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California Integrated Water Quality System Project (CIWQS)
   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
553708 Elizabeth van Diepen 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 None Elizabeth.vanDiepen@waterboards.ca.gov
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
Total Related Places: 0
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
137766 Lahontan Regional Water Quality Control Board, South Lake Tahoe Office Organization Employee 11/18/2015 None Waterboard
Total Related Parties: 1
  
  
  
  
Expand/Contract Regulatory Measures
Regulatory Measures (non-enforcement)
Reg. Measure ID Regulatory Measure Type Region WDID Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Amended?
Total Regulatory Measures: 0
  
  
  
  
Expand/Contract Violations
Violations within the past five years
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.
1133073 08/20/2024 Order Conditions Violation of R6T-2023-0010 Additional Conditions #3 and 5. See staff enforcement letter. Violation None Inspection Coldstream Canyon Restoration 450850 R6T-2023-0010 Y
1124421 10/30/2020 Unauthorized Discharge Evidence of unauthorized discharge of waste affecting the quality of waters of the United States was observed during the June 11, 2021 inspection. The direct discharge of deleterious material to the 100-year floodplain of the Truckee River and to surface waters within the Truckee River Hydrologic Unit occurred because of the Dischargers¿ activities Violation N Inspection Guidi Residence 455940 None Y
1109614 10/03/2022 Surface Water Exceedance of allowable turbidity increases associated with clear water diversion removal Violation N Report Saxon Creek Aquatic Organism Passage Project 448685 R6T-2022-0042 Y
1107684 08/02/2022 Deficient Monitoring Failure to monitor turbidity hourly during installation of the clear water diversion at Trout Creek. Violation N Complaint Trout Creek Restoration Reach 4 and 5 442634 R6T-2021-0019 Y
1083862 11/18/2020 Order Conditions Soil disturbance without a variance in violation of B.O. R6T-2018-0023 Additional Condition #9. Violation N Complaint Coldstream Specific Plan 402631 R6T-2018-0023 Y
1083861 11/18/2020 BMP Direct discharge of stockpiled and tracked sediment into Donner Creek in violation of B.O. R6T-2018-0023 Standard Condition #4 and Additional Condition #14. Violation N Complaint Coldstream Specific Plan 402631 R6T-2018-0023 Y
Report currently showing last five years of violations. Click here to return to viewing one year of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 6
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
  
  
  
  
Expand/Contract Enforcement Actions
Enforcement Actions
Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status
Total Enforcement Actions: 0
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
Total Regulatory Measures linked to Related Parties: 0
  
  
The current report was generated with data as of: 10/16/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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