Sierra Tahoe Ready Mix
Active WDID 6A09I001197 South Lake Tahoe, El Dorado County Region 6A · Lahontan (South Lake Tahoe)
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- South Lake Tahoe, El Dorado County
- Region 6A · Lahontan (South Lake Tahoe) · Location · Statewide map
- Receiving water
- Truckee River (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
- 60 distinct results, 4 reporting years (2015 to 2018)
- Most recent sample Feb 14, 2019 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 5 inspections · 9 violation records · 7 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
- 38.896747, -120.000852
- 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
- 1526 Emerald Bay Rd, South Lake Tahoe 96150
- Regional Water Board
- 6A — Lahontan (South Lake Tahoe)
HUC12 watershed Evidence: spatial
- Upper Truckee River-Frontal Lake Tahoe HUC12 160501010303
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
- Sierra Tahoe Ready Mix Donald
- Primary industry (SIC)
- 3272-Concrete Products, Except Block and Brick
- Application ID
- 203486
- NOI processed
- Mar 26, 1992
- Last certified
- May 15, 2015
- Facility size
- 5 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 203486 | Industrial | Active | Mar 26, 1992 | — | May 15, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Truckee River
- Discharges directly / indirectly
- N / Y (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 (2)
- C3 facility HUC12 not corroborated (complete published list)
- 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 |
|---|---|---|---|
| Truckee River, Upper (below Christmas Valley) CAR6341004220000220174338 | 659 m | listed | 6 |
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.
60 distinct measurements across 13 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 | 10 | 10 | 0 | Feb 14, 2019 | Feb 14, 2019 |
| 2017 | 20 | 10 | 0 | Mar 22, 2018 | Apr 07, 2018 |
| 2016 | 10 | 10 | 0 | Jan 08, 2017 | Jan 08, 2017 |
| 2015 | 20 | 11 | 0 | Mar 11, 2016 | May 06, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 6 | 0 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Iron, Total | mg/L | 6 | 0 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Nitrate, Total (as N) | mg/L | 6 | 4 | Mar 11, 2016 | Feb 14, 2019 | Results |
| pH | SU | 6 | 0 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Phosphorus, Total (as P) | mg/L | 6 | 1 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Total Dissolved Solids (TDS) | mg/L | 6 | 0 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Total Kjeldahl Nitrogen (TKN) (as N) | mg/L | 6 | 4 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Total Suspended Solids (TSS) | mg/L | 6 | 1 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Aluminum, Total | mg/L | 5 | 0 | Mar 11, 2016 | Feb 14, 2019 | Results |
| Oil and Grease | mg/L | 4 | 3 | May 06, 2016 | Feb 14, 2019 | Results |
| Nitrate, Total (as NO3) | mg/L | 1 | 1 | Jan 08, 2017 | Jan 08, 2017 | Results |
| Total Organic Carbon (TOC) | mg/L | 1 | 0 | Mar 11, 2016 | Mar 11, 2016 | Results |
Show 1 more parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Turbidity | NTU | 1 | 0 | Jan 08, 2017 | Jan 08, 2017 | Results |
All results (60 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 14, 2019 | Aluminum, Total | .48 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1045989 | |
| Feb 14, 2019 | Electrical Conductivity @ 25 Deg. C | 78 | umhos/cm | Effluent | Qualifying Storm Event | E120.1 | 1045989 | |
| Feb 14, 2019 | Iron, Total | .32 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1045989 | |
| Feb 14, 2019 | Nitrate, Total (as N) | < .5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1045989 | |
| Feb 14, 2019 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1045989 | |
| Feb 14, 2019 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1045989 | |
| Feb 14, 2019 | Phosphorus, Total (as P) | < .1 | mg/L | Effluent | Qualifying Storm Event | E365.3 | 1045989 | |
| Feb 14, 2019 | Total Dissolved Solids (TDS) | 44 | mg/L | Effluent | Qualifying Storm Event | A2540C | 1045989 | |
| Feb 14, 2019 | Total Kjeldahl Nitrogen (TKN) (as N) | < 1 | mg/L | Effluent | Qualifying Storm Event | A4500NB | 1045989 | |
| Feb 14, 2019 | Total Suspended Solids (TSS) | 18 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1045989 | |
| Apr 07, 2018 | Aluminum, Total | 1.1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1001409 | |
| Apr 07, 2018 | Electrical Conductivity @ 25 Deg. C | 179 | umhos/cm | Effluent | Qualifying Storm Event | E120.1 | 1001409 | |
| Apr 07, 2018 | Iron, Total | .83 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1001409 | |
| Apr 07, 2018 | Nitrate, Total (as N) | < .5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1001409 | |
| Apr 07, 2018 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1001409 | |
| Apr 07, 2018 | pH | 7.84 | SU | Effluent | Qualifying Storm Event | pH_Field | 1001409 | |
| Apr 07, 2018 | Phosphorus, Total (as P) | .23 | mg/L | Effluent | Qualifying Storm Event | E365.3 | 1001409 | |
| Apr 07, 2018 | Total Dissolved Solids (TDS) | 170 | mg/L | Effluent | Qualifying Storm Event | A2540C | 1001409 | |
| Apr 07, 2018 | Total Kjeldahl Nitrogen (TKN) (as N) | < 1 | mg/L | Effluent | Qualifying Storm Event | A4500NHB | 1001409 | |
| Apr 07, 2018 | Total Suspended Solids (TSS) | 82 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1001409 | |
| Mar 22, 2018 | Aluminum, Total | 1.5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 997050 | |
| Mar 22, 2018 | Electrical Conductivity @ 25 Deg. C | 95 | umhos/cm | Effluent | Qualifying Storm Event | E120.1 | 997050 | |
| Mar 22, 2018 | Iron, Total | 1.5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 997050 | |
| Mar 22, 2018 | Nitrate, Total (as N) | < .05 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 997050 | |
| Mar 22, 2018 | Oil and Grease | 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 997050 | |
| Mar 22, 2018 | pH | 10.48 | SU | Effluent | Qualifying Storm Event | pH_Field | 997050 | |
| Mar 22, 2018 | Phosphorus, Total (as P) | .13 | mg/L | Effluent | Qualifying Storm Event | E365.3 | 997050 | |
| Mar 22, 2018 | Total Dissolved Solids (TDS) | 51 | mg/L | Effluent | Qualifying Storm Event | A2540C | 997050 | |
| Mar 22, 2018 | Total Kjeldahl Nitrogen (TKN) (as N) | < .2 | mg/L | Effluent | Qualifying Storm Event | A4500NB | 997050 | |
| Mar 22, 2018 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 997050 | |
| Jan 08, 2017 | Electrical Conductivity @ 25 Deg. C | 211 | umhos/cm | Effluent | Qualifying Storm Event | E120.1 | 924876 | |
| Jan 08, 2017 | Iron, Total | 9.1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 924876 | |
| Jan 08, 2017 | Nitrate, Total (as N) | 1.1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 924876 | |
| Jan 08, 2017 | Nitrate, Total (as NO3) | < .5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 924876 | |
| Jan 08, 2017 | pH | 8.72 | SU | Effluent | Qualifying Storm Event | pH_Field | 924876 | |
| Jan 08, 2017 | Phosphorus, Total (as P) | .29 | mg/L | Effluent | Qualifying Storm Event | E365.3 | 924876 | |
| Jan 08, 2017 | Total Dissolved Solids (TDS) | 93 | mg/L | Effluent | Qualifying Storm Event | A2540C | 924876 | |
| Jan 08, 2017 | Total Kjeldahl Nitrogen (TKN) (as N) | 1.1 | mg/L | Effluent | Qualifying Storm Event | A4500NB | 924876 | |
| Jan 08, 2017 | Total Suspended Solids (TSS) | 230 | mg/L | Effluent | Qualifying Storm Event | A2540D | 924876 | |
| Jan 08, 2017 | Turbidity | 1.7 | NTU | Effluent | Qualifying Storm Event | E180.1 | 924876 | |
| May 06, 2016 | Aluminum, Total | 1.2 | mg/L | Effluent | Non-Storm Water Discharge Event | E200.8 | 873709 | |
| May 06, 2016 | Electrical Conductivity @ 25 Deg. C | 68 | umhos/cm | Effluent | Non-Storm Water Discharge Event | E120.1 | 873709 | |
| May 06, 2016 | Iron, Total | 1.3 | mg/L | Effluent | Non-Storm Water Discharge Event | E200.8 | 873709 | |
| May 06, 2016 | Nitrate, Total (as N) | ND | mg/L | Effluent | Non-Storm Water Discharge Event | E300.0 | 873709 | |
| May 06, 2016 | Oil and Grease | ND | mg/L | Effluent | Non-Storm Water Discharge Event | E1664A | 873709 | |
| May 06, 2016 | pH | 8.16 | SU | Effluent | Non-Storm Water Discharge Event | pH_Field | 873709 | |
| May 06, 2016 | Phosphorus, Total (as P) | .19 | mg/L | Effluent | Non-Storm Water Discharge Event | E365.3 | 873709 | |
| May 06, 2016 | Total Dissolved Solids (TDS) | 98 | mg/L | Effluent | Non-Storm Water Discharge Event | A2540C | 873709 | |
| May 06, 2016 | Total Kjeldahl Nitrogen (TKN) (as N) | ND | mg/L | Effluent | Non-Storm Water Discharge Event | A4500NB | 873709 | |
| May 06, 2016 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Non-Storm Water Discharge Event | A2540D | 873709 |
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 | 9 | 7 Violation · 2 Potential (preliminary) · 0 Dismissed | Jul 02, 1999 – Apr 29, 2025 | Oct 21, 2026 | All violations |
| Enforcement actions | 7 | 7 issued · 0 draft · 0 withdrawn, rescinded or superseded | Nov 05, 2002 – Jun 05, 2025 | Oct 21, 2026 | All actions |
| Inspections | 5 | inspections, not findings | May 11, 2001 – Apr 29, 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 (32 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 20, 2026 | Annual reports | 1335197 | Annual report 2025 | — | |
| Jul 11, 2025 | Annual reports | 1294000 | Annual report 2024 | — | |
| Jun 05, 2025 | Enforcement actions | 456376 | NOV (Notice of Violation) | Active | |
| Apr 29, 2025 | Inspections | 2068280 | B Type compliance | Finalized | Additional Info Required |
| Apr 29, 2025 | Violations | 891467 | Deficient BMP Implementation | Potential | Inspection |
| Jul 25, 2024 | Annual reports | 1243078 | Annual report 2023 | — | |
| Jul 24, 2024 | Inspections | 2068278 | B Type compliance | Performed | Follow-up Inspection Needed |
| Jul 24, 2024 | Violations | 891466 | Deficient BMP Implementation | Potential | Inspection |
| Jun 29, 2023 | Annual reports | 1189073 | Annual report 2022 | — | |
| Jul 18, 2022 | Annual reports | 1112432 | Annual report 2021 | — | |
| Jul 28, 2021 | Annual reports | 1068436 | Annual report 2020 | — | |
| Aug 13, 2020 | Annual reports | 985676 | Annual report 2019 | — | |
| Jul 08, 2019 | Annual reports | 953219 | Annual report 2018 | — | |
| Jul 13, 2018 | Annual reports | 938635 | Annual report 2017 | — | |
| Jan 16, 2018 | Annual reports | 877860 | Annual report 2016 | — | |
| Dec 29, 2017 | Enforcement actions | 428200 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Nov 06, 2017 | Annual reports | 839115 | Annual report 2015 | — | |
| Oct 25, 2017 | Enforcement actions | 428134 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Jul 27, 2017 | Enforcement actions | 426294 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2017 | Violations | 865266 | Late Report | Violation | Report |
| Jul 16, 2016 | Violations | 863515 | Late Report | Violation | Annual Report |
| Jul 16, 2016 | Violations | 865202 | Late Report | Violation | Report |
| Apr 18, 2016 | Enforcement actions | 423237 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Aug 15, 2015 | Violations | 860360 | Late Report | Violation | Report |
| Aug 25, 2014 | Enforcement actions | 416160 | Verbal Communication | Historical |
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.