11/02/2026
Sometimes the greatest challenge in construction is what you can't shut down.
A recently announced $1 billion upgrade to San Francisco's largest wastewater treatment plant caught our attention.
The facility handles nearly 80% of the city's wastewater. And the improvements must be completed while the plant continues operating.
Think about that for a moment.
It's one thing to estimate the cost of constructing a new facility on an empty site.
It's another to estimate improvements to a facility that cannot stop serving the people who depend on it.
Hospitals must continue caring for patients. Universities must accommodate students. Public utilities must continue delivering essential services.
These projects bring considerations that aren't always obvious in the drawings:
• Phased construction and temporary facilities
• Restricted access and limited work windows
• Protection of existing systems and operations
• Additional coordination, safety, and logistical requirements
Each can influence construction costs, schedules, and risk.
At Blanchard Cost Estimating, we believe a good estimate needs to reflect more than what is being built. It also needs to account for the conditions under which the work must happen.
Because sometimes the most important part of a project is what needs to keep working while construction takes place.
Professionalism. Precision. Partnership.