The Watershed & Coastal Resources Division has staff in two locations: The H.G. Osborne Building and the Katella Field Office

H.G. Osborne Building - RDMD Headquarters

Lobby Phone: (714) 834-2300

Watershed & Coastal Resources Office:
Phone: (714) 834-5173
Fax: (714) 834-5106

Street Address: 300 North Flower Street, Santa Ana, CA 92703-5000
Mailing Address: P.O. Box 4048, Santa Ana, CA 92702-4048

Regular Business Hours: 8:00am - 5:00pm

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Katella Field Office

Phone: (714) 567-6363
Fax: (714) 567-6220

Address: 1750 South Douglass Road, Anaheim, CA 92806

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