Operational Plan for the Restoration of Diadromous Fishes to the ...

incorporate further refinements until the design takes into account the many factors
that influence sampling in the Penobscot basin.
Penobscot Watershed Survey Design
Description of Sample Design for Panel Design
Target population: All perennial streams/rivers in the Penobscot basin, with the exception
of the West Branch Penobscot and Webster Brook, which are both inaccessible to
Atlantic salmon.
Sample Frame: GIS stream network coverage from NHD High resolution dataset
developed by USGS. In addition, Atlantic salmon habitat modeled data based on
NHD High was used for attribute data.
Survey Design: A Generalized Random Tessellation Stratified (GRTS) survey design for a
linear stream resource was used. The GRTS design includes reverse hierarchical
ordering of the selected sites.
Multi-density categories: Estimated stream widths based on hydrologic curves: 0-12, 12-24,
and >24 m.
Stratification: Stratify by Dam Reaches- portions of the basin sharing the same damrelated
mortality for migrating smolts and adult Atlantic salmon.
Panels: Three panels. Year_1 sites will be visited in year 1 and then year 4, year 7,
etc. Year_2 sites will be visited in year 2, year 5, year 8, etc. Year_3 sites will be
visited in year 3, year 6, year 9, etc. Year_Every sites will be visited every year.
Expected sample size: Ten sites per strata annually with an additional 10 rotating sites for a
total of 20 annually per strata. Sampling distributed across stream width classes as
"0-12"=15, "12-24"=15, ">24"=10.
Oversample: 80 sites
Site Use: The base design has 20 sites per stratum per year. Sites are listed in SiteID
order and must be used in that order. All sites that occur prior to the last site used
must have been evaluated for use and then either sampled or reason documented
why that site was not used. As an example, if 30 sites are to be sampled in the
stratum, then the first 30 sites in SiteID order would be used.
Sample Frame Summary
The total stream length (km) is 9976.5296 km.
Stream length by Strata and Stream Class
Stream
Class
Above
Medway
Brown's Mill
to Howland
Gilman to
Stillwater
Gilman to
West Lowell
Tannery
Guilford to
Moosehead
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PRFP Page 195