Posted on May 26, 2026 by Brent Phillips

For water asset managers overseeing steel tanks and elevated towers, a failing protective coating is never a cosmetic problem. Coating breakdown exposes bare metal to moisture and oxygen, accelerating structural corrosion and threatening drinking water quality. The American Water Works Association (AWWA) recommends inspecting steel water storage facilities every three to five years to maintain structural integrity and regulatory compliance. The decision that follows is how to structure the maintenance contract that governs when and how that work gets done.

What a Protective Coating Maintenance Contract Covers

A protective coating maintenance contract defines the scope of inspection, surface preparation, and recoating that a vendor provides over a set period. Standard agreements include scheduled inspections, wet-film thickness testing, surface preparation to SSPC standards, and the application of approved coating systems. At Cunningham Sandblasting Inc., every contract is structured around AWWA D102—the industry benchmark for water tower coating on steel storage tanks—so each maintenance program delivers documented, measurable outcomes.

Short-Term Contracts: Lower Commitment, Higher Risk

Short-term contracts—typically one to three years—offer flexibility and competitive rebidding cycles. The tradeoffs, however, are real and measurable:

• Each new contract requires a full condition assessment before work can be scoped
• Coating systems may differ between contractors, creating adhesion and compatibility failures
• Deferred touch-ups allow pinhole corrosion to expand into full-panel failures
• Emergency recoating following neglect typically costs two to three times more than scheduled maintenance
• Compliance gaps between contract cycles increase municipal liability exposure

Over a 20-year asset horizon, short-term procurement consistently produces higher cumulative expenditure.

Long-Term Programs: Predictable Budgets, Fewer Outages

A long-term maintenance program—typically five to ten years—locks in defined inspection schedules, approved protective coatings systems, and fixed labor rates. Consistent water tower maintenance under a multi-year agreement allows annual touch-ups before minor coating breakdown escalates to a full-panel blast and recoat. The EPA’s Drinking Water State Revolving Fund (DWSRF) guidance confirms that proactive asset management consistently produces lower lifecycle costs than reactive repair strategies.

How Inspection Data Informs Your Contract Choice

AMPP-certified inspectors use wet film thickness gauges, holiday detectors, and digital condition reports to measure the degradation rate of your protective coating system. Facilities with high corrosion activity or aging coating systems benefit most from long-term agreements that authorize remediation before failures spread. Facilities with newer, stable systems may manage short-term cycles, provided inspection intervals remain consistent, and findings are documented at each visit.

Which Contract Type Reduces Lifecycle Costs?

AWWA research on water tower coating asset management shows that scheduled maintenance can extend coating service life from an industry average of 10 to 15 years to 20 or more years. A proactive long-term maintenance program reduces total recoating expenditure compared to reactive, project-by-project contracting. A properly maintained protective coating lasts longer and costs less per year of service, a clear case for any water system manager responsible for long-range capital planning.

Schedule Your Inspection with Cunningham Sandblasting Inc.

If your municipality’s water assets are overdue for inspection, Cunningham Sandblasting Inc. is ready to help. Based in Joplin, Missouri, our certified team delivers AWWA D102-compliant protective coating inspection, surface preparation, and recoating for water systems across the region. Call today (620) 848-3030 to schedule an on-site visit. We will assess your storage tanks and towers, deliver a written condition report, and quote the cost of a water tower maintenance program built around your budget. Take control of your infrastructure before deferred maintenance controls your costs.