Approximately 175,000 acres total with 110,000 acres within the range of the NSO Uneven-age management until early 2000s, then transitioned to even-aged management
Surveys started in early 1990s Very few historic Activity Centers in NSO Database on or adjacent to RRC ownership Many have been determined to be unoccupied or not valid by USFWS (not all of these are correctly represented in the CNDDB) Sacramento Canyon noted for not having NSO Currently there are less than a dozen occupied ACs on or adjacent (within 1.3 miles) to RRC lands.
Of these, there are three that have been surveyed and been found to be unoccupied for 3-4 years that we are awaiting new site abandonment protocols. All the ACs on RRC are in areas not generally considered good habitat (however, one site has fledged two in each of the last 4 years)
Of the six, three that have been surveyed and been found to be unoccupied for 3-4 years that we are awaiting new site abandonment protocols. All the ACs on RRC are in areas not generally considered good habitat (however, one site has fledged two in each of the last 4 years) Adjacent sites include FS LSR sites
We currently have a Survey Waiver (based on Zabel, et al and extensive survey history) issued by USFWS that states we do not have to survey for spotted owls in the Sacramento River Canyon and Trinity County ownership.
Other areas get USFWS endorsed protocol surveys which are reviewed through the THP approval process We frequently use Take Avoidance Scenarios 2 and 3 due to a lack of high quality habitat. We occasionally use Scenario 1.
Less than 5% of the ownership is Nesting-Roosting or High Quality Nesting Roosting habitat The huge majority is foraging/low quality foraging with a some non habitat Heavy snow usually prevents early season activities/disturbance
Survey protocol USFWS endorsed protocol used in non-waiver areas Addition BO surveys conducted where historic NSO are not detected Survey effort RRC designs all surveys based on habitat/topography Contractor used to conduct surveys Annual effort depends on THP demands The few historic ACs are checked annually either by RRC or contractors
Due to low number sites and early season access issues (snow) we do not monitor demography
Weve detected BO on two tracts but they dont seem to have established territories (they may have temporarily displaced one AC) Some illegal marijuana grows but not to the extent as in other regions
We have very few owls Past uneven aged management may not have been good for owls (little nesting roosting habitat at present time) We continue to conduct NSO surveys in non-survey areas We are working with USFWS to extend survey waiver. We have not seen BO colonize this area like they have in other areas.