Mayo Tank Replacement: Your Guide to the 12-Phase Schedule Through 2038

Why the tanks are being replaced

Many of the tanks serving the Mayo Water Reclamation Subdistrict were installed in the 1980s, and some are more than 35 years old. With more than 3,300 active connections, replacing them on a schedule helps prevent failures, protect waterways, and keep service reliable for residents.

The project swaps older fiberglass tanks for modern HDPE Septic Tank Effluent Pump (STEP) tanks and updates the electrical control panels that run them. Because of the size of the peninsula's system, the County is doing this in phases over more than a decade. A phased approach lets crews coordinate work efficiently, limit disruption in each neighborhood, and keep the system running throughout.

The phase schedule

Phase 1 starts in spring 2027 in Glebe Heights and River Club Estates, and the final phase begins in summer 2038. Some larger communities are split across several phases, so find yours below. Detailed schedules are shared closer to the start of each phase.

Schedules are based on tank age, system condition, community grouping, and the need to coordinate work across the peninsula. Homes outside a named neighborhood are evaluated individually and grouped with neighboring communities.

What the County does in each phase

1. Reach out to homeowners. The County mails a letter inviting each homeownerto schedule an on-site Planning meeting with the McCrone team.
2. Plan each property. McCrone visits every property to verify the locations of theexisting tank, control panel, and electrical connection, review site conditions, andrecord what homeowners tell them. As-built drawings can be decades old, so thisstep confirms today's reality.
3. Write a property-specific plan. The findings become a Replacement ProjectPlan Document unique to each property.
4. Confirm the plan on site. Before any physical work, the construction team,including the Contractor and the County’s inspector, reviews the plan with thehomeowner.
5. Replace the tank. Crews remove the old tank, install the new HDPE STEP tank,and update the electrical controls. Most replacements take one to several days.
6. Restore and follow up. Disturbed areas are seeded and strawed. A post-construction meeting reviews the finished work, and any remaining concerns arereviewed and resolved as appropriate.

What homeowners do in each phase

Homeowners take part in four meetings, and you know your property best. Here is what to expect once your community's phase begins.

1. Planning Meeting. Homeowners will be invited to meet with an engineer from McCrone Engineering to assess their unique property features. On site, you will point out landscaping, fencing, structures, access concerns, and past changes to your property. This meeting is informational, so some technical questions may not be answered on the spot, but every question is recorded for the County's project team to follow up.
2. Pre-Construction Meeting. Review your Replacement Project Plan Document with the Contractor and the County’s inspector, confirm access points and work areas, flag any special considerations for landscaping or structures, and agree on how you will communicate during construction.
3. Construction. Expect clearly marked work areas, safety fencing, temporary changes to yard access or driveway use, and equipment noise during workhours. Most replacements take one to several days, depending on site conditions and weather.
4. Post-Construction Meeting. Walk the finished work with the team, confirm the installation is complete, raise any remaining concerns, and sign the Replacement Project Plan Document, noting any next steps.

If an issue comes up after construction, report it to the project team so it can be reviewed and resolved.