General Information
Party ID	Party Name	Party Classification	Mailing Address	Work Phone	Email/Website
611020	Sonoma County Dept of Trans & Public Works	County Agency	1275 Airport Boulevard Santa Rosa, CA 95403	null	null	

Related Places
Place ID	Place Name	County	Region	Place Type	Relationship to Party	Relationship Start Date	Relationship End Date
867928	5C Willow Creek Road Improvement Project Phase II	Sonoma	1	Dredge/Fill Site	Owner and Operator	07/15/2020	null	
900647	Watmaugh Road Bridge (Bridge No. 20c-0017)	Sonoma	2	Dredge/Fill Site	Owner	04/07/2025	null	
896727	5C Westside Road PM 16.45 Culvert Replacement Project	Sonoma	1	Dredge/Fill Site	Operator	10/01/2024	null	

Related Parties
Party ID	Party Name	Party Type	Role/Relationship	Relationship Start Date	Relationship End Date	Classification
526431	Rob Houweling	Person	Employee	07/15/2020	null	null	
630792	Chet Jamgochian	Person	Legally Responsible Official	04/07/2025	null	null	

Regulatory Measures(non-enforcement)
Reg. Measure ID	Regulatory Measure Type	Region	WDID	Title	Status	Program	Order No.	RM Effective Date	RM Termination Date	Relationship	Relationship Start Date	Relationship End Date
458609	Enrollee - Waiver	1	null	Enrollee Sonoma County PRMD, 5C Westside Road PM 16.45 Culvert Replacement Project	Historical	CERFILLEXC	null	07/01/2023	08/20/2025	Discharger	10/01/2024	null	
439171	Enrollee - 401 Certification	1	1B20133WNSO	Enrollee - 401 Certification for Sonoma County DOT & PW 5C Willow Creek Road Improvement Project Phase II	Active	CERFILLEXC	R1-2023-0034	08/12/2020	null	Discharger	07/15/2020	null	

Violations within the past calendar year
Violation ID	Occurrence Date	Violation Type	Violation Description	Violation Status	Priority	Source	Facility Name	Violated Reg. Meas. ID	Violated Reg. Meas. Order No.	Linked To Enf.

Enforcement Actions
Enforcement ID	Enforcement Type	Enf. Order No.	Title	Program	Effective Date	Status

Regulatory Measures linked to Related Parties
Reg. Measure ID	Organization	Regulatory Measure Type	Program	Effective Date	Status
439171	Rob Houweling	Enrollee - 401 Certification	CERFILLEXC	08/12/2020	Active