Rose Valley Lake Survey

Elaine Langone Center, Terrace Room

Rose Valley Lake is 369-acre man-made reservoir located in Lycoming County and managed by the PA Fish and Boat Commission for recreational fishing and boating. Since 2000, the Lycoming College Clean Water Institute (CWI) has been a partner with the Loyalsock Creek Watershed Association to complete the chemical and biological assessment of the lake. A major part of this assessment is the determination of the trophic state of the reservoir. This involves measurement of chemical and biological parameters following the protocols of Carlson’s Trophic State Index as outlined in the Secchi Dip-In. Rose Valley lake was sampled on June 9, 2017 for this year’s assessment at 2 sites. The trophic State Index is calculated based in the Secchi Disc depth, chlorophyll and total phosphorous. For the last decade, the lake has been changing from mesotrophic to eutrophic and this year may have changed to a higher level with a TSI of 71. In addition, zooplankton samples were taken and show a dominance of rotifers especially Keratella.