Listing ID: 3737

Main Listing Information

3737
SPOKANE RIVER
Water
Temperature
None
Aquatic Life - Salmonid Spawning, Rearing, and Migration
5 Category Color
YearCategory
20185
20125
20105
20085
20045
1998N
1996Y

Assessment Unit

17010305000012_001_001
2.304 Kilometers
Reach: 17010305000012 0% - 40.9%, Type: Rivers/Streams
Spokane
Middle Spokane

 Assessment Year 
2018
Sampling YearExcursion CountSample CountCriterion/ThresholdAggregateCalculated Value
201731220.0 deg CDaily Max25.1

HISTORICAL INFORMATION

Location ID: 57A150 -- In 2002, between 7/30/2002 and 9/27/2002, the 1-day daily maximum values (1-Dmax) exceeded the criterion for this waterbody (20°C) on 48 of 60 days (80%); The maximum exceedance during this period was 23.6°C on 8/28/2002;

Location ID: 57A150 -- In 2001, between 7/10/2001 and 9/25/2001, the 1-day daily maximum values (1-Dmax) exceeded the criterion for this waterbody (20°C) on 73 of 78 days (94%); The maximum exceedance during this period was 26.2°C on 8/14/2001;

Dept. of Ecology unpublished data from core ambient monitoring station 57A150 (Spokane R. at Stateline Bridge) shows a 7-day mean of daily maximum values of 25.9 for mid-week 14 August 2001.

Hallock (2001) Dept. of Ecology Ambient Monitoring Station 57A150 (SPOKANE RIVER AT STATELINE BRIDGE) shows 8 excursions beyond the criterion out of 63 samples collected between 1993 - 2001.

Cusimano (2001) station 57A150 (Spokane R. at Stateline Bridge) shows 6 excursions beyond the criterion out of 8 samples collected between 06/00 - 09/00.

Dept. of Ecology unpublished data from the Spokane River TMDL at RM 96 shows excursions beyond the criterion from a 7-day mean of maximum daily continuous Hydrolab measurements collected during August 2001.

U.S.Geological Survey data from NWIS database station 12419500 (Spokane R abv Liberty Br. Nr Otis Orchard, WA) shows 1 excursions beyond the criterion out of 10 samples collected between 01/93 - 10/00.

Dept. of Ecology unpublished data from the Spokane River TMDL at RM 96 shows excursions beyond the criterion from continuous Hydrolab measurements collected during 16-17 August 1999.
HISTORICAL INFORMATION

Location ID: 57A150 -- In 2002, between 7/30/2002 and 9/27/2002, the 1-day daily maximum values (1-Dmax) exceeded the criterion for this waterbody (20°C) on 48 of 60 days (80%); The maximum exceedance during this period was 23.6°C on 8/28/2002;

Location ID: 57A150 -- In 2001, between 7/10/2001 and 9/25/2001, the 1-day daily maximum values (1-Dmax) exceeded the criterion for this waterbody (20°C) on 73 of 78 days (94%); The maximum exceedance during this period was 26.2°C on 8/14/2001;

Dept. of Ecology unpublished data from core ambient monitoring station 57A150 (Spokane R. at Stateline Bridge) shows a 7-day mean of daily maximum values of 25.9 for mid-week 14 August 2001.

Hallock (2001) Dept. of Ecology Ambient Monitoring Station 57A150 (SPOKANE RIVER AT STATELINE BRIDGE) shows 8 excursions beyond the criterion out of 63 samples collected between 1993 - 2001.

Cusimano (2001) station 57A150 (Spokane R. at Stateline Bridge) shows 6 excursions beyond the criterion out of 8 samples collected between 06/00 - 09/00.

Dept. of Ecology unpublished data from the Spokane River TMDL at RM 96 shows excursions beyond the criterion from a 7-day mean of maximum daily continuous Hydrolab measurements collected during August 2001.

U.S.Geological Survey data from NWIS database station 12419500 (Spokane R abv Liberty Br. Nr Otis Orchard, WA) shows 1 excursions beyond the criterion out of 10 samples collected between 01/93 - 10/00.

Dept. of Ecology unpublished data from the Spokane River TMDL at RM 96 shows excursions beyond the criterion from continuous Hydrolab measurements collected during 16-17 August 1999.

 Item
Assessment Cycle 2018 - During 2017, at least 2 daily maximum values were large deviations from the criterion magnitude.
Special Condition: Temperature shall not exceed a 1-day maximum (1-DMax) of 20.0 deg C due to human activities.
Data for 2002 does not cover the core critical season for temperature. Maximum temperatures may be higher than observed data; ;

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