Lower Granite Bypass and Spillway Analyses

Data Courtesy of Pacific States Marine Fisheries Commission

PIT Tag Lower Granite Bypass and Spillway Analysis

Lower Granite Bypass and Spillway Juvenile and Adult Daily Summary

Last Update: April 13 2025 07:25:21.

2025 Lower Granite Spillway (GRS) and Bypass (GRJ) Juvenile and Adult Daily Detection Summary
Water and Fish daily averages and totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date	Spill Conditions					Juveniles								Adults
	Outflow (daily avg) kcfs	Spill (daily avg) kcfs	Spill Hours All Bays	Spill Hours Spillbay 1	Percent Spill in Spillbay 1	Chinook		Steelhead		Coho		Sockeye		Chinook		Steelhead		Coho		Sockeye
	Outflow (daily avg) kcfs	Spill (daily avg) kcfs	Spill Hours All Bays	Spill Hours Spillbay 1	Percent Spill in Spillbay 1	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)
Calendar Date	Spill Conditions					Juveniles								Adults
	Outflow (daily avg) kcfs	Spill (daily avg) kcfs	Spill Hours All Bays	Spill Hours Spillbay 1	Percent Spill in Spillbay 1	Chinook		Steelhead		Coho		Sockeye		Chinook		Steelhead		Coho		Sockeye
	Outflow (daily avg) kcfs	Spill (daily avg) kcfs	Spill Hours All Bays	Spill Hours Spillbay 1	Percent Spill in Spillbay 1	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)	Spillway (GRS)	Bypass (GRJ)
YTD Total						2535	3895	5641	2965	125	121					139	31
2025-04-12	88.2	75.5	24	0	0.0	221	39	652	58							2
2025-04-11	80.8	68.2	24	7	2.8	143	25	1735	87							8
2025-04-10	78.0	65.4	24	24	9.9	318	25	488	77							4
2025-04-09	77.0	64.4	24	24	9.9	143	29	1215	83	1						2	1
2025-04-08	70.2	57.5	24	24	10.6	104	19	203	27							3
2025-04-07	68.3	55.7	24	24	10.9	231	42	280	24	3	1					2	1
2025-04-06	68.5	55.9	24	24	11.2	98	25	48	17	1						5	1
2025-04-05	69.8	57.4	24	24	11.2	67	44	59	16
2025-04-04	72.1	59.5	24	24	10.9	50	57	42	32							2
2025-04-03	72.8	57.0	24	24	10.5	93	81	163	97	2						5
2025-04-02	75.6	6.5	24	24	99.0	111	412	154	470	2	4					5	3
2025-04-01	84.5	6.6	24	24	100.0	133	514	171	622	14	11					3	5
2025-03-31	80.6	7.0	24	24	100.0	212	1024	151	647	22	23					7	1
2025-03-30	90.3	6.9	24	24	100.0	304	1069	178	408	28	29					8	3
2025-03-29	95.9	7.9	24	24	100.1	44	214	21	175	21	41					3	3
2025-03-28	93.3	8.4	24	24	100.0	115	182	33	58	30	12					3	3
2025-03-27	90.0	9.5	24	24	99.9	57	55	15	27							4	2
2025-03-26	75.5	9.6	24	24	100.1	24	8	14	18							5	1
2025-03-25	59.1	8.9	24	24	99.8	28	8	14	6							5
2025-03-24	56.3	8.5	24	24	100.0	9	6	2	9							4
2025-03-23	56.2	9.3	24	24	99.9	11	1									3
2025-03-22	53.9	9.1	24	24	99.9	2	1									3
2025-03-21	50.1	9.2	24	24	100.0	1	2									1
2025-03-20	46.4	1.8	5	6	99.8	1										1	2
2025-03-19	54.6	1.9	5	4	99.9		4		1							4	1
2025-03-18	53.1	1.9	5	4	100.2		1		1							4
2025-03-17	55.6	1.7	5	4	99.3	2	2		1								1
2025-03-16	48.3	1.7	5	5	100.3	3	1									1
2025-03-15	49.8	1.7	5	5	99.6	2			1							2	1
2025-03-14	53.8	1.7	5	5	100.2	3	1		1
2025-03-13	54.0	1.8	5	4	100.4	1			1							2	2
2025-03-12	51.2	2.1	6	6	100.0	1	4	2	1	1
2025-03-11	45.8	1.9	6	6	99.7											2
2025-03-10	48.2	1.9	6	6	99.9											2
2025-03-09	48.8	2.2	6	6	100.0
2025-03-08	45.0	2.2	6	6	99.6			1								3
2025-03-07	44.7	2.0	6	6	100.0	1										1
2025-03-06	46.3	2.2	5	6	99.9											1
2025-03-05	53.4	2.1	5	6	100.0	1										6
2025-03-04	51.2	2.0	4	5	99.9											5
2025-03-03	50.1	2.2	5	5	99.7											2
2025-03-02	49.3	2.2	5	5	99.6	1										4
2025-03-01	47.9	2.2	5	5	99.8											12
2025-02-28	47.9	0.0	0	0	0.0
2025-02-27	41.7	0.0	0	0	0.0
2025-02-26	53.2	0.0	0	0	0.0
2025-02-25	57.2	0.0	0	0	0.0
2025-02-24	56.7	0.0	0	0	0.0
2025-02-23	33.6	0.0	0	0	0.0
2025-02-22	32.2	0.0	0	0	0.0
2025-02-21	32.5	0.0	0	0	0.0
2025-02-20	28.3	0.0	0	0	0.0
2025-02-19	23.0	0.0	0	0	0.0
2025-02-18	20.0	0.0	0	0	0.0
2025-02-17	31.5	0.0	0	0	0.0
2025-02-16	31.9	0.0	0	0	0.0
2025-02-15	26.6	0.0	0	0	0.0
2025-02-14	26.7	0.0	0	0	0.0
2025-02-13	33.3	0.0	0	0	0.0
2025-02-12	35.5	0.0	0	0	0.0
2025-02-11	39.3	0.0	0	0	0.0
2025-02-10	33.3	0.0	0	0	0.0
2025-02-09	35.7	0.0	0	0	0.0
2025-02-08	33.0	0.0	0	0	0.0
2025-02-07	29.4	0.0	0	0	0.0
2025-02-06	23.7	0.0	0	0	0.0
2025-02-05	30.8	0.0	0	0	0.0
2025-02-04	31.6	0.0	0	0	0.0
2025-02-03	32.0	0.0	0	0	0.0
2025-02-02	27.2	0.0	0	0	0.0
2025-02-01	32.2	0.0	0	0	0.0
2025-01-31	26.6	0.0	0	0	0.0
2025-01-30	25.2	0.0	0	0	0.0
2025-01-29	24.7	0.0	0	0	0.0
2025-01-28	27.0	0.0	0	0	0.0
2025-01-27	29.5	0.0	0	0	0.0
2025-01-26	28.0	0.0	0	0	0.0
2025-01-25	27.4	0.0	0	0	0.0
2025-01-24	27.8	0.0	0	0	0.0
2025-01-23	28.1	0.0	0	0	0.0
2025-01-22	29.5	0.0	0	0	0.0
2025-01-21	28.9	0.0	0	0	0.0
2025-01-20	31.6	0.0	0	0	0.0
2025-01-19	30.5	0.0	0	0	0.0
2025-01-18	34.4	0.0	0	0	0.0
2025-01-17	32.3	0.0	0	0	0.0
2025-01-16	30.2	0.0	0	0	0.0
2025-01-15	32.6	0.0	0	0	0.0
2025-01-14	35.1	0.0	0	0	0.0
2025-01-13	34.1	0.0	0	0	0.0
2025-01-12	38.3	0.0	0	0	0.0
2025-01-11	35.8	0.0	0	0	0.0
2025-01-10	35.1	0.0	0	0	0.0
2025-01-09	36.6	0.0	0	0	0.0
2025-01-08	40.7	0.0	0	0	0.0
2025-01-07	39.8	0.0	0	0	0.0
2025-01-06	35.0	0.0	0	0	0.0
2025-01-05	35.6	0.0	0	0	0.0
2025-01-04	32.7	0.0	0	0	0.0
2025-01-03	32.1	0.0	0	0	0.0
2025-01-02	30.9	0.0	0	0	0.0
2025-01-01	27.4	0.0	0	0	0.0

Lower Granite Bypass and Spillway Juvenile Downstream Detections Summary by Species

Last Update: April 13 2025 07:26:12.

2025 Juvenile Chinook Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date	Spillway and then Downstream, Unique TagIDs Detected							Bypass and then Downstream, Unique TagIDs Detected
Calendar Date	Spillway (GRS)	Little Goose	Lower Monumental	Ice Harbor	McNary	John Day	Bonneville	Bypass (GRJ)	Little Goose	Lower Monumental	Ice Harbor	McNary	John Day	Bonneville
YTD Total	2535	126	25	21	42	12	8	3895	269	45	67	66	18	3
2025-04-12	221	4	1		1		1	39	3	4	12	4	1	2
2025-04-11	143	3		2				25	3	2	13	8		1
2025-04-10	318	2			5		1	25	7	4	10	12	2
2025-04-09	143	4	2		4	3	1	29	13	5	3	5	5
2025-04-08	104	4		1	4	1	1	19	14	3	1	9	3
2025-04-07	231	3		1	3		2	42	17	5	3	5	2
2025-04-06	98	1			3		2	25	7	1	2	2	3
2025-04-05	67	4		1	4	3		44	7	1		6	1
2025-04-04	50	4			5	2		57	14		1	9	1
2025-04-03	93	3			3	2		81	15	1		2
2025-04-02	111	19	2	5	7			412	49	8	5	3
2025-04-01	133	23	4	5		1		514	60	4	12	1
2025-03-31	212	7	7	1	2			1024	26	4	2
2025-03-30	304	17	5	3				1069	13	2	2
2025-03-29	44	15	2	2				214	18	1	1
2025-03-28	115	8						182
2025-03-27	57	3	1					55	1
2025-03-26	24	1						8	2
2025-03-25	28							8
2025-03-24	9				1			6
2025-03-23	11							1
2025-03-22	2	1						1
2025-03-21	1							2
2025-03-20	1		1
2025-03-19								4
2025-03-18								1
2025-03-17	2							2
2025-03-16	3							1
2025-03-15	2
2025-03-14	3							1
2025-03-13	1
2025-03-12	1							4
2025-03-11
2025-03-10
2025-03-09
2025-03-08
2025-03-07	1
2025-03-06
2025-03-05	1
2025-03-04
2025-03-03
2025-03-02	1

2025 Juvenile Steelhead Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date	Spillway and then Downstream, Unique TagIDs Detected							Bypass and then Downstream, Unique TagIDs Detected
Calendar Date	Spillway (GRS)	Little Goose	Lower Monumental	Ice Harbor	McNary	John Day	Bonneville	Bypass (GRJ)	Little Goose	Lower Monumental	Ice Harbor	McNary	John Day	Bonneville
YTD Total	5641	234	43	34	78	7	6	2965	610	67	66	225	9	17
2025-04-12	652	10	6	6	7		3	58	3	2	8	7	1	11
2025-04-11	1735	7	1	2	3		1	87	2	4	4	9	1	1
2025-04-10	488	5	2	5	8	3		77	2	4	9	27	1
2025-04-09	1215	5	5	6	25			83	5	1	5	80	5	3
2025-04-08	203	1	1	4	16	1	1	27	4	5	6	40		1
2025-04-07	280	2	2	1	11		1	24	3	6	8	30
2025-04-06	48	5	2	3	5	1		17	7	4	8	14
2025-04-05	59	1	2	1	1	1		16	10	2	5	6		1
2025-04-04	42	8	1		1			32	14	1	1	5
2025-04-03	163	23	2		1	1		97	50	3	2	4
2025-04-02	154	66	4	3				470	266	14	6	1
2025-04-01	171	72	4	2				622	180	8	2	1	1
2025-03-31	151	7	4					647	41	8		1
2025-03-30	178	10	3	1				408	8	2
2025-03-29	21	6	3					175	7	2
2025-03-28	33	6	1					58	4
2025-03-27	15							27	2
2025-03-26	14							18	1
2025-03-25	14							6			2
2025-03-24	2							9
2025-03-23
2025-03-22										1
2025-03-21									1
2025-03-20
2025-03-19								1
2025-03-18								1
2025-03-17								1
2025-03-16
2025-03-15								1
2025-03-14								1
2025-03-13								1
2025-03-12	2							1
2025-03-11
2025-03-10
2025-03-09
2025-03-08	1

2025 Juvenile Coho Downstream Detections
Fish daily totals calculated from hourly timestamps in Pacific Time with daylight savings
Calendar Date	Spillway and then Downstream, Unique TagIDs Detected							Bypass and then Downstream, Unique TagIDs Detected
Calendar Date	Spillway (GRS)	Little Goose	Lower Monumental	Ice Harbor	McNary	John Day	Bonneville	Bypass (GRJ)	Little Goose	Lower Monumental	Ice Harbor	McNary	John Day	Bonneville
YTD Total	125	4						121	1
2025-04-11									1
2025-04-10
2025-04-09	1
2025-04-08
2025-04-07	3	1						1
2025-04-06	1
2025-04-05
2025-04-04
2025-04-03	2
2025-04-02	2							4
2025-04-01	14	3						11
2025-03-31	22							23
2025-03-30	28							29
2025-03-29	21							41
2025-03-28	30							12
2025-03-27
2025-03-26
2025-03-25
2025-03-24
2025-03-23
2025-03-22
2025-03-21
2025-03-20
2025-03-19
2025-03-18
2025-03-17
2025-03-16
2025-03-15
2025-03-14
2025-03-13
2025-03-12	1

Query Notes

DART PIT Tag and ESU Metadata & Glossary