Committee-of-the-Whole Agenda Packet - 6:45 PM

City of Oconomowoc Committee-Of-The-Whole Tuesday, February 03, 2026 - 6:45 PM City Hall - Council Chambers 174 E. Wisconsin Ave. Oconomowoc, WI 53066 (Or immediately following Utility Committee) Notice: If a person with a disability requires that the meeting be accessible or that materials at the meeting be in accessible format, call the City Clerk at least 48 hours prior to the meeting to request adequate accommodations. Tel: (262) 569-2186. 1. Call to order and confirmation of appropriate meeting notification 2. Committee Business a. Presentation of Western Sanitary Sewer Study 3. Adjourn Gina Kozlik, City Clerk City of Oconomowoc Notice is hereby given that a majority of the Common Council will be present at the above scheduled meeting to gather information about a subject over which they have decision-making responsibility. This constitutes a meeting of the Common Council pursuant to State ex rel. Badke v. Greendale Village Board, 173Wis. 2d 553, 494 N.W. 2d 408 (1993) and must be noticed as such, although the Common Council will not take any formal action at this meeting. 1 1 MEMORANDUM DEPARTMENT - WASTEWATER Date: February 3, 2026 To: Mayor and Committee of the Whole From: Tim Reel, Wastewater Operations Manager Re: Presentation of the Western Sanitary Service Area Study RELATES TO THE STRATEGIC PLAN Strategic Goal- II. Improve and Maintain our Infrastructure/Facilities BACKGROUND In continuation of our proactive planning approach towards undeveloped lands within our Sanitary Service Area, we contracted with Ruekert & Mielke in August of 2025. Goals were to provide an engineering study showing proper configuration, location and sizing of sanitary sewers in the targeted geographic areas. Additionally, it would provide both location and configuration of necessary lift stations and force mains. Lastly, cost projections were to be provided for these study areas including any alternatives investigated. The City identified two areas for this work. The first, Area 1, is approximately 764 acres of land surrounding Allen Road and Reddelien Road on the City’s western edge. The second, Area 2, is approximately 415 acres located south of Valley Road (CTH B) and east of N. Golden Lake Road. Anticipated development layout and therefore density projections were gathered through cooperation with City staff using existing design principles and current City zoning. In the report some highlights to note are: ▪ Area 1 highlights two alternatives for lift station locations. Alternative 1 appears to be the most attractive as it allows all potential development to be serviced via gravity along with greater future flexibility. ▪ Area 2 alternatives highlight the role that densities play in the infrastructure planning process and ultimately cost. The underlying consideration in this “Area” is, what types of property will develop on lands immediately north and east of the intersection of Valley Road and Concord Road. The elevation needs here may determine inclusion into the lift station planning effort. ▪ Appendix C captures anticipated costs, some of which may be initially funded by the City should a construction project be approved in the future. Items likely included in an initial effort would be the construction of the lift station, force main and associated interceptor sewer lines. Ruekert & Mielke staff will be providing exhibits and presenting their findings as part of this agenda item. All questions and comments are encouraged as part of the discussion. 2 2 FINANCIAL IMPACT N/A RECOMMENDATION N/A SUGGESTED MOTION N/A 3 ~47-10167 > Report > Reel-20260121-Southwest Sanitary Service Study~ Your Infrastructure Ally ruekertmielke.com W233 N2080 Ridgeview Parkway, Waukesha, WI 53188-1020 262-542-5733 January 21, 2026 Mr. Tim Reel Operations Manager City of Oconomowoc 900 S. Worthington St. Oconomowoc, Wisconsin 53066 Re: Western Sanitary Service Study Dear Mr. Reel: This study analyzes conceptional plans and costs for providing sewer services to two future development areas: the Reddelien Road Area, and the south of Valley Road Area. The Reddelien Road area is located on the western side of the sanitary service area, on the western boundary of Waukesha County in both the City and Town of Oconomowoc. This area is generally defined as the areas around Reddelien Road and Allen Road. There are portions of both the Town of Oconomowoc and City of Oconomowoc that were considered. The South of Valley Road Area is the area south of Valley Road and East of Concord Road. There is an additional area of study on the north side of Valley Road at its intersection with Concord Road. This area would have some interaction with the Concord Lift Station, which was studied in December of 2024 in the Southwest Service Area project. This new area was referenced within that study, but at an assumed lower density. A portion of this area (specifically the parcel north of Valley Road) was previously assessed to Concord Lift Station and was designated to flow by gravity to that station. The proposed lift station within the South of Valley Road area would likely be tributary to the existing Concord Lift Station. DESCRIPTION OF EXISTING CONDITIONS Reddelien Road Area As stated above, the Reddelien Area is loosely described as the area around the intersection of Allen Road and Reddelien Road, extending to the north and west. A map of this area is seen in Figure 1 in Appendix A. This area is largely undeveloped, with some existing low-density housing north of Allen Road, and some higher density housing southeast of the study area. There is not adequate gravity potential within the area for the new development, although existing gravity systems were considered for servicing existing houses in the low-density areas near the road intersection. The area tributary to this station would be entirely new development. With the City’s proposed layout the number of Residential Equivalent Connections (RECs) in this area is 452. South of Valley Road The South of Valley Road Area can be broken into two areas, the portion north of Valley Road, and the portion south of Valley Road. The northern portion is a smaller extension of the current developments in the Arrowood area to the north and east. This is relatively high-density single-family homes and portions of this northern portion of the study area can be serviced by the existing collection system. The system has the capacity to service the area and has been assessed to convey sewage to the station through gravity, but would need some grading rework to allow for proper cover over the flatter development area. Alternatively, on-slab construction in the northern area could also alleviate these concerns. In the southern portion, there is effectively no existing development, and would all be constructed from new. The area also has a largely flat eastern portion, with a large hill making up the western half. 4 Mr. Tim Reel City of Oconomowoc January 21, 2026 Page 2 ~47-10167 > Report > Reel-20260121-Southwest Sanitary Service Study~ Your Infrastructure Ally ruekertmielke.com With the City’s proposed layout the number of RECs in this area is 296 between the two areas. DESIGN CRITERIA Parcel layouts were provided by the City based on their initial plans to meet desired density. These layouts were projected onto contours from Waukesha county GIS and potential system layouts began. The design criteria for the layout was primarily focused on achieving gravity collection with a minimum velocity of 2 feet per second, to a single lift station within both study areas, while maintaining adequate depth to prevent the need for hung plumbing. When the layout of the sewers was completed, residential equivalency connections (RECs or households) were counted along the major sewer areas to verify that adequate capacity was available in each pipe. For the Reddelien Road Area, an assumption was made that the outfall designated by the City (Lincoln Street-Concord Road intersection) would have adequate downstream capacity for the additional flows. For the purposes of this study, that was deemed to be adequate, but further review of the collection system at that point would need to be studied when developmental extents come into more focus. For sewer capacity calculations within the study area, RECs were counted by projected lots and lot types. Lots that were designated to have higher density development (in this case, duplexes) were considered to be two RECs. The population density within these households is estimated at 2.5 residents per REC. Flowrates were extrapolated from these projected populations on a per capita basis. A daily sewage contribution of 125 gallons per day per capita (gcpd), an allowance of clear water infiltration of 85 gpcd and a storm water inflow allowance of 85 gpcd were used. To estimate peak flows, a peaking factor of 5, which is on the conservative end of a typical expected range, is used on the daily sewage contribution. This returned a loading rate of 1988 gpd per REC that was simplified to 0.0031 cubic feet per second (cfs) of flowrate per REC. This factor was used to project peak hour flow rates at various locations in the study area. The flow rates were in turn used to project sanitary sewer and lift station sizes. With pipe sizes verified for capacity, the design layout was additionally adjusted to minimize excessively deep sewers (manholes exceeding 25 feet). This was one of the cutoffs for budgetary estimates. Manholes under 15 feet were also counted separately, along with a distinction between sewers constructed above and below 15-foot depths. In general, the conceptual collection system model was balanced to ensure that sewers were sufficiently deep to prevent hung plumbing (approximately 10-feet) but shallow enough where construction was more economical. DESIGN ALTERNATIVES Reddelien Road Area For the Reddelien Service Area, there were two alternatives, both serviced by lift stations. In Alternative 1, the lift station would be located in the westernmost area of the service area, just north of Allen Road. In this alternative, the remaining system could be serviced by gravity alone. This station would have an approximate 20-foot deep influent sewer with additional depth being required for station level controls and working volume. This alternative is seen in Figure 1 in Appendix A. 5 Mr. Tim Reel City of Oconomowoc January 21, 2026 Page 3 ~47-10167 > Report > Reel-20260121-Southwest Sanitary Service Study~ Your Infrastructure Ally ruekertmielke.com In the second alternative (Alternative 2) the lift station is further north on Reddelien Road, midway between Chaffee Road and Allen Road. This station would be able to service most of the service area with gravity, but would be unable to service the western area where the first alternative station was located. This area would be serviced in this alternative with grinder pumps and pressure mains to convey to the nearest gravity sewer. The station in this case would also need to be deeper at a 27-foot depth to outfall, to accommodate the southernmost area south of Allen Road. This alternative is seen in Figure 2 in Appendix A. The forcemain for both alternatives were similar in length, with Alternative 1 being 7,500 linear feet (LF) to the presumed outfall and Alternative 2 being 7575 LF to the same location. When accounting for velocity constraints of 2 ft./s minimums (to prevent settling) and 6 ft./s maximums (to prevent water hammer during power loss), either an 8 or 10-inch diameter forcemain would be adequate for the proposed flows. While an 8-inch forcemain had adequate velocities, it was also quickly approaching maximum allowable velocity. At the design flowrate, the pipe velocity is already reaching 4.8 ft./s and reaches 6 ft./s prior to 1,000 gallons per minute (GPM) of capacity. With a slightly larger 10-inch forcemain, there is more flexibility for potential density increase or tributary expansion. The 10-inch main would accommodate closer to 1,450 GPM in lift station capacity. This increased capacity could lead to further expansions, with the most straightforward being potential expansion to the south in the case of Alternate 1. This would aid potential future development South of Valley Road For the South of Valley Road Area, there were two alternatives analyzed for cost comparison. In Alternative 3 (Figure 3 in Appendix A), the area north of Valley Road is able to be conveyed by gravity to the north, as originally intended. This would completely bypass the new lift station but still be tributary to the Concord Road Lift Station. There are grading concerns that would complicate this configuration, as one of the following would need to occur; slab on-grade structures would need to be constructed, hung plumbing for sanitary services in houses, or fill would need to be brought in to provide adequate depth to avoid hung plumbing. In this orientation the peak design capacity of the new station would be approximately 300 GPM. These modifications can also be avoided if the majority of the northern portion of the study area is redirected to cross Valley Road and be tributary to the lift station, as is shown in Alternative 4 (Figure 4 in Appendix A). In this secondary orientation the flows would increase from 300 GPM to 400 GPM. In the southern portion, there is also an area on the far southern edge that would likely need to be partially conveyed by grinder pumps and a low pressure main to the nearest gravity sewer. The proposed layout fell in an area much lower than the rest of the study area and it is not in close proximity to other lower areas that would warrant consideration for the lift station being located there. This grinder pump system would need to be installed in either alternative. One possible solution that could alter the grading in the area is a considerable hill in the western half of the southern portion. The grade change here is extreme and would need to be dealt with prior to any development. This could theoretically be spread in either the north of Valley Road area or in the low-lying southern area to allow for other conveyance, but that was not considered. 6 Mr. Tim Reel City of Oconomowoc January 21, 2026 Page 4 ~47-10167 > Report > Reel-20260121-Southwest Sanitary Service Study~ Your Infrastructure Ally ruekertmielke.com Ultimately, flows were considered coming to the proposed lift station from both the northern and southern portions of the study area. The proposed lift station south of Valley Road would discharge through a 8-inch force main flowing in the northerly direction and discharge to a gravity sewer just upstream of the Concord Rd. Lift Station. There would be a requirement to expand the Concord Rd. Lift Station to its theoretical maximum flowrate in order to accommodate the additional flow rate. The expansion is generally based on the 2021 memo, and the 2024 Southwestern Service Area Study that is found in Appendix B. The 2024 report includes the 2021 memo. This is expanded on in the cost estimate. SEWER ALTERNATIVE COSTS For the Reddelien Road Area, alternatives were compared for the cost effectiveness of either solution. Breakdowns of these costs are detailed in Appendix C for each area and alternative. Generally, Alternatives 1 and 2 for Reddelien Road were comparable, in cost and in total pipe length. Effectively, the layouts were the same but used slightly different configurations. Ultimately, the cost difference almost entirely came from the need for grinder pumps at the individual lots. The more conservative (dense) projection for cost and loadings was used in this case and it was determined that the 51 lots in the Western development area would cost approximately $918,000 to install the grinder pump system alone. In total the two alternatives’ costs are summarized in Table 1: Table 1: Cost Comparison of Reddelien Road Area Costs Alternative 1 (Gravity) Alternative 2 (Combination) Capital Cost $9,474,300 $10,252,000 20-Year Operating Cost, Net Present Value $288,370 $283,002 Total Cost (Capital + O&M) $9,762,700 $10,535,000 REC Units 452 452 Cost per RECs (Capital Only) $20,960 $22,722 For the South of Valley Road area there was only one lift station configuration, but a variation in the tributary area leading to that station. The total cost of the study area was very similar in either case, as the cost of the new lift station did not decrease considerably even when the flowrates decreased 25% and the depth of sewer did not become more shallow with the omission of the area north of Valley Road. For cost comparison, these costs were broken down into four separate cost variations, as shown in Table 2. These look to isolate the RECs and associated costs that are tributary to the new lift station from those RECs that are not tributary to the lift station. The price and total REC number differences demonstrate the shifting development cost depending on the number of RECs that bypass the new station. Please note 7 Mr. Tim Reel City of Oconomowoc January 21, 2026 Page 5 ~47-10167 > Report > Reel-20260121-Southwest Sanitary Service Study~ Your Infrastructure Ally ruekertmielke.com that these costs do not include the cost of the upgrade at Concord Lift Station, as those costs have been imposed previously on the northern portion of this study area. This is detailed further below in the Concord Lift Station Upgrade Costs section: Table 2: Cost Comparison of South of Valley Road Area Costs Alternative 3 (North of Valley Road Excluded) Alternative 4 (North of Valley Road Included) Northern Basin Southern Basin Northern Basin Southern Basin Capital Cost $867,200 $5,833,300 $165,100 $6,535,400 20-Year Operating Cost, Net Present Value $206,100 $206,100 Total Cost (Capital + O&M) $6,906,600 $6,906,600 REC Unit in Area 74 222 14 282 Cost per REC* (Capital Only) $11,719 $26,276 $11,791 $23,175 * costs do not include the cost of Concord Lift Station Upgrade detailed below. With the system orientations being effectively the same, the O&M costs, as well as system total costs are the same. These are detailed in Appendix C, however the total cost with 20-year net present values for operational costs included is $6,906,000. This includes a 30% increase in the total capital costs for contingencies, legal, administrative, and engineering costs associated with the project. This does also include the costs for the Concord Road upgrades that would be necessary for this development. Concord Road Lift Station Upgrade Costs To accommodate the new flows from the South of Valley Road study area, the Concord Road station would need to have its pumping capacity increased to the theoretical maximum which is governed by the wet well and forcemain sizes. The capacity upgrades were identified in the 2021 memo, would be directly attributable to new development. The upgrade costs for the station would likely be shared in some part across the larger development area, as the areas identified in the 2024 Southwest Sanitary Service Area Study contribute to the increased flowrate. In all, the costs attributed to development would be estimated at $644,700. These costs do not include the lift station age-related items. If only the South of Valley Road Area was considered for the Concord Road station, the cost to sewer these new areas would increase by $2,200 per REC. This has been revised from the original total in the memo for inflation (approximately 22.8% increase from a non-age related cost of $525,000 in September 2021). The upgrades needed for additional capacity over and an above pump impeller replacement are: 8 Mr. Tim Reel City of Oconomowoc January 21, 2026 Page 6 ~47-10167 > Report > Reel-20260121-Southwest Sanitary Service Study~ Your Infrastructure Ally ruekertmielke.com 1. Pump replacement from 70 Hp units to 90 Hp units. 2. Wet well fillet modifications. 3. Temporary pumping during construction work. 4. New pump motor VFDs. 5. Electrical upgrades to accommodate the larger pump motors. 6. Air conditioning to be provided in the existing Generator Building to keep the VFDs from overheating. 7. Replacement of the wet well deck with access doors since the pumps will be larger. 8. Replacement of the standby generator (age-related upgrade). 9. Painting of the piping and valves (age-related). 10. Replacement of the plug and check valves (age-related). 11. Replacement of pump controls and programmable logic controllers (age-related). There was some analysis completed on alternatives to lift station upgrades with bypassing the Concord Road Lift Station and extending the force main. The combined cost of upgrading Concord Road Lift Station and installing a forcemain from the South of Valley Road lift station to Concord Road station is estimated at 2 million dollars. This is roughly the same cost as a new 8-inch force main of 9,000 linear feet, without any consideration of other improvements (roadway, air relief manholes, increased lift station requirements). It was assumed that there was not a suitable location to discharge to other than the wastewater treatment plant, therefore only paths to the plant were considered. A reasonable route to the plant from the new lift station was roughly 11,500 linear feet. Therefore, it is more expensive to construct a new forcemain to the plant than it would be to construct a shorter forcemain and update the existing Concord Road Lift Station. These upgrades to Concord Road Lift Station would raise its firm capacity to 2,300 GPM, exceeding the required capacity for the new developments in both this study and the 2024 study (1805 GPM). This would allow for an additional 600 RECs to be tributary to the Concord Lift Station. Added flexibility for both service capacity and financing would be an added benefit for the required upgrade. A portion of both development areas would be anticipated to be funded by the City and have that cost assessed back at a later date. For the South of Valley Road Area, the new lift station, the forcemain and the air relief manhole are considered to be portions that the City would fund. This would total approximately $2,473,300. For the Reddelien Road Area, the new lift station, forcemain, air relief manholes, and larger 12-inch interceptor sewer would be considered to be portions that the City would fund. This would total approximately $4,350,000 in either orientation. These costs are detailed in Appendix C with the line items being highlighted in orange. When dividing these capital costs by the anticipated RECs, the cost to service by REC is reduced by approximately $9000 in the Reddelien Area, and $11,000 in the South of Valley Road Area. This would be subject to change with updating densities. SUMMARY There is an ability to service both study locations by gravity to new lift stations in each area. 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10 APPENDIX A WESTERN SERVICE AREA FIGURES AND ALTERNATIVES 11 12 13 14 15 APPENDIX C COST ESTIMATES 16 Project Name: Western Sanitary Study Client Name: Oconomowoc, City of Project Number: 47-10167 Western Area- Reddelien Area Alternative 1 - Western Station (all Gravity) Item Description Unit Quantity Unit Price Total 1 8" PVC (unpaved, < 15' deep) L.F. 10,082 100.00$ $1,008,200.00 2 8" PVC (unpaved, > 15' deep) L.F. 9,920 130.00$ $1,289,600.00 3 8" PVC (paved, < 15' deep) L.F. 130 160.00$ $20,800.00 4 8" PVC (paved, > 15' deep) L.F. 2,225 200.00$ $445,000.00 5 10" PVC (unpaved, < 15' deep) L.F. 400 115.00$ $46,000.00 6 10" PVC (unpaved, > 15' deep) L.F. 3,360 145.00$ $487,200.00 7 10" PVC (paved, < 15' deep) L.F. 175.00$ 8 10" PVC (paved, > 15' deep) L.F. 215.00$ 9 12" PVC (unpaved, < 15' deep) L.F. 130.00$ 10 12" PVC (unpaved, > 15' deep) L.F. 2,260 160.00$ $361,600.00 11 12" PVC (paved, < 15' deep) L.F. 400 190.00$ $76,000.00 12 12" PVC (paved, > 15' deep) L.F. 520 230.00$ $119,600.00 13 4' Dia. Sanitary Manhole ( < 15') EA. 33 5,000.00$ $165,000.00 14 4' Dia. Sanitary Manhole ( 15'-25') EA. 61 7,500.00$ $457,500.00 15 4' Dia. Sanitary Manhole ( > 25') EA. 4 8,500.00$ $34,000.00 16 4" Low Pressure Main L.F. 60.00$ 17 Grinder Pump System (by lot) EA. 18,000.00$ 18 10" PVC Force Main (Western Station) L.F. 7,500 197.00$ $1,477,500.00 19 Lift Station (750 GPM) EA. 1 1,185,937.50 $ $1,185,937.50 20 Air Relief Manhole EA. 3 38,000.00$ $114,000.00 Sub Total $7,287,937.50 Contingency, Legal, Administrative & Engineering 30% $2,186,381.25 Total Capital Cost of Alternate 1 $9,474,300.00 21 Lift Station O&M (20 year operation, Annual Cost $8000) L.S. 1 108,722.61 $ $108,722.61 22 Gravity Sewer O&M (20 year operation, Annual Cost $0.40 per LF) L.F. 29,297 5.44$ $159,262.32 23 Forcemain O&M (20 year operation, Annual Cost $0.20 per LF) L.F. 7,500 2.72$ $20,385.49 Sub Total $288,370.42 Total Net Present Value of Alternate 1 $9,762,700.00 Portion to be paid by City and be later assessed (indicated in orange) $4,379,200.00 Portion to be paid by Developer $5,095,100.00 ESTIMATED CONSTRUCTION COST Operation and Maintenance Costs (Present Value) 12/16/2025 Ruekert Mielke, Inc. Oconomowoc 47-10167 Western Area Sanitary Sewer Analysis > Capital Planning| Oconomowoc Cost - Western Study Areas.xlsx 17 Project Name: Western Sanitary Study Client Name: Oconomowoc, City of Project Number: 47-10167 Western Area- Reddelien Area Alternative 2- Northern Station (Grinder and Gravity) Item Description Unit Quantity Unit Price Total 1 8" PVC (unpaved, < 15' deep) L.F. 11,187 100.00$ $1,118,700.00 2 8" PVC (unpaved, > 15' deep) L.F. 5,765 130.00$ $749,450.00 3 8" PVC (paved, < 15' deep) L.F. 130 160.00$ $20,800.00 4 8" PVC (paved, > 15' deep) L.F. 2,225 200.00$ $445,000.00 5 10" PVC (unpaved, < 15' deep) L.F. 400 115.00$ $46,000.00 6 10" PVC (unpaved, > 15' deep) L.F. 3,610 145.00$ $523,450.00 7 10" PVC (paved, < 15' deep) L.F. 175.00$ 8 10" PVC (paved, > 15' deep) L.F. 215.00$ 9 12" PVC (unpaved, < 15' deep) L.F. 200 130.00$ $26,000.00 10 12" PVC (unpaved, > 15' deep) L.F. 2,175 160.00$ $348,000.00 11 12" PVC (paved, < 15' deep) L.F. 190.00$ 12 12" PVC (paved, > 15' deep) L.F. 470 230.00$ $108,100.00 13 4' Dia. Sanitary Manhole ( < 15') EA. 43 5,000.00$ $215,000.00 14 4' Dia. Sanitary Manhole ( 15'-25') EA. 37 7,500.00$ $277,500.00 15 4' Dia. Sanitary Manhole ( > 25') EA. 7 8,500.00$ $59,500.00 16 4" Low Pressure Main L.F. 4,220 60.00$ $253,200.00 17 Grinder Pump System (by lot) EA. 51 18,000.00$ $918,000.00 18 10" PVC Force Main (Northern Station) L.F. 7,500 197.00$ $1,477,500.00 19 Lift Station (750 GPM) EA. 1 1,185,937.50 $ $1,185,937.50 20 Air Relief Manhole EA. 3 38,000.00$ $114,000.00 Sub Total $7,886,137.50 Contingency, Legal, Administrative & Engineering 30% $2,365,841.25 Total Capital Cost of Alternate 1 $10,252,000.00 21 Lift Station O&M (20 year operation, Annual Cost $8000) L.S. 1 108,722.61 $ $108,722.61 22 Gravity Sewer O&M (20 year operation, Annual Cost $0.40 per LF) L.F. 26,162 5.44$ $142,220.05 23 Forcemain O&M (20 year operation, Annual Cost $0.20 per LF) L.F. 11,795 2.72$ $32,059.58 Sub Total $283,002.24 Total Net Present Value of Alternate 1 $10,535,000.00 Portion to be paid by City and be later assessed (indicated in orange) $4,314,700.00 Portion to be paid by Developer $5,937,300.00 ESTIMATED CONSTRUCTION COST Operation and Maintenance Costs (Present Value) 12/16/2025 Ruekert Mielke, Inc. Oconomowoc 47-10167 Western Area Sanitary Sewer Analysis > Capital Planning| Oconomowoc Cost - Western Study Areas.xlsx 18 Project Name: Western Sanitary Study Client Name: Oconomowoc, City of Project Number: 47-10167 South of Valley Road (Tributary to Concord Lift Station) Alternative 3 & 4 Cost Breakdown Item Description Unit Quantity Unit Price Total 1 8" PVC (unpaved, < 15' deep) L.F. 7,201 100.00$ $720,100.00 2 8" PVC (unpaved, > 15' deep) L.F. 3,250 130.00$ $422,500.00 3 8" PVC (paved, < 15' deep) L.F. 160.00$ 4 8" PVC (paved, > 15' deep) L.F. 200.00$ 5 10" PVC (unpaved, < 15' deep) L.F. 900 115.00$ $103,500.00 6 10" PVC (unpaved, > 15' deep) L.F. 3,810 145.00$ $552,450.00 7 10" PVC (paved, < 15' deep) L.F. 175.00$ 8 10" PVC (paved, > 15' deep) L.F. 30 215.00$ $6,450.00 9 12" PVC (unpaved, < 15' deep) L.F. 130.00$ 10 12" PVC (unpaved, > 15' deep) L.F. 75 160.00$ $12,000.00 11 12" PVC (paved, < 15' deep) L.F. 190.00$ 12 12" PVC (paved, > 15' deep) L.F. 230.00$ 13 4' Dia. Sanitary Manhole ( < 15') EA. 26 5,000.00$ $130,000.00 14 4' Dia. Sanitary Manhole ( 15'-25') EA. 21 7,500.00$ $157,500.00 15 4' Dia. Sanitary Manhole ( > 25') EA. 1 8,500.00$ $8,500.00 16 4" Low Pressure Main L.F. 400 60.00$ $24,000.00 17 Grinder Pump System (by lot) EA. 24 18,000.00 $ $432,000.00 18 8" PVC Force Main (South of Valley Road) L.F. 5,300 175.00$ $927,500.00 19 Lift Station (400 GPM) EA. 1 975,000.00 $ $975,000.00 20 Concord Lift Station Upgrades (per 2021 memo) EA. 1 644,700.00 $ $644,700.00 21 Air Relief Manhole EA. 1 38,000.00 $ $38,000.00 Sub Total $5,154,200.00 Contingency, Legal, Administrative & Engineering 30% $1,546,260.00 Total Capital Cost of Alternate 2 $6,700,500.00 22 Lift Station O&M (20 year operation, Annual Cost $8000) L.S. 1 108,722.61 $ $108,722.61 23 Gravity Sewer O&M (20 year operation, Annual Cost $0.40 per LF) L.F. 15,266 5.44$ $82,987.97 24 Forcemain O&M (20 year operation, Annual Cost $0.20 per LF) L.F. 5,300 2.72$ $14,405.75 Sub Total $206,116.33 Total Net Present Value of Alternate 2 $6,906,600.00 Portion to be paid by City and be later assessed (indicated in orange) $2,473,300.00 Portion to be paid by Developer $4,227,200.00 ESTIMATED CONSTRUCTION COST Operation and Maintenance Costs (Present Value) 12/16/2025 Ruekert Mielke, Inc. Oconomowoc 47-10167 Western Area Sanitary Sewer Analysis > Capital Planning| Oconomowoc Cost - Western Study Areas.xlsx 19