FPC SMP Annual Reach Survival Estimates
Snake River Basin PIT-tagged Chinook and Steelhead
Trap Release Sites to Lower Monumental Dam Tailrace

This query allows users to review and download annual reach survival estimates of Snake River basin PIT-tagged yearling Chinook and steelhead from trap release sites to Lower Monumental Dam tailrace for years 2004 to current. These data were reported in the FPC Annual Report, smolt monitoring chapter, section H, entitled "Travel Time and Survival Analyses for Hatchery and Trap Releases". Click here for a detailed discussion of this data found in the FPC Annual Report.

Field nameDescription
tagsite_codeTrap tag site code. Codes include: GRNTRP (Grande Ronde River trap), IMNTRP (Imnaha River trap), SALTRP (Salmon River trap), & SNKTRP (Snake River trap)
tagsite_descriptionTrap tag site name.
speciesCh = Chinook & ST = Steelhead
rearcodeRearing code is either H for hatchery and W for wild.
yearMigration year of juvenile pittaged fish used in reach survival estimates (from trap to LMN).
survivalEstimated smolt in-river survival from trap to Lower Monumental Dam using CJS methodology. The majority of the Smolt Monitoring Program (SMP) survival estimates are calculated for evaluation of hydrosystem effects in particular reaches on aggregate PIT-tag populations. These aggregates incorporate all available PIT tags to estimate survival for the run-at-large. Reach survival estimates are divided into short time intervals so that environmental effects such as flow, spill and temperature can be evaluated in relation to survival. Additionally in a few cases, survival is estimated for specific SMP releases of interest such as from large traps or other smolt monitoring facilities (e.g. Snake River Trap or Lower Monumental Dam). Releases from these specific sites of interest are on an annual smolt migration basis.
cill95% lower non- parametric confidence interval
ciul95% upper non- parametric confidence interval

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