is in an unsafe condition and should not be occupied. We recommend maintaining a clear buffer around the building to prevent injury or property damage in the event of a collapse. BACKGROUND The existing exterior walls are 12” single wythe concrete masonry units (CMU) with additional thickness for aesthetic purposes (“break-off block” in Figure 1 below) laid in a stack bond pattern. Deterioration of the “break-off block” is not a structural concern (although degradation of this piece will continue to the structural portion). Deterioration of the 12” structural portion of CMU is cause for concern and reduces the capacity of the wall to resist both gravity and lateral loads. Figure 1 – Existing Drawing Detail Engineers | Architects | Planners | Scientists Short Elliott Hendrickson Inc., 3535 Vadnais Center Drive, St. Paul, MN 55110-3507 651.490.2000 | 800.325.2055 | 888.908.8166 fax | sehinc.com SEH is 100% employee-owned | Affirmative Action–Equal Opportunity Employer Steve Roberts May 31, 2024 Page 2 Single wythe construction is susceptible to degradation when saturated concrete masonry is exposed to large numbers of freeze-thaw cycles on the exterior surface. In wet interior environments without a functioning vapor barrier, like the treatment room, vapor pressure drives moisture through the concrete masonry walls. DETAILED INFORMATION BY BUILDING AREA The building has three distinct areas of precast concrete roof structure: 1) Treatment room area (Figure 2 in red): Load-bearing walls are the north and south exterior walls and the garage interior wall (formerly chem room). a. The south exterior wall was in the worst condition (see Figure 3). Depth of degradation was over 9” deep (see Figure 4), indicating only the interior face shell of CMU remains for significant portions of the wall. b. Apparent bowing of the wall was observed. c. Cracks were observed on the wall interior, as well as daylight showing through from the exterior (see Figure 5). d. The degradation of the south exterior wall can directly lead to collapse of all or portions of the red building extents. 2) Former chem room and entrance space area (Figure 2 in yellow): Load-bearing walls are the south exterior wall and interior wall (garage north wall and control room south wall). a. The garage-side of the interior bearing wall was the only interior wall with notable CMU spalling. The spalling is on the bearing-side of the short-span (garage roof) precast roof double tees (see Figure 6). b. The degradation of the interior wall can directly result in the collapse of all or portions of the yellow building extents. 3) Screen room area (Figure 2 in green): Load-bearing walls are the east exterior wall, and interior wall that separates the influent screening room from the treatment room. a. The interior walls were generally in acceptable condition, for areas not concealed by equipment or finishes. b. The exterior walls showed degradation. c. The degradation of the exterior walls can directly result in the collapse of all or portions of the green building extents. Steve Roberts May 31, 2024 Page 3 Figure 2 – Existing Roof Structure Drawing Figure 3 – Elevation of South Exterior Wall Steve Roberts May 31, 2024 Page 4 Figure 4 – Close-up of South Exterior Wall Figure 5 – Interior Cracking and Daylight Through South Exterior Wall Steve Roberts May 31, 2024 Page 5 Figure 6 – Interior Garage North Wall (Yellow area precast bearing) CONCLUSION The existing building is in an unsafe condition and should not be occupied. While an analysis of the existing structure is beyond the scope of this report, we believe that critical non-redundant portions of the existing building are not capable of safely supporting code required minimum loads. The significant deterioration of structural walls that has occurred will likely accelerate in the future unless steps are taken to repair the damaged walls. We recommend maintaining a clear buffer around the building to prevent injury or property damage in the event of a collapse. If future repairs of the damaged walls are attempted, we anticipate temporary shoring of the roof structure will be required to accomplish that work. While the majority of the severe, widespread deterioration is to the south exterior wall (see Figure 3), CMU requires the outside face shell to perform as originally designed. Re-creation of the existing load path and load takedown is required to determine how much degradation is required before all safety factors are expended. Without detailed calculation, it is reasonable to assume that any degradation of the 12” structural portion of CMU has the chance of putting occupant safety at risk, and this was observed. Steve Roberts May 31, 2024 Page 6 LIMITATIONS The assessments and recommendations in this letter are based on visual observations without removal of finish materials or destructive testing of materials. Observations were made only in areas where safe access was possible. Observations were limited to broadly identifying potential structural concerns. The assessments and recommendations in this report apply only to the specific conditions observed and documented herein. Building components were assessed based on condition and apparent original intended function. This project did not include a detailed engineering analysis or rating calculations of existing building components. However, components that appear deficient have been noted. Our services for this project have been conducted to those standards considered normal for services of this type at this time and location. No warranty, either express or implied, is intended. Let me know if you have any questions or if we can be of further assistance at 651.357.8111 or achristenson@sehinc.com. Sincerely, SHORT ELLIOTT HENDRICKSON INC. Ariel Christenson, PE (Lic. WI, MN, IN, NC, TX, VA) dmk \\sehinc.com\panzura\pzprojects\pt\s\super\178644\4-prelim-dsgn-rpts\42-insp-eval\10-struct\cstp-6 safety letter final.docx  Environmental Services Division Public Works Department Phone: (715) 394-0392 Ext. 1034 ES Director Fax: (715) 394-0406 Steve Roberts E-mail: robertss@ci.superior.wi.us 51 E 1st Street Website: www.ci.superior.wi.us Superior, WI 54880 Memorandum DATE: July 26, 2024 TO: Members of the Public Works Committee FROM: Steve Roberts RE: ESD Director’s Report for August 2024 PWC 1) Wastewater Treatment a) A total of 302.5 million gallons (MG) of treated effluent was discharged in June from the main Wastewater Treatment Plant (WWTP) and Combined Sewer Treatment Plants (CSTP) as follows: 212.1 MG @ WWTP 10.2 MG @ CSTP 5 (South Superior) 69.2 MG @ CSTP 2 (@WWTP site) 11.0 MG @ CSTP 6 (Billings Park) b) The average total suspended solids concentration (TSS) for June, Week 3 (6/15-6/21) exceeded the permit limit. Compliance with the monthly limit for TSS and for all other permit parameters was achieved. This corresponded to a one-day, dramatic increase in influent TSS impacting floc formation and settling characteristics of the microbes in aeration. This dramatic, but short-lived, shift resulted in high values for TSS for two days. Effluent quality returned to normal just as rapidly by the third day after the day of increased influent loading. Essentially a slug load of solids entered the treatment plant, briefly but significantly impacted performance, and rapidly recovered. 2) Collection System a) No sanitary overflows (SSO) occurred in the most recent reporting period (no SSOs since 5/22/24). b) No combined sewer overflows (CSOs) year to date and the record setting duration without a CSO continues to grow (since June 2018). c) Routine sewer cleaning and structure maintenance is in full swing. SR/sr C: Kara Czapinski, Todd Janigo, Chris Carlson, ESD Managers