Session C4 - If You Remove It, They Will Come...The Maxwell Pond Dam Removal / Black Brook Restoration Success Story

A century-old dam across Black Brook created an impoundment called Maxwell Pond, which was a site for ice harvesting, fishing, swimming and other recreation. Over time, sediment from poorly managed industrial sites accumulated in the pond, which became stagnant and shallow. As a result, the NH Dept. of Environmental Services (DES) added Maxwell Pond to the 2002 Clean Water Act (CWA) section 303(d) list of impaired waters. Stakeholders collaborated for seven years to restore water quality by reducing upstream sediment sources and removal of the dam in 2009. Once Black Brook returned to its free-flowing condition, the dissolved oxygen level rebounded and the brook could once again support its aquatic life designated use. As a result of the improvements, in 2010 DES removed the former Maxwell Pond portion of Black Brook from the state\u27s CWA section 303(d) list of impaired waters for dissolved oxygen. Funds for this $685,000 restoration project were derived from a diverse portfolio of stakeholders that included the City of Manchester, EPA, DES, NH Fish & Game, NH State Conservation Committee, NH Corporate Wetlands Restoration Partnership, American Rivers/NOAA, Gulf of Maine Council/NOAA, Fairpoint Communications, National Grid, Aggregate Industries, Amoskeag Fishways, Dubois & King, Inc., and Trout Unlimited. Thanks to the incredible collaboration and innovative funding strategies employed to restore Black Brook, this project was accepted as a Section 319 Nonpoint Source Program Success Story by the EPA in 2011. In addition to the local community accolades for flood relief, elimination of a public safety hazard, and the state and federal acknowledgement of successful restoration of impaired surface waters in NH, the Black Brook Restoration Project also garnered national attention in 2010. American Rivers selected this project as one of three in the United States to be featured in their Restoring America\u27s Rivers: Preparing for the Future DVD that focused upon flooding, community decision makers, and restoration of vital habitats for fish and wildlife. This presentation will provide attendees with an overview of the dam removal process on Black Brook, the project management and funding collaborations that lead to success, data gathered pre and post-dam removal that demonstrate the return of state and federally listed fish species (Bridle shiners, Sea lamprey, American eel, Tesselated darters, Atlantic salmon) to Black Brook, and geomorphic indicators that demonstrate ongoing channel evolution and a return to the reference condition within the former impoundment

Analysis of charm pair production at the LHC

The DGLAP and CCFM approaches to perturbative QCD evolution have been investigated by examining correlations of charmed hadron pairs in pp collisions at √ s = 7 TeV. The theoretical models are compared to the data taken by the LHCb experiment. Differences in the parton kinematics between the two approaches are discussed. In general a model incorporating NLO diagrams matched to parton showers describes the data best

Restoring Flow in the Beebe River: Implications for Eastern Brook Trout

Wild populations of Eastern Brook trout (Salvelinus fontinalis) have been declining across their historic range. The Beebe River watershed (Campton and Sandwich, NH) possesses an intact, robust population of wild Brook trout. Recent private acquisition of the Beebe River uplands (5,435 acres) by The Conservation Fund includes the creation of a sustainable management plan focusing on preserving this unique population. During 2016, Plymouth State University and NH Fish and Game Department collected demographic, genetic, and movement data to understand the impacts of habitat degradation and fragmentation caused by impassible, human-made barriers. In 2017, five undersized road crossings over headwater tributaries draining into the Beebe River will be replaced with bridges. Monitoring will continue during (2017) and after (2018) culvert replacement to measure the impacts of increased connectivity. We predict that culvert removal will increase fish movement between and within tributaries, providing enhanced access to thermal refuge and spawning habitat, ultimately resulting in increased genetic variation and a decrease in negative impacts of inbreeding as a result of isolation. This project is a unique opportunity to document and track restored habitat connectivity on the genetic structure, demographics, and movement patterns of a wild Brook trout population in northern New England

Freshwater Wetlands Inventory Outreach Activities, West, M

West Environmental, Inc. together with Carex Ecosystem Sciences and Doucet Survey, under contract with the NH Estuaries Project, have identified and mapped potential freshwater wetland mitigation opportunities in nineteen (19) communities that border coastal or estuarine habitats

Petrogenesis and Paleostress Analysis of the Mesozoic Mill Brook Dike Zone in the Mount Dartmouth 7.5\u27 Quadrangle, New Hampshire

Field mapping linked with petrogenetic and brittle structural studies of Mesozoic basalt dikes was performed in the Mount Dartmouth 7.5\u27 Quadrangle, adjacent to the Presidential Range, NH. This was done in hopes of creating a better understanding of the intrusion setting and brittle deformational history of the basalt dikes, particularly in relation to the regional tectonic context. Field work done during the summer of 2014 revealed a 100 meter wide, 7.8 km long zone containing multiple mafic dikes that are exceptionally well exposed at the junction of NH Rt. 115 and the Cherry Mountain road. The largest dike in the zone is approximately 20 meters in width, comparable in size to the largest dikes mapped in the Northeast (Christmas Cove dike, Higganum dike, etc.). The newly named Mill Brook Dike Zone was previously discovered and described by Katherine Fowler-Billings in 1944. The orientation of the Dike Zone is N-S and steeply dipping. Within the zone, the strike and dip of dikes ranges from 207, 63°SE to 178, 79°W to 5, 69°E. The chill margins were approximately 3-5 cm in width, while the core of the dike contained 1-3 cm subhedral plagioclase grains, creating a porphyritic texture. When viewed in thin section, the plagioclase grains show significant core to rim magmatic zoning. Additionally, there is notable alteration of the other minerals, primarily sericite and chlorite alteration. In some samples there is cataclasis of the grains, likely due to hydrothermal alteration during faulting. The Mill Brook dike cuts through the Jurassic Cherry Mountain syenite pluton along the western edge of the quadrangle, but was not observed to crosscut the Jurassic Conway granite in the south of the quadrangle. A regional, dike-parallel N-S, steeply dipping joint set was also discovered. Previous work in the adjacent Mount Washington region found mafic intrusions and associated joints striking (from oldest to youngest) NE-SW and E-W, but found only joints and no dikes striking N-S related to the youngest joint set. Additionally, no E-W striking joints were observed in the Mount Dartmouth quadrangle. Comparison of fracture data between the two areas of greatest outcrop exposure (Upper Falls and the Mill Brook Bridge) revealed restriction of the N-S paleostress field to the Mill Brook area. This indicates local variations in paleostress fields on a much smaller order of magnitude than previously thought. Geochemical data from the Mill Brook Dike Zone shows a fractionation trend, indicating that the N-S striking dikes are of one magmatic suite. The data also show that the Mill Brook Dike Zone is geochemically distinct from other comparably large mafic intrusions in the Northeast, signifying that the Mill Brook Dike Zone did not form as part of the Central Atlantic Magmatic Province (CAMP). The Mill Brook Dike Zone and its joints are likely younger than the Late Cretaceous New England-Quebec igneous province and record a significant period of basalt magmatism during E-W extension in the Cretaceous