BOE Dewatering Requirements and What it Means for Your Projects

Justin Manalo

Posted by Justin Manalo

The Bureau of Engineering E-Permit Group is changing the way they enforce an existing order which will result in additional reviews of 4-6 months for new construction projects that require temporary dewatering. The order (Special Order 001-0204) has been in place since 2003, originally placing the responsibility on Public Works Inspectors and Contractors to verify compliance during excavation. Moving forward it will now be a part of the E-Permit review process and is required prior to the issuance of any Excavation/Grading/Shoring permit(s).

The Burnham LA team is working with local officials to gather more information on the updated process and requirements to move your project forward and get permitted as quickly and efficiently as possible.  

Which Projects Will Be Affected

New construction projects with excavations on private property adjacent to a public street where lateral support to such street or improvements or property within such street is imperiled by the excavation and the proposed bottom of excavation is deeper than water table, or requires temporary dewatering during construction.

What These New Changes Mean for Your Projects

An additional dewatering consultant must be brought onboard at the onset of shoring design to provide pump tests and assemble dewatering plans. This may result in amended Geotechnical reports and adjustments to depth of excavations, shoring design, and foundation designs. Additional reviews from the BOE Geotechnical Engineering Division, Wastewater Engineering Services Division, Industrial Waste Management Division, and Regional Water Board may be required depending on the amount of discharge, method of discharge (recycled, sanitary sewer, or storm drain), why alternatives of dewatering are not feasible, and other reasons. Please keep in mind that in addition to the added costs and time to onboard the appropriate consultants, there can be an additional 4-6 months of review time and additional fees.

As our team learns more, we will share more about the order and how it will affect the permitting process. Please reach out for more information on how your project might be affected.

Learn About Our Los Angeles Office

Is this dewatering review requirement still in effect today?
Yes - Special Order 001-0204 remains active and is now fully built into LA Bureau of Engineering's standard Excavation E-Permit and U-Permit review processes, rather than being a new or pending change. It's treated as routine, established procedure at this point.
What's the preferred order of disposal for dewatering effluent in LA?
Onsite non-potable reuse is preferred first. If that's not feasible, discharge to the sanitary sewer is the standard secondary option (requiring a Wastewater Service Information request to LA Sanitation plus an Industrial Waste Permit). Discharge to storm drains is treated as a last resort and is heavily regulated due to water quality concerns.
Why does the city prefer avoiding dewatering altogether if possible?
Avoiding dewatering reduces two specific risks: soil settlement around the excavation site, and the potential to mobilize underground contamination plumes that would otherwise stay undisturbed - both of which create complications well beyond the immediate construction site.
What does an applicant need to submit if dewatering can't be avoided?
An engineering report explaining specifically why feasible alternatives (like staged construction during lower-groundwater seasons, or building in the "wet") aren't workable, along with a geotechnical report addressing settlement risk and a detailed dewatering plan - all subject to plan check and approval before excavation permits issue.
Does every project with deep excavation automatically trigger this dewatering review?
Only when specific conditions are met - namely, when excavation is adjacent to a public street where lateral support could be compromised, and the proposed excavation depth goes below the water table or otherwise requires temporary dewatering during construction. Shallow excavations or ones with no water table conflict generally don't trigger it.

 

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