In Lakeside, the Sewer District Boundary Now Shapes What a Lot Can Become

Since March 2025, the Lakeside County Water and Sewer District has issued sewer capacity for 150 homes to Discovery Land, the developer behind Territory 1889. By the district's own count, room for 39 more homes is left for everyone else in Lakeside until a new treatment plant opens, and that plant isn't expected until 2028.

On October 20, the district board approved a temporary moratorium on annexing new properties, according to the Flathead Beacon. If you're comparing west-shore homes or land this winter, two parcels with the same view and a similar price can now have very different futures. One is inside the district line and one is outside it. No listing photo shows that line.

The ledger behind the number 39

The district measures capacity in gallons per day and turns that into "equivalent dwelling units," or EDUs, at 230 gallons each. Its rules describe an equivalent user as an average single-family home. The capacity summary the Beacon published starts from a baseline of 87,703 gallons per day, set by the Montana Department of Environmental Quality as of March 28, 2025. It then subtracts every commitment made since.

Subtract those commitments and the summary shows 67 EDUs, a figure it dates April 27, 2026. Individual hookups come off that figure too. There were 18 new EDUs in fiscal year 2025, mostly in-district Lakeside connections plus a few in Somers, and 10 so far in fiscal year 2026. That leaves 39 in total.

Those 28 units set the pace. Ordinary one-home-at-a-time connections used 28 units across FY2025 and FY2026 to date. At that pace, 39 units doesn't comfortably last until 2028. The issued but unbuilt allocations also matter. Steam Boat's 60 units and Discovery Land's 150 sit on the books as spoken for, whether or not a single foundation has been poured.

Why the district closed the door to new properties

Seen that way, the moratorium is a triage decision. "Our first responsibility is to protect our commitments to the customers and property owners already within the district," General Manager Rodney Olson told the Flathead Beacon. The board's October 20 agenda lists it as Ordinance 26-3, "Temporary Moratorium on New Annexations Requiring Wastewater Treatment Capacity."

The board kept some discretion. Until the new plant comes online, it can approve annexations case by case once the needs of properties already in the district are met. Olson's examples were a lake house just outside the district that wants to come off septic, or another emergency. Whether any particular property qualifies is up to the board, so only the district can answer that for a specific parcel.

For a buyer, this changes the order of questions. Outside the boundary, a new build may have to plan around an on-site septic system. That runs through Flathead County's sewage and septic process, which starts with a Land Research Request before a new permit application. The county's application page separates site evaluations from site reviews. Site evaluations cover parcels over 20 acres without prior approval, plus replacement systems. Site reviews are usually for parcels under 20 acres that already have a Certificate of Subdivision Approval. It also notes that new development requires a non-degradation analysis. Each of those steps takes time, and the county decides the outcome, not the seller.

Inside the line still comes with limits

Being inside the district is the stronger position, but it isn't unlimited. The district's rules, Ordinance 11-2, tie original-district parcels to the capacity set in Resolution No. 33 from December 7, 1994, at one equivalent user per half acre. Anything above that counts as "expanded capacity," and so does all new out-of-district service. A large in-district parcel bought with plans to split it or add units can run into that ceiling.

Fees follow the same logic. The posted fee table, labeled effective September 1, 2023, lists a $4,162 sewer system-development fee for a ¾-inch connection, a $2,081 sewer latecomer fee for out-of-district or over-density service, and a $100 permit and inspection fee. The rules also say an existing connection can owe a plant investment fee if its use or capacity changes. Since that schedule dates from 2023, confirm the current figures with the district before relying on them.

The district's developer guide spells out the sequence. First you ask about service availability, capacity, annexation requirements and timing. A will-serve letter is issued only once requirements are met and capacity is available. If a buyer's plan depends on that letter, the answer belongs in the due-diligence window, before closing.

Why one developer is paying for the pipe in front of your house

The orange cones on US 93 are part of the same story. The gravity sewer main being replaced from Blacktail Road to Bierney Creek Road is a $4.2 million contract awarded to Swank Enterprises. The Bigfork Eagle reported that Discovery Land is financing 100% of it under a March 2025 service agreement with the district. That section of main serves all of Lakeside and everything south of it. New 12-inch and 15-inch lines are going in.

"It's not an expense that we have to pass on to our ratepayers, but we will still get to update our system and make it significantly more reliable for future growth," Olson told the Bigfork Eagle. The deal makes sense on both sides. The district gets a 1987-era collection system rebuilt without billing customers for it. The developer gets an upgraded mainline that will serve its planned resort. Pipes and treatment are separate questions, though. A bigger main moves more wastewater, but the plant at the end of it is what sets the 39-unit limit.

The work was 75% complete as of October 21. Remaining construction and permanent asphalt were expected by the end of November, and the schedule could change. Chip seal on the replaced pavement is planned for early 2027. Check MDT's construction report for current lane closures before you drive through.

Three things still undecided

The 2028 date depends on several decisions still in motion.

1. The Territory 1889 final plat. Flathead County commissioners tabled the Phase I final plat until November 10. It was the second time Planning Director Erik Mack asked to delay the vote, citing unmet conditions and, as the Daily Inter Lake reported, discrepancies with the public water system and water rights. Phase I covers 79 residential lots.
2. The courts. On August 10, a district court upheld DEQ's groundwater discharge permit for the phase-one facility. The Flathead Beacon reported that the permit allows up to 200,000 gallons a day, and that Citizens for a Better Flathead and the Confederated Salish and Kootenai Tribes were weighing an appeal. The Daily Inter Lake reported a separate lawsuit over phase two, filed August 14, with the Flathead Lakers joining.
3. The price tag. In June, the Beacon reported phase two at $31,317,190, most of it from a DEQ state revolving-fund loan. The district's July 2026 draft rate study uses $41,421,769. In what it calls a worst-case scenario, $19,958,000 of that would be funded by district ratepayers. The study is marked draft and subject to change. For an in-district buyer, that gap is a real question about future monthly bills.

What to check on a Lakeside parcel this winter

• The boundary. The district's rules point to the Flathead County GIS interactive map. You can search by owner, address or assessor number and turn on the water and sewer district layers.
• Service availability, in writing. Ask the district directly whether capacity exists for your intended use. A will-serve letter is only issued once requirements are met and capacity is available.
• Density. On an in-district parcel you plan to split or build more on, compare your plan to the one-per-half-acre allocation.
• Septic feasibility. Outside the line, start the county's Land Research Request early.
• The calendar. Watch the November 10 commission agenda and any word on the phase-two lawsuits.

FAQ

Can a property outside the district still get sewer before 2028? The board can approve annexations case by case once existing-district needs are met. Its stated examples were a lake house coming off septic or an emergency. Only the district can say whether a specific property qualifies.

Does the moratorium affect homes already connected? It targets new annexations. Changing an existing connection's use or capacity can still trigger fees under the district's rules.

When will the new plant be ready? The district expects 2028. That timeline sits alongside pending litigation and cost estimates that don't match.

This post is general information, not legal, tax or financial advice. Confirm your own parcel's situation with the district, the county and the right professional before you act.

If you're looking at a Lakeside lot or a home with plans attached, let's find out which side of the district line it sits on before you write the offer. I'll help you get the right questions to the right offices while there's still time to use the answers. Maureen Gerber. Let's Connect.