Marin Quarry
Active WDID 5S09I016274 Riverton, El Dorado County Region 5S · Central Valley (Sacramento)
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Riverton, El Dorado County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- Receiving water
- Unnamed tributary to South Fork American River (as reported by the facility)
- Evidence: not confirmed 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
- None
- Monitoring results Evidence: facility-reported
- 69 distinct results, 4 reporting years (2015 to 2018)
- Most recent sample Feb 14, 2019 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 4 violation records · 4 enforcement actions
- 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
- 38.790759, -120.400033
- Precision
- 6 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
- Ice House Rd, Riverton 95726
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Plum Creek-South Fork American River HUC12 180201290304
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
- Mountain Aggregates LLC
- Primary industry (SIC)
- 1499-Miscellaneous Nonmetallic Minerals, Except Fuels
- Secondary SIC
- 1429-Crushed and Broken Stone, NEC
- Application ID
- 198431
- NOI processed
- Dec 05, 2000
- Last certified
- Sep 17, 2024
- Facility size
- 12 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 198431 | Industrial | Active | Dec 05, 2000 | — | Sep 17, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Unnamed tributary to South Fork American River
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
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.
69 distinct measurements across 4 parameters, most recent sample Feb 14, 2019.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2018 | 12 | 3 | 0 | Jan 17, 2019 | Feb 14, 2019 |
| 2017 | 18 | 3 | 0 | Nov 16, 2017 | Mar 14, 2018 |
| 2016 | 24 | 3 | 0 | Oct 28, 2016 | Jan 09, 2017 |
| 2015 | 15 | 4 | 0 | Dec 22, 2015 | Mar 14, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| pH | SU | 23 | 0 | Dec 22, 2015 | Feb 14, 2019 | Results |
| Total Suspended Solids (TSS) | mg/L | 23 | 1 | Dec 22, 2015 | Feb 14, 2019 | Results |
| Oil and Grease | mg/L | 21 | 17 | Mar 07, 2016 | Feb 14, 2019 | Results |
| Total Organic Carbon (TOC) | mg/L | 2 | 0 | Dec 22, 2015 | Dec 22, 2015 | Results |
All results (69 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 14, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1045708 | |
| Feb 14, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1045708 | |
| Feb 14, 2019 | pH | 6.59 | SU | Effluent | Qualifying Storm Event | A4500HB | 1045708 | |
| Feb 14, 2019 | pH | 6.15 | SU | Effluent | Qualifying Storm Event | A4500HB | 1045708 | |
| Feb 14, 2019 | Total Suspended Solids (TSS) | 360 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1045708 | |
| Feb 14, 2019 | Total Suspended Solids (TSS) | 150 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1045708 | |
| Jan 17, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1039601 | |
| Jan 17, 2019 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1039601 | |
| Jan 17, 2019 | pH | 7.18 | SU | Effluent | Qualifying Storm Event | A4500HB | 1039601 | |
| Jan 17, 2019 | pH | 6.85 | SU | Effluent | Qualifying Storm Event | A4500HB | 1039601 | |
| Jan 17, 2019 | Total Suspended Solids (TSS) | 270 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1039601 | |
| Jan 17, 2019 | Total Suspended Solids (TSS) | 18 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1039601 | |
| Mar 14, 2018 | Oil and Grease | .7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 995266 | |
| Mar 14, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 995266 | |
| Mar 14, 2018 | pH | 7.26 | SU | Effluent | Qualifying Storm Event | A4500HB | 995266 | |
| Mar 14, 2018 | pH | 7.09 | SU | Effluent | Qualifying Storm Event | A4500HB | 995266 | |
| Mar 14, 2018 | Total Suspended Solids (TSS) | 110 | mg/L | Effluent | Qualifying Storm Event | A2540D | 995266 | |
| Mar 14, 2018 | Total Suspended Solids (TSS) | 2.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 995266 | |
| Jan 09, 2018 | Oil and Grease | .78 | mg/L | Effluent | Qualifying Storm Event | E1664A | 990169 | |
| Jan 09, 2018 | pH | 7.49 | SU | Effluent | Qualifying Storm Event | A4500HB | 990169 | |
| Jan 09, 2018 | Total Suspended Solids (TSS) | 35 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990169 | |
| Nov 27, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 977729 | |
| Nov 27, 2017 | pH | 7.24 | SU | Effluent | Qualifying Storm Event | A4500HB | 977729 | |
| Nov 27, 2017 | Total Suspended Solids (TSS) | 91 | mg/L | Effluent | Qualifying Storm Event | A2540D | 977729 | |
| Nov 16, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 977623 | |
| Nov 16, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 977623 | |
| Nov 16, 2017 | pH | 7.29 | SU | Effluent | Qualifying Storm Event | A4500HB | 977623 | |
| Nov 16, 2017 | pH | 7.31 | SU | Effluent | Qualifying Storm Event | A4500HB | 977623 | |
| Nov 16, 2017 | Total Suspended Solids (TSS) | 120 | mg/L | Effluent | Qualifying Storm Event | A2540D | 977623 | |
| Nov 16, 2017 | Total Suspended Solids (TSS) | 130 | mg/L | Effluent | Qualifying Storm Event | A2540D | 977623 | |
| Jan 09, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Jan 09, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Jan 09, 2017 | pH | 7.06 | SU | Effluent | Qualifying Storm Event | A4500HB | 918292 | |
| Jan 09, 2017 | pH | 6.79 | SU | Effluent | Qualifying Storm Event | A4500HB | 918292 | |
| Jan 09, 2017 | Total Suspended Solids (TSS) | 31 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918292 | |
| Jan 09, 2017 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918292 | |
| Jan 04, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Jan 04, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Jan 04, 2017 | pH | 6.58 | SU | Effluent | Qualifying Storm Event | A4500HB | 918292 | |
| Jan 04, 2017 | pH | 6.81 | SU | Effluent | Qualifying Storm Event | A4500HB | 918292 | |
| Jan 04, 2017 | Total Suspended Solids (TSS) | 32 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918292 | |
| Jan 04, 2017 | Total Suspended Solids (TSS) | 36 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918292 | |
| Dec 16, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Dec 16, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Dec 16, 2016 | pH | 6.94 | SU | Effluent | Qualifying Storm Event | A4500HB | 918292 | |
| Dec 16, 2016 | pH | 6.79 | SU | Effluent | Qualifying Storm Event | A4500HB | 918292 | |
| Dec 16, 2016 | Total Suspended Solids (TSS) | 16 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918292 | |
| Dec 16, 2016 | Total Suspended Solids (TSS) | 2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918292 | |
| Oct 28, 2016 | Oil and Grease | .83 | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 | |
| Oct 28, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5220B | 918292 |
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 | 4 | 4 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2008 – Jul 15, 2025 | Oct 21, 2026 | All violations |
| Enforcement actions | 4 | 4 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 01, 2008 – Aug 08, 2025 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Mar 03, 2022 – Mar 03, 2022 | 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 (20 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 08, 2026 | Annual reports | 1337303 | Annual report 2025 | — | |
| Aug 21, 2025 | Annual reports | 1296210 | Annual report 2024 | — | |
| Aug 08, 2025 | Enforcement actions | 457290 | NOV (Notice of Violation) | Active | |
| Jul 15, 2025 | Violations | 892761 | Late Report | Violation | Report |
| Sep 16, 2024 | Annual reports | 1245407 | Annual report 2023 | — | |
| Sep 09, 2024 | Enforcement actions | 454466 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Active | |
| Jul 16, 2024 | Violations | 890095 | Late Report | Violation | Report |
| Jul 11, 2023 | Annual reports | 1191514 | Annual report 2022 | — | |
| Jul 15, 2022 | Annual reports | 1115085 | Annual report 2021 | — | |
| Mar 03, 2022 | Inspections | 2055030 | Complaint | Finalized | Additional Info Required |
| Jul 15, 2021 | Annual reports | 1063177 | Annual report 2020 | — | |
| Jul 13, 2020 | Annual reports | 980050 | Annual report 2019 | — | |
| Mar 02, 2020 | Enforcement actions | 436539 | NOV (Notice of Violation) | Active | |
| Jan 01, 2020 | Violations | 872903 | Late Report | Violation | Report |
| Jun 21, 2019 | Annual reports | 956303 | Annual report 2018 | — | |
| Jun 18, 2018 | Annual reports | 941730 | Annual report 2017 | — | |
| Jun 24, 2017 | Annual reports | 881130 | Annual report 2016 | — | |
| Jul 14, 2016 | Annual reports | 842645 | Annual report 2015 | — | |
| Aug 01, 2008 | Enforcement actions | 352705 | NNC (Notice of Non-Compliance) | Historical | |
| Jul 02, 2008 | Violations | 782001 | Late Report | Violation | Report |
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.