C150240 Vegitation Montioring Analysis

Home Browse Search

I I Yearly Pool Elevations The reservoir begins releasing water and dropping below the new high water line at varying times I during the growing season, depending on water user's needs. In general it takes approximately one month for the reservoir surface water elevation to drop from full pool to below the restricted I water line. Pool elevations for 2011, 2012, and 2014 are found in Table 2. In 2013, the reservoir was not filled due to maintenance that was being done on the dam. Table 2. Bull Creek Reservoir#4 pool elevations for 2011, 2012, and 2014. Pool Pool Pool Date Elevation Date Elevation Date Elevation I (ft msl) _ _ift msl) (ft msl) 7/8/11 9,864.00 6/8/12 9,864.00 6/28/14 9,864.00 7/15/11 9,863.00 6/16/12 9,861.81 7/5/14 9,862.65 t 7/22/11 9,860.75 6/23/12 9,861.61 7/12/14 9,860.05 7/29/11 9,858.03 6/30/12 9,859.52 7/19/14 9,856.90 8/5/11 9,854.5 7/7/12 9,857.9 7/26/14 9,853.05 I 8/12/11 9,850.73 7/14/12 9,856.7 8/2/14 9,848.55 8/20/11 9,847.79 7/21/12 9,854.4 8/9/14 9,848.00 8/27/11 9,845.07 7/28/12 9,851.9 I 9/2/11 9,840.00 8/4/12 9,852.6 *Bold numbers are the approximate dates the water level dropped below the restricted water level (John Groo, President,BCRCPC,pers comm.).The high water level elevation is 9,864 feet and the restricted water level elevation I is 9,857.5 feet. Vegetation I Descriptions of vegetation are based on 2014 observations. Two main types of wetland vegetation were present around the perimeter of the reservoir: carex-dominated emergent wetland and I willow-dominated shrub wetland. Areas of fen (defined as ground water fed wetland containing saturated histosol soils) are present around the reservoir's perimeter. The same types of dominant vegetation are present in the fen. Fen boundaries were delineated in 2009 by WestWater biologists. At the lowest elevations below the new high water mark, wetland was dominated by carex species Iand is classified as an emergent wetland. This wetland type was present around the perimeter except at the dam, which is fortified with riprap. Common plant species observed were Northwest Territory sedge (Carex utriculata), water sedge (Carex aquatilus), and common Ispikerush (Eleocharis palustris). The willow-dominated wetland is located immediately adjacent to the emergent wetland on the west and south sides of the reservoir. The willow-dominated wetland consisted of a thick willow I canopy with scattered grass and carex species found in the understory. Common plant species observed were park willow (Salix monticola), diamondleaf willow (Salix planifolia), Geyer willow (Salix geyeriana), bluejoint (Calamagrostis canadensis), and Northwest Territory sedge I (Carex utriculata). WestWater Engineering Page 3 of 14 February 2015 I