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 25 2025 07:25:23.

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						8171	4809	23298	4706	162	122	1				209	32
2025-04-24	69.5	56.9	24	24	11.3	920	100	3564	138	14						6
2025-04-23	72.9	60.2	24	24	10.4	770	83	1408	64	6	1					11
2025-04-22	70.7	57.9	24	24	10.5	595	66	1624	82	7						8	1
2025-04-21	76.2	63.6	24	24	9.4	552	62	1275	76	1						8
2025-04-20	80.5	67.9	24	24	9.1	326	85	2358	52	2		1				4
2025-04-19	85.9	73.2	24	24	8.3	494	88	1293	56	1						2
2025-04-18	88.5	75.5	24	24	8.1	394	82	564	67	3						4
2025-04-17	88.8	76.0	24	24	7.9	291	249	1141	911	2						6
2025-04-16	88.7	75.8	24	24	8.4	304	41	1473	71							6
2025-04-15	86.6	73.9	24	24	8.8	369	61	1554	76							6
2025-04-14	91.4	78.8	24	24	8.4	452	69	395	72	1						5
2025-04-13	89.9	77.3	24	24	8.6	264	35	998	73							4
2025-04-12	88.2	75.5	24	24	8.3	219	39	662	61							2
2025-04-11	81.0	68.5	24	24	9.5	140	25	1735	87							8
2025-04-10	78.0	65.4	24	24	9.9	296	25	488	77							4
2025-04-09	77.5	64.9	24	24	9.9	140	28	1215	83	1						2	1
2025-04-08	70.3	57.6	24	24	10.6	101	18	203	27							3
2025-04-07	68.3	55.7	24	24	10.9	211	40	280	24	3	1					2	1
2025-04-06	68.5	55.9	24	24	11.2	93	25	48	17	1						5	1
2025-04-05	69.6	57.1	24	24	11.2	66	44	59	16
2025-04-04	71.5	58.9	24	24	10.9	46	56	42	32							2
2025-04-03	71.4	58.7	24	24	10.5	90	80	163	97	2						5
2025-04-02	73.6	6.6	24	24	99.0	105	403	154	470	2	4					5	3
2025-04-01	78.0	6.4	24	24	100.0	124	491	171	622	14	11					3	5
2025-03-31	79.4	7.0	24	24	100.0	207	993	151	647	22	23					7	1
2025-03-30	90.3	6.9	24	24	100.0	295	1031	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 25 2025 07:26:16.

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	8171	353	49	74	110	28	29	4809	321	65	129	116	66	44
2025-04-24	920	23	1	5	14	6	2	100	7	1	1	3	5	7
2025-04-23	770	33	1	3	13	1	5	83	7	1	2	4	10	3
2025-04-22	595	16	3	4	7	2	2	66	7		2	6	7	4
2025-04-21	552	35	3	5	6	3	3	62	8	2	1	4	11	4
2025-04-20	326	28	2	7	4		1	85	10	1	2	2	1	5
2025-04-19	494	43	1	6	4	1		88	3		5	6	3	2
2025-04-18	394	24	2	5	5	1		82	5	4	4	6	2	7
2025-04-17	291	13	1	4	7		1	249	7	2	3	4	3	1
2025-04-16	304	1	5	6	5		1	41		3	9	4	2
2025-04-15	369	6	2	1	2	1	2	61	1	2	6	6	1	4
2025-04-14	452	2	3	4	1	1	2	69		1	19	4	1
2025-04-13	264	2		3			2	35		2	10	1	2	4
2025-04-12	219	5	1		1		1	39	3	5	11	4	1	2
2025-04-11	140	3		2				25	3	2	12	8		1
2025-04-10	296	2			5		1	25	7	4	10	12	2
2025-04-09	140	4	2		4	3	1	28	11	5	3	5	5
2025-04-08	101	4		1	4	1	1	18	14	3	1	9	3
2025-04-07	211	3		1	3		2	40	17	5	3	5	2
2025-04-06	93	1			3		2	25	6	1	2	2	3
2025-04-05	66	4		1	4	3		44	7	1		6	1
2025-04-04	46	4			5	2		56	14		1	9	1
2025-04-03	90	3			3	2		80	15	1		2
2025-04-02	105	19	2	5	7			403	49	8	5	3
2025-04-01	124	23	4	5		1		491	60	4	12	1
2025-03-31	207	7	7	1	2			993	26	4	2
2025-03-30	295	17	5	3				1031	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	23298	774	266	336	178	85	261	4706	649	101	102	289	43	124
2025-04-24	3564	31	26	29	22	12	49	138		1		6	2	2
2025-04-23	1408	105	21	46	20	16	49	64	3	1	5	13	3	7
2025-04-22	1624	102	18	36	15	20	39	82	3	1	1	6	2	5
2025-04-21	1275	51	21	30	17	9	37	76	4		5	7	1	3
2025-04-20	2358	44	18	28	7	3	18	52	4	6	2	2		3
2025-04-19	1293	46	33	34	5	4	13	56	6	2	4	5	5	3
2025-04-18	564	72	26	23	6	5	18	67	4	6	5	4	3	6
2025-04-17	1141	39	21	24	1	3	4	911	5	4	1	5	3	7
2025-04-16	1473	9	14	22	2	2	7	71	1	4	9	3	4	13
2025-04-15	1554	13	9	14	2	2	8	76	4	6		4	4	19
2025-04-14	395	19	11	9	2	1	6	72	3	2	1	6	3	27
2025-04-13	998	9	5	6	1	1	7	73	2	1	3	3	3	12
2025-04-12	662	10	6	7	7		3	61	3	2	8	7	2	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	162	4			1			122	1		1
2025-04-24	14
2025-04-23	6				1			1			1
2025-04-22	7
2025-04-21	1
2025-04-20	2
2025-04-19	1
2025-04-18	3
2025-04-17	2
2025-04-16
2025-04-15
2025-04-14	1
2025-04-13
2025-04-12
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

2025 Juvenile Sockeye 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	1
2025-04-20	1

Query Notes

DART PIT Tag and ESU Metadata & Glossary