NPDES WAR315445 · Clean Water Act
MT. SI, Fall City, WA: NPDES WAR315445 discharge permit, effluent exceedances, inspections, penalties
MT. SI, Fall City, Washington: General permit coverage WAR315445, held by Mt. Si. Investments, LLC; Construction stormwater; Effective; issued November 19, 2025, term to December 31, 2030, by State.
No violation or effluent exceedance is on file for any of the 3 pollutants listed for NPDES WAR315445.
- pH: 2 limits.
- Turbidity: 1 limit.
- Transparency: 1 limit.
Washington holds 4,744 Construction stormwater coverages of this permit type in EPA’s file; 3,913 were issued before WAR315445.
Coverages issued nearest WAR315445
- 2025-11-19: PALOUSE JUNCTION, Connell: WAR315440, held by Oneenergy Renewables.com
- 2025-11-19: PFAU RESIDENCE, Renton: WAR315441, held by Damskov Construction
- 2025-11-19: CREEKSIDE AT THE RIDGE, Blaine: WAR315442, held by East Harbor Hills, LLC
- 2025-11-19: THE VILLAGES AT CLEARWATER CREEK, Richland: WAR315443, held by Hayden Homes
- 2025-11-19: ROYLE RIDGE - MOMENTUM INC, Ridgefield: WAR315444, held by Momentum Inc.
- 2025-11-19: CHA CHA 15, Fall City: WAR315446, held by Cha Cha 15 Investments, LLC
- 2025-11-19: MOUNTAINS TO SOUND GREENWAY TRAIL PHASE 3, Bellevue: WAR315447, held by Johansen Construction Company
- 2025-11-19: MODERA WOODMONT BEACH, Des Moines: WAR315449, held by Mill Creek Residential Trust
- 2025-11-19: GREENWATER RIVER RIVER MILE 3.8 TO 5.0, Greenwater: WAR315450, held by South Puget Sound Salmon Enhancement Group
- 2025-11-19: NE 63RD STREET SHORT PLAT, Vancouver: WAR315451, held by Provision Group, LLC
MT. SI among its neighbors
25 discharge permits are in the Patterson Creek-Snoqualmie River subwatershed (HUC 171100100404); WAR315445 is one. Its county: 1,319, 8 major; WAR315445 is minor permit.
Other permits in the Patterson Creek-Snoqualmie River subwatershed (HUC 171100100404)
- AMPHENOL CMT, Snoqualmie: WAR312495, minor, term to 2024-12-31
- CEDAR 23, Fall City: WAR314834, minor, term to 2025-12-31
- CHA CHA 15, Fall City: WAR315446, minor, term to 2030-12-31
- ELEMENTARY SCHOOL #6, Snoqualmie: WAR302784, minor, term to 2015-12-31
- FALL CITY II, Fall City: WAR312290, minor, term to 2025-12-31
- KELLER DAIRY, Fall City: WAG994453, minor, term to 2022-03-02
- KIMBALL CREEK, Snoqualmie: WAR125505, minor, term to 2015-12-31
- KING COUNTY ROAD SERVICES-HOOVER PIT, Fall City: WAG503019, minor, term to 2026-03-31
- MT SI QUARRY SMM LLC, Snoqualmie: WAG507199, minor, term to 2026-03-31
- SANDY COVE PARK, Snoqualmie: WAR316003, minor, term to 2030-12-31
Identity
| Facility | MT. SI |
|---|---|
| Permittee | Mt. Si. Investments, LLC |
| NPDES ID | WAR315445 |
| Status | Effective |
| Type | General permit coverage |
| Class | Minor |
| Facility type | Non-POTW |
| Program | Construction stormwater |
| Issued | November 19, 2025 |
| Expires | December 31, 2030 |
| Agency | State |
| Address | Fall City, WA 98024 |
| Subwatershed | Patterson Creek-Snoqualmie River (HUC 171100100404) |
NPDES WAR315445: effluent limits and exceedances
MT. SI (NPDES WAR315445): 3 pollutants on file, 3 limited; 0 with a violation of any kind, 0 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| pH | 2 | 0 | 0 | ||
| Turbidity | 1 | 0 | 0 | ||
| Transparency | 1 | 0 | 0 |
NPDES WAR315445: inspections, violations and enforcement
NPDES WAR315445 (MT. SI): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES WAR315445
NPDES WAR315445: one email when its EPA record changes — $99/month.
Permits near NPDES WAR315445
NPDES WAR315445: 3 pollutant rows, 0 dated events; ICIS-NPDES download, loaded September 15, 2026.