Web Exclusive: Point Arena Lighthouse Restoration

Point Arena Lighthouse in 1870.

By 2005, the harsh marine environment had accelerated the degradation of the concrete tower.

Sections of concrete were falling, as well as the corbel supporting the balcony, putting the public at risk.

Sections of concrete were falling, as well as the corbel supporting the balcony, putting the public at risk.

There was marked deterioration around the windows.

Hydrodemolition (high-pressure waterblasting) was used to remove the exterior coatings.

Project engineer JZMK Partners removed the existing coating and identified repair areas

Repair contractor Alpha Restoration & Waterproofing removed the deteriorated concrete, cleaned and coated the steel with an epoxy-modified cementitious anti-corrosion coating, and replaced steel reinforcement as needed.

For larger areas, the contractor installed cathodic protection anodes and then filled all repair areas with two-component, fast-setting, polymer-modified, cement-based mortar.

Cornice support prepared and ready for restoration work.

Cornice support after restoration formwork was removed.

Completed cornice support with protective coating applied.

Door opening before restoration work began.

Door opening after restoration work and protective coating.

Window, before.

Window, before.

Wondow, after.

Window, after.

Copper roof, before.

Copper roof, before.

Copper roof, after.

The Point Arena Lighthouse restored back to original condition.

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