| 1 | 08LAK31... Site Code: 08LAK3121Idylwood CreekW Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...7/29/2025
Ambient Monitoring
King County - DNRP | 40 | 1 | 1 | 5 | 7 | 13 | 6 | 0 | 46.3% | 8.0% | 31.6% | 326 | 30.3 | 4.5 | 0.0 | 0.0 | 5.0 | 3.5 | 5.0 | 0.0 | 6.1 | 3.5 | 2.7 | Details |
| 2 | IdylRed16...Site Code: IdylRed168Idylwood CreekW Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Annu...8/5/2025
Annual Benthos Monitoring: 2016 - Ongoing
City of Redmond | 40 | 1 | 1 | 2 | 4 | 10 | 2 | 0 | 41.4% | 3.4% | 29.4% | 500 | 19.3 | 4.5 | 0.0 | 0.0 | 1.2 | 1.8 | 0.0 | 0.0 | 7.5 | 1.2 | 3.2 | Details |
| 3 | IdylwoodA...Site Code: IdylwoodArdmore_21Idylwood CreekW Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Macr...7/10/2025
Macroinvertebrates
City of Bellevue | 38 | 1 | 1 | 3 | 5 | 10 | 5 | 0 | 53.6% | 3.6% | 31.4% | 500 | 20.0 | 3.8 | 0.0 | 0.0 | 2.5 | 1.8 | 3.8 | 0.0 | 4.2 | 1.3 | 2.7 | Details |
| 4 | LC-1, Lew...Site Code: LC-1Lewis Creek (Lake Sammamish)W Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Aquat...7/18/2025
Aquatic Resources Monitoring
City of Issaquah | 47 | 4 | 5 | 6 | 15 | 18 | 8 | 1 | 36.8% | 5.2% | 5.4% | 500 | 58.1 | 6.9 | 4.3 | 5.7 | 6.2 | 6.5 | 7.5 | 1.4 | 8.7 | 2.1 | 8.7 | Details |
| 5 | LC-2, Lew...Site Code: LC-2Lewis Creek (Lake Sammamish)W Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Aquat...7/18/2025
Aquatic Resources Monitoring
City of Issaquah | 36 | 3 | 3 | 4 | 10 | 15 | 7 | 0 | 47.6% | 4.8% | 27.8% | 500 | 34.7 | 3.1 | 2.9 | 2.9 | 3.8 | 4.7 | 6.2 | 0.0 | 5.8 | 1.9 | 3.5 | Details |
| 6 | LewisBelo...Site Code: LewisBelowLakemont_21Lewis Creek (Lake Sammamish)W Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Macr...7/21/2025
Macroinvertebrates
City of Bellevue | 31 | 1 | 5 | 2 | 8 | 11 | 8 | 0 | 52.8% | 4.0% | 31.4% | 500 | 26.8 | 1.4 | 0.0 | 5.7 | 1.2 | 2.4 | 7.5 | 0.0 | 4.4 | 1.5 | 2.7 | Details |
| 7 | LewisBel...Site Code: LewisBelRM0.3Lewis Creek (Lake Sammamish)W Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Macr...8/28/2025
Macroinvertebrates
City of Bellevue | 32 | 3 | 3 | 6 | 12 | 14 | 4 | 0 | 68.6% | 1.0% | 9.6% | 500 | 28.2 | 1.7 | 2.9 | 2.9 | 6.2 | 4.1 | 2.5 | 0.0 | 0.1 | 0.0 | 7.8 | Details |
| 8 | LewisBel...Site Code: LewisBelRM0.8Lewis Creek (Lake Sammamish)W Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Macr...7/9/2025
Macroinvertebrates
City of Bellevue | 41 | 3 | 3 | 5 | 11 | 15 | 6 | 1 | 48.0% | 2.4% | 4.0% | 500 | 42.1 | 4.8 | 2.9 | 2.9 | 5.0 | 4.7 | 5.0 | 1.4 | 5.7 | 0.7 | 9.1 | Details |
| 9 | LewisBel...Site Code: LewisBelRM2.1Lewis Creek (Lake Sammamish)W Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Macr...7/21/2025
Macroinvertebrates
City of Bellevue | 45 | 2 | 6 | 6 | 14 | 15 | 10 | 0 | 42.0% | 9.4% | 8.2% | 500 | 55.3 | 6.2 | 1.4 | 7.1 | 6.2 | 4.7 | 10.0 | 0.0 | 7.3 | 4.2 | 8.1 | Details |
| 10 | 08LAK28...Site Code: 08LAK2827Vasa CreekW Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...9/15/2025
Ambient Monitoring
King County - DNRP | 31 | 2 | 3 | 2 | 7 | 11 | 4 | 0 | 66.4% | 1.6% | 22.4% | 500 | 17.6 | 1.4 | 1.4 | 2.9 | 1.2 | 2.4 | 2.5 | 0.0 | 0.7 | 0.3 | 4.8 | Details |
| 11 | VasaRM1....Site Code: VasaRM1.9Vasa CreekW Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Macr...7/9/2025
Macroinvertebrates
City of Bellevue | 33 | 1 | 3 | 5 | 9 | 7 | 6 | 0 | 58.7% | 6.0% | 18.2% | 499 | 26.0 | 2.1 | 0.0 | 2.9 | 5.0 | 0.0 | 5.0 | 0.0 | 2.8 | 2.5 | 5.8 | Details |
| 12 | VillaRed1...Site Code: VillaRed124Villa Marina CreekW Lake Sammamish SubbasinSammamish River BasinWRIA 8 - Cedar-Sammamish | 2025, Annu...8/5/2025
Annual Benthos Monitoring: 2016 - Ongoing
City of Redmond | 24 | 1 | 0 | 1 | 2 | 7 | 6 | 0 | 69.4% | 3.2% | 6.8% | 500 | 14.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5.0 | 0.0 | 0.0 | 1.1 | 8.4 | Details |