Canyon Rock Co
Active WDID 1 49I001091 Forestville, Sonoma County Region 1 · North Coast
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Forestville, Sonoma County
- Region 1 · North Coast · Location · Statewide map
- Receiving water
- Green Valley Creek (as reported by the facility)
- Evidence: candidate, awaiting review Details
- Identified receiving water on the 2026 303(d) list
- Not established
- Shown only when the reported receiving water is identified and corroborated.
- 2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 586 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Apr 21, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 12 inspections · 2 violation records · 1 enforcement action
- Counts as published in SMARTS; not a compliance determination · Details
Each label shows where a statement comes from. How to read the labels.
Overview and location
Reported facility location HUC12 watershed Corroborated receiving water 2026 Integrated Report waterbodies nearby
Reported location Evidence: facility-reported
- Coordinates
- 38.47495, -122.90921
- Precision
- 5 decimal places
- Shared point
- No
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 7525 Hwy 116, Forestville 95436
- Regional Water Board
- 1 — North Coast
HUC12 watershed Evidence: spatial
- Green Valley Creek HUC12 180101100901
The facility's reported location lies within this HUC12 watershed (spatial derivation); it is not a discharge location.
Permits and applications Evidence: SMARTS record
Current permit record
- Permit type
- Industrial
- Application type
- Notice of Intent (WDID code I)
- Status
- Active
- Operator
- Canyon Rock Co INCL
- Primary industry (SIC)
- 1429-Crushed and Broken Stone, NEC
- Secondary SIC
- 3273-Ready-Mixed Concrete
- Application ID
- 178795
- NOI processed
- Mar 25, 1992
- Last certified
- Jun 17, 2015
- Facility size
- 80 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 178795 | Industrial | Active | Mar 25, 1992 | — | Jun 17, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Green Valley Creek
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Why it is not confirmed (3)
- C2 candidate in another or unknown Regional Board
- C3 facility HUC12 not corroborated
- C4 candidate more than 5 km away
1 official waterbody shares this name; none is assigned without review.
Impaired waters and TMDLs
Two kinds of information, kept apart: 2026 Integrated Report waterbodies near the reported location (geographic proximity only), and TMDL records that SMARTS lists for this facility. Neither establishes where the facility discharges; see Receiving water for the facility's own statement.
Nearby waterbodies Evidence: geographic proximity
Spatial proximity only; discharge pathway not established. Being near a waterbody does not mean the facility discharges to it.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Russian River HU, Lower Russian River HA, Guerneville HSA, Green Valley Creek watershed CAR1141101320081204231407 | 196 m | listed | 5 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
No TMDL records for this facility in the SMARTS TMDL export.
Reported monitoring results Evidence: facility-reported
Numeric Action Level (NAL) screening is being independently validated and is not shown. Nothing on this page states whether a result exceeded a NAL.
586 distinct measurements across 12 parameters, most recent sample Apr 21, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 34 | 6 | 0 | Dec 21, 2025 | Apr 21, 2026 |
| 2024 | 56 | 7 | 0 | Nov 20, 2024 | Feb 19, 2025 |
| 2023 | 56 | 7 | 0 | Dec 06, 2023 | Mar 12, 2024 |
| 2022 | 62 | 12 | 0 | Dec 01, 2022 | Apr 07, 2023 |
| 2021 | 58 | 10 | 0 | Nov 01, 2021 | Apr 21, 2022 |
| 2020 | 20 | 10 | 0 | Jan 04, 2021 | Jan 04, 2021 |
| 2019 | 40 | 10 | 0 | Dec 13, 2019 | Mar 17, 2020 |
| 2018 | 40 | 10 | 0 | Dec 18, 2018 | Feb 12, 2019 |
| 2017 | 60 | 10 | 0 | Jan 09, 2018 | May 29, 2018 |
| 2016 | 80 | 10 | 0 | Nov 23, 2016 | Mar 22, 2017 |
| 2015 | 80 | 10 | 0 | Dec 22, 2015 | Apr 22, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Diesel Oil | mg/L | 68 | 66 | Dec 22, 2015 | Apr 21, 2026 | Results |
| Iron, Total | mg/L | 68 | 6 | Dec 22, 2015 | Apr 21, 2026 | Results |
| Oil and Grease | mg/L | 68 | 68 | Dec 22, 2015 | Apr 21, 2026 | Results |
| pH | SU | 68 | 0 | Dec 22, 2015 | Apr 21, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 68 | 9 | Dec 22, 2015 | Apr 21, 2026 | Results |
| Benzene | ug/L | 40 | 40 | Dec 22, 2015 | Dec 01, 2022 | Results |
| Methyl Tert-butyl Ether (MTBE) | ug/L | 40 | 40 | Dec 22, 2015 | Dec 01, 2022 | Results |
| Toluene | ug/L | 40 | 40 | Dec 22, 2015 | Dec 01, 2022 | Results |
| Xylenes, Total | ug/L | 40 | 40 | Dec 22, 2015 | Dec 01, 2022 | Results |
| Ethylbenzene | ug/L | 38 | 38 | Dec 22, 2015 | Dec 01, 2022 | Results |
| Turbidity | NTU | 26 | 0 | Dec 27, 2022 | Apr 21, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 22 | 2 | Dec 27, 2022 | Feb 19, 2025 | Results |
All results (586 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 21, 2026 | Diesel Oil | ND | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1376895 | |
| Apr 21, 2026 | Diesel Oil | ND | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1376895 | |
| Apr 21, 2026 | Iron, Total | .77 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376895 | |
| Apr 21, 2026 | Iron, Total | .17 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376895 | |
| Apr 21, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1376895 | |
| Apr 21, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1376895 | |
| Apr 21, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1376895 | |
| Apr 21, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1376895 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | 28 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1376895 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | 9.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1376895 | |
| Apr 21, 2026 | Turbidity | 22 | NTU | Effluent | Qualifying Storm Event | A2130B | 1376895 | |
| Apr 21, 2026 | Turbidity | 8.3 | NTU | Effluent | Qualifying Storm Event | A2130B | 1376895 | |
| Feb 18, 2026 | Diesel Oil | ND | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1376891 | |
| Feb 18, 2026 | Diesel Oil | ND | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1376891 | |
| Feb 18, 2026 | Iron, Total | .36 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376891 | |
| Feb 18, 2026 | Iron, Total | .17 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1376891 | |
| Feb 18, 2026 | Oil and Grease | DNQ 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1376891 | |
| Feb 18, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1376891 | |
| Feb 18, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1376891 | |
| Feb 18, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1376891 | |
| Feb 18, 2026 | Total Suspended Solids (TSS) | 13 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1376891 | |
| Feb 18, 2026 | Total Suspended Solids (TSS) | 8.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1376891 | |
| Dec 21, 2025 | Diesel Oil | ND | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1368092 | |
| Dec 21, 2025 | Diesel Oil | ND | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1368092 | |
| Dec 21, 2025 | Iron, Total | 1.1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1368092 | |
| Dec 21, 2025 | Iron, Total | .21 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1368092 | |
| Dec 21, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1368092 | |
| Dec 21, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1368092 | |
| Dec 21, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1368092 | |
| Dec 21, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1368092 | |
| Dec 21, 2025 | Total Suspended Solids (TSS) | 98 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1368092 | |
| Dec 21, 2025 | Total Suspended Solids (TSS) | 21 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1368092 | |
| Dec 21, 2025 | Turbidity | 40 | NTU | Effluent | Qualifying Storm Event | A2130B | 1368092 | |
| Dec 21, 2025 | Turbidity | 9 | NTU | Effluent | Qualifying Storm Event | A2130B | 1368092 | |
| Feb 19, 2025 | Diesel Oil | DNQ .05 | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1327334 | |
| Feb 19, 2025 | Diesel Oil | DNQ .057 | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1327334 | |
| Feb 19, 2025 | Iron, Total | .76 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327334 | |
| Feb 19, 2025 | Iron, Total | .18 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1327334 | |
| Feb 19, 2025 | Nitrite Plus Nitrate (as N) | .61 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1327334 | |
| Feb 19, 2025 | Nitrite Plus Nitrate (as N) | .86 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1327334 | |
| Feb 19, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327334 | |
| Feb 19, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1327334 | |
| Feb 19, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1327334 | |
| Feb 19, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1327334 | |
| Feb 19, 2025 | Total Suspended Solids (TSS) | 22 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327334 | |
| Feb 19, 2025 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327334 | |
| Feb 19, 2025 | Turbidity | 15 | NTU | Effluent | Qualifying Storm Event | A2130B | 1327334 | |
| Feb 19, 2025 | Turbidity | 7.1 | NTU | Effluent | Qualifying Storm Event | A2130B | 1327334 | |
| Jan 03, 2025 | Diesel Oil | .1 | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1327333 | |
| Jan 03, 2025 | Diesel Oil | .17 | mg/L | Effluent | Qualifying Storm Event | SW8015B | 1327333 |
Results are shown exactly as reported by the discharger. Identical rows repeated in the State's export are shown once. Where the export contains different versions of the same sample and parameter, each version is listed and flagged. Details.
Compliance and enforcement records Evidence: SMARTS record
These are records as the State Water Board publishes them in SMARTS, with the source's own types and statuses. They are not a compliance determination or rating. A record listed here is not proof of a violation beyond what the source states, and the absence of records does not establish compliance.
| Record type | Records | As published | Dates | Retrieved | List |
|---|---|---|---|---|---|
| Violations | 2 | 2 Violation · 0 Potential (preliminary) · 0 Dismissed | Nov 10, 1999 – Oct 18, 2024 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Dec 20, 2024 – Dec 20, 2024 | Oct 21, 2026 | All actions |
| Inspections | 12 | inspections, not findings | Apr 02, 1999 – Aug 06, 2025 | Oct 21, 2026 | All inspections |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 2025 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 0 | reports, by parameter | — | Oct 21, 2026 |
Each record type is counted by its own SMARTS identifier. A violation and the enforcement action that cites it are two records in two lists; they are never added together.
Chronological record history (26 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 13, 2026 | Annual reports | 1336060 | Annual report 2025 | — | |
| Aug 06, 2025 | Inspections | 2068946 | B Type compliance | Finalized | Follow-up Inspection Needed |
| Jul 03, 2025 | Annual reports | 1294904 | Annual report 2024 | — | |
| Dec 20, 2024 | Enforcement actions | 455608 | NOV (Notice of Violation) | Active | |
| Oct 18, 2024 | Inspections | 2066428 | B Type compliance | Finalized | Follow-up Inspection Needed |
| Oct 18, 2024 | Violations | 890925 | Deficient BMP Implementation | Violation | Inspection |
| Jun 26, 2024 | Annual reports | 1244025 | Annual report 2023 | — | |
| Jul 14, 2023 | Annual reports | 1190060 | Annual report 2022 | — | |
| Jul 14, 2022 | Annual reports | 1113496 | Annual report 2021 | — | |
| Jul 15, 2021 | Annual reports | 1069542 | Annual report 2020 | — | |
| Jul 15, 2020 | Annual reports | 986863 | Annual report 2019 | — | |
| Jul 11, 2019 | Annual reports | 954451 | Annual report 2018 | — | |
| May 21, 2019 | Inspections | 2042712 | Inspection from Vehicle | — | No Further Action |
| Dec 21, 2018 | Inspections | 2040739 | Complaint | — | Follow-up Inspection Needed |
| Jul 12, 2018 | Annual reports | 939869 | Annual report 2017 | — | |
| Jul 12, 2017 | Annual reports | 879161 | Annual report 2016 | — | |
| Jul 13, 2016 | Annual reports | 846944 | Annual report 2015 | — | |
| Oct 14, 2014 | Inspections | 2023496 | Complaint | — | No Further Action |
| Apr 13, 2012 | Inspections | 2014974 | B Type compliance | — | No Further Action |
| Mar 18, 2010 | Inspections | 2003183 | B Type compliance | — | Follow-up Inspection Needed |
| Jan 16, 2004 | Inspections | 333136 | B Type compliance | — | |
| Apr 10, 2003 | Inspections | 333135 | B Type compliance | — | |
| Nov 17, 2000 | Inspections | 305839 | B Type compliance | — | |
| Aug 01, 2000 | Inspections | 305838 | B Type compliance | — | |
| Nov 10, 1999 | Violations | 137539 | Deficient BMP Implementation | Violation | Inspection |
Sources and provenance
| Information | Source | Retrieved or published |
|---|---|---|
| Permit, location, receiving-water text | SMARTS Industrial Application Specific Data | Oct 20, 2026 |
| Permit history | SMARTS Storm Water Applications | Oct 20, 2026 |
| Monitoring results | SMARTS Industrial Parameter Data | Oct 20, 2026 |
| Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12) | USGS | 2026-10-22 |
| 2026 California Integrated Report, Appendix A: 2026 303(d) List (final) | SWRCB | 2026-10-22 |
| Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0) | SWRCB GIS | 2026-10-22 |
| SMARTS TMDL requirements | SMARTS | 2026-10-21 |
Relationships computed 2026-10-22 with methods facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1; proximity threshold 1.0 km.
How to read the evidence labels
- Evidence: SMARTS record Evidence: facility-reported Information as published in SMARTS or reported by the discharger.
- Evidence: identification corroborated The reported receiving-water name identifies one official waterbody and the facility's location is consistent with it. It does not establish a discharge pathway.
- Evidence: candidate, awaiting review Evidence: not confirmed The reported name could match one or more official waterbodies, but no identification has been confirmed; nothing is assigned without review.
- Evidence: spatial Evidence: geographic proximity Derived from the reported location only.
- Evidence: SMARTS-reported Source records whose links to official references are not yet reviewed.
- Evidence: unavailable The information could not be loaded or is not in the sources.
Records are shown as published and are not compliance determinations. How geographic context is derived.