Location Details Location ID:  04A100   Download Location Data Location Basics Location ID 04A100 Location Name SKAGIT RIVER AT MARBLEMOUNT Location Description LOCATED AT THE BRIDGE ON THE CASCADE RIVER ROAD WHERE HIGHWAY 20 (NORTH CASCADES HIGHWAY) TURNS 90 DEGREES IN MARBLEMOUNT Location Setting Stream/River - Channeled, flowing water Address WA SKAGIT Ecology Facility/Site ID Location ID Aliases (Alias Type) Location Data Summary Associated EIM Studies AMS001 AMS001-2 AMS001B AMS001C AMS001D AMS001E AMS004 AMS005 Sample Matrix(s) Water AIR/GAS Sample Sources Fresh/Surface Water Outdoor Air Field Collection Date Range 7/15/1959 - 7/10/2024 Number of Parameters Obtained 37  (View Data) Samples and Measurements 4974 Bioassay Results 0  Discrete Results 8889  (View Data) Time-Series Results 57314  (Chart Data) Summarized Time-Series Results 7371 Water Column Profile Results 0  Summarized Water Column Profile Results 0   Horizontal Coordinates Calculated Latitude Decimal Degrees (NAD83HARN) 48.52623 Calculated Longitude Decimal Degrees (NAD83HARN) -121.42902 Township/Range/Section/Qtr/Qtr-Qtr 35 N 11 E 18 NW NE Horizontal Coordinates Represent stream center Lat/Long Decimal Degree (Input) 48.5262295687489 , 121.429015561392 Horizontal Datum (Input) NAD83 - North American Datum of 1983 Horizontal Coordinate Accuracy +/- 40 ft (12 m) Horizontal Coordinate Collection Method Paper map interpolation Paper Map Scale 1:25,000 Elevation Elevation of Elevation Elevation Datum Elevation Accuracy Elevation Collection Method Sediment Elevation/Elevation Reference Other Info NHD Reach Code 17110005000176 NHD Reach Measure 35.640041318 NHD FDate 02/26/2012 WRIA 4 - Upper Skagit Ecology Region Northwest Regional Office US Congressional District 1 State Legislative District 39

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