Track-a-Cohort Steelhead: SacPAS Sacramento Prediction and Assessment of Salmon

Track-a-Cohort

Provides in-season, real-time data in comparison to data in historical years. Post-season, Track-a-Cohort also provides the latest annual data summaries.

Steelhead

Juveniles in River

Migration Timing — annual data

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Today Percent

Average Percent by 11/03, with 95%CI, of annual emigrating population for juveniles of each species of interest (based on LAD) captured at the following locations and salvaged at SWP and CVP Delta facilities
Species	Red Bluff Diversion Dam	Tisdale RST	Knights Landing RST	Sac Trawl (Sherwood) Catch Index	Chipps Island Trawl Catch Index	Salvage
Steelhead, Unclipped (January-December)
Steelhead, Unclipped (December-March)
Steelhead, Unclipped (April-June)

Calculations generated by SacPAS Migration Timing and Conditions by Cohort and Salvage Timing. Data Courtesy of USFWS, Red Bluff; CDFW via StreamNet and CDEC; USFWS, Lodi.

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Current Catch

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Juveniles in Delta

Delta STARS Survival and Routing Probabilities : Winter-run Chinook as surrogate for Steelhead

Total Loss — Clipped and Unclipped Steelhead

Size (Fork Length) Distribution of Steelhead Loss, Combined

Figure compares density plots that highlight historical (WY1994 to WY2023) size distribution and histogram of current year (WY2024) size distribution by rear type (yellow = unclipped; blue = clipped). Fork lengths below 750 mm were included in dataset.

WY Size (Fork Length) Distribution of Steelhead Loss

Cumulative Loss by BiOp Status and Hydrologic Classification Index

The figure shows cumulative loss by BiOp Status and Hydrological Classification Index (HCI). Each quadrant of the faceted plot includes grey lines for historical years, colored lines (blue for wet years, red for dry years) for years within the BiOp status and HCI type, a black line for the current year, and a dashed horizontal line indicating the current cumulative loss maximum.

GitHub Repo

Loss Single Year Thresholds

GitHub Repo

Minimization of Loss

Annual loss of clipped juvenile steelhead at the salvage facilities and total hatchery juvenile steelhead release numbers for brood years 2016 to 2023*. From 2016 to 2024, average annual % lost to the facilities was 0.153%. Note that release locations and dates, which vary by year, were not considered for this calculation. USBR acquired hatchery release numbers from: CDFW hatchery releases- Calfish.org and USFWS hatchery releases data provided by Kevin Offill, 3/13/2024. Water facility loss data acquired from: SacPAS and reflects Water Year 2017 - 3/12/2024. * BY23 includes all fish released prior to 3/14/2024 (data is preliminary).
BroodYear	Total Hatchery Steelhead Release Number (BY)	Loss of clipped steelhead at the facilities (WY)	% Total Hatchery Release Number Lost to the Facilities	WaterYear
2016	1,019,501	164.29	0.016	2017
2017	811,379	2,462.90	0.304	2018
2018	1,264,939	5,777.70	0.457	2019
2019	1,084,899	659.44	0.061	2020
2020	1,853,751	341.69	0.018	2021
2021	1,676,701	639.79	0.038	2022
2022	1,623,483	3,650.30	0.225	2023
2023	1,592,998	2,576.29	0.162	2024

Related Query

Daily Loss and Export with OMR

Predicted Weekly Loss

Predicted and Observed Weekly Loss — Tillotson Model

Table of Tillotson et al., (2022) model output of predicted weekly losses for Natural-origin Steelhead with model weekly average inputs including observed loss, Old and Middle Rivers (OMR), USGS tidally filtered flow (CFS), combined exports from CVP and SWP facilities (CFS), flow at Sacramento and San Joaquin (CFS), and water temperature at Mallard Island (°C).
WY week	Date	Median weekly predicted loss [lower CI, upper CI]	Observed Data
WY week	Date	Median weekly predicted loss [lower CI, upper CI]	Observed loss	OMR USGS tidally filtered (CFS)	Export, SWP & CVP (CFS)	Avg flow at Sacramento (CFS)	Avg flow at San Joaquin (CFS)	Avg water temperature at Mallard Island (°C)
38	2024-06-16	0.0 [0.0, 148.9]	2.7	-6144.3	5434.9	14704.1	2531.1	20.8
37	2024-06-09	0.0 [0.0, 149.3]	8.7	-6012.9	5633.6	15473.3	2264.4	21.6
36	2024-06-02	0.0 [0.0, 155.9]	6.4	-5717.1	5548.4	15894.7	3185.7	21.2
35	2024-05-26	11.4 [0.0, 192.4]	16.3	-3665.7	4140.4	17635.4	4448.1	20.1
34	2024-05-19	26.0 [0.0, 194.9]	23.8	-1735.0	3211.6	21611.1	8042.5	19.2
33	2024-05-12	39.0 [0.0, 232.3]	28.8	-1188.1	3540.0	24148.7	7460.8	18.5
32	2024-05-05	34.4 [0.0, 192.2]	93.2	-939.7	1469.0	29169.0	4512.3	17.6
31	2024-04-28	47.6 [0.0, 292.9]	123.2	-846.6	1936.4	24835.8	4574.5	17.7
30	2024-04-21	75.8 [0.0, 292.9]	184.7	-880.3	1806.3	31001.4	5082.6	17.5
29	2024-04-14	82.0 [16.3, 284.2]	292.1	154.1	1532.4	31798.2	5372.4	16.3
28	2024-04-07	145.7 [26.0, 660.1]	485.7	-1043.0	2141.3	30951.9	5046.7	15.1
27	2024-03-31	403.4 [56.7, 1040.6]	656.7	-2424.9	4132.7	39568.8	4592.2	14.3
26	2024-03-24	242.8 [34.4, 678.9]	449.9	-3552.1	3750.9	40745.5	5164.6	14.4
25	2024-03-17	132.6 [8.2, 575.9]	189.0	-2051.7	2893.6	42966.7	5248.0	14.1
24	2024-03-10	129.9 [19.9, 575.9]	139.0	-1377.9	3261.9	54301.8	5447.4	12.6
23	2024-03-03	242.8 [24.4, 626.2]	440.6	-3248.6	7551.4	62430.0	9599.1	11.8
22	2024-02-25	222.7 [24.4, 678.9]	374.8	-3432.9	6731.7	66389.4	8099.4	12.6
21	2024-02-18	565.7 [56.7, 1826.3]	860.0	-3310.0	7049.7	65318.1	9071.5	12.0
20	2024-02-11	160.2 [8.2, 555.4]	192.6	-4202.9	6703.1	52035.1	6661.5	11.0
19	2024-02-04	361.1 [26.0, 761.2]	419.0	-4537.1	7296.1	61321.8	7148.5	11.5
18	2024-01-28	143.2 [2.7, 515.4]	217.8	-3189.6	3938.7	39896.8	3793.2	12.1
17	2024-01-21	22.8 [0.0, 220.0]	28.8	-2805.7	3931.6	40931.6	3442.5	10.9
16	2024-01-14	17.3 [0.0, 219.8]	14.3	-5300.0	5388.6	23745.3	1908.5	10.0
15	2024-01-07	8.2 [0.0, 133.7]	40.1	-5512.9	5986.7	16860.8	1859.9	10.4
14	2023-12-31	0.0 [0.0, 99.6]	2.7	-5632.9	5712.0	21761.7	1419.3	11.4
13	2023-12-24	0.0 [0.0, 108.3]	2.7	-7810.0	8251.6	16180.1	1351.6	11.5
6	2023-11-05	0.0 [0.0, 17.3]	0.7	-5124.3	4743.1	8124.5	1629.0	16.4

Adults in Ocean

CWT Smolt-to-Adult — annual data

Related Query

Adults in River

No data sets or products to offer at this time.