Joint Village Board-Plan Commission-Public Works & Utility Agenda/ Packet

VILLAGE OF LISBON W234 N8676 Woodside Rd Lisbon, WI 53089-1545 Office: (262) 246-6100 | Email: villagehall@lisbonwi.gov | Website: www.lisbonwi.gov Join Zoom Online: https://us06web.zoom.us/j/87565604848?pwd=UndQT2taMndwY3pzblJsT0Z5ZnlKdz09 Zoom by Phone: Dial 1-312-626-6799 Meeting ID: 875 6560 4848 Passcode: 333394 JOINT MEETING AGENDA VILLAGE BOARD, PLAN COMMISSION, PUBLIC WORKS & UTILITY Richard Jung Fire Station – N54W26455 Lisbon Rd. (CTH K) WEDNESDAY, MAY 27, 2026, at 5:30P.M. (or following Public Works Committee, whichever is later) 1. Call to Order 2. Roll Call • Village Board • Public Works & Utility Committee • Plan Commission 3. Unfinished Business A. Continued open discussion regarding long-term development planning related to possible areas to include in future expansions of the sewer service area. 4. Adjourn NOTE: It is possible that members and/or a quorum of other governmental bodies may attend the above meeting to gather information. No action will be taken by any governmental body other than specifically noticed above. Citizens with disabilities who require assistance to participate in this meeting should contact Village Hall at least 72 hours in advance. Memorandum 1 Ballpark Commons Office Building 7044 South Ballpark Drive, Suite 200 Franklin, WI 53132 (414) 336-7900 foth.com May 20, 2026 TO: Dan Green, Village Administrator CC: Nick Wilichowski, DPW, Mike Yeager PE, Orrin Sumwa lt, AICP FR: Tom Ludwig PE RE: Village of Lisbon SSA Study, Focus Area(FA) 3-5 1. Study Summary To-Date As you are aware, we addressed FA 1 and FA 2 at the last joint meeting. Subsequently, we have summarized the base mapping and pertinent sewershed data for FA’s 3-5. As we discussed, we can work through these areas in chronological order at the May 27 th meeting and will complete if time permits. 2. Focus Areas 3-5 2.1 General Discussion Please see the six attachments for the three FA’s; two for each area. The first attachment, the Land Use Map identifies current land uses that were used in the sewer flow calculations. Standard flow values per household were used and full buildout was assumed for the sewershed. The second map for each area provides topographic and aerial background in lieu of land uses to aid in understanding of current conditions. The sewershed boundary has been depicted for FA 3, the pink line, and it estimates area that can contribute both gravity flow and a pumped area to a STH 164 sewer extension. A pumped area was included as Genessee Aggregate has expressed interest in sewer service as part of its reclamation plan. The FA 4 area consists primarily of the original Lisbon Sanitary District 1 (LSD 1) area already served by sewer, so no sewersheds have been delineated. We envision the discussion to include likely future adjacent areas that may need/request sewer service. Similarly, a FA 5 sewershed has not been identified. There are a few pockets of land that could potentially be developed that are interspersed amongst already established SSA’s. These areas can be discussed and added accordingly. Other key map attributes are as follows: 2.1.1 Approved SEWRPC 208 Boundary Indicated with a purple boundary. These are areas previously identified and approved through the formal SEWRPC process. Capacity has been reserved in the Sussex Wastewater Treatment Facility (WWTF). 2 2.1.2 Planned Sussex WWTF Areas Indicated with a blue dashed boundary. These areas, outside of the aforementioned 208 areas, have been included in the Sussex WWTF capacity sizing via intermunicipal agreements. 2.2 Capacity and Estimated Flow 2.2.1 FA 3 The FA 3 sewershed has no defined capacity in Sussex’s sewer conveyance system. Lisbon does own an existing dual forcemain and 15” gravity sewer located in STH 164 as indicated on the exhibits. Presumably envisioned to serve the existing SSA (purple boundary). As discussed with Sussex staff, remaining capacity in their system would need to be studied/estimated and negotiated to be able to provide service to FA 3. 2.2.2 FA 4 As indicated on the map, there is over 390,000 gpd of capacity available to Lisbon in the interceptor serving the original LSD 1. It is likely that any adjacent residential development to the north and south of LSD 1 would not exceed any capacity limits. Individual sewers connecting new residential development would need to be reviewed for capacity constraints in the existing LSD 1 collector sewers as detailed plans are prepared. If FA 3 develops into a more concentrated sewer use goal for the Village, consideration should be given to requesting a transfer of conveyance capacity from FA 4 to FA 3. 2.2.3 FA 5 FA 5 consists primarily of existing developed areas. As indicated on the capacity summary on the exhibits, if all identified land uses require sewer, capacity would be exceeded in the Lannon interceptor by over 200,000 gpd of average flow. Likelihood of these existing developments needing sewer should be discussed to determine if additional capacity is necessary in the Lannon interceptor. 3. Requested PC/Public Works Sewershed Feedback When considering the following feedback areas, review existing and potential development sewer needs that are located in the FA 3-5 areas. Once we have gathered feedback, we will recompute sewer flows and compare them to the agreement and physical pipe and treatment plant capacities. Again, we anticipate that this will be an iterative process to match desired land use/flows with contractual and system capacities. The end results likely will be commensurate with Sussex agreement capacities or may necessitate future Sussex sewer planning amendments, capacity adjustments and negotiations, if so desired by the Village of Lisbon. 3.1 Review established development/neighborhoods and advise on likelihood of sewer service. Reserve capacity or delete from sewer consideration. 3.2 Any potential redevelopment areas requiring sewer service? 3.3 Any undeveloped areas that require or could support sewer service?