2010-11 Presumpscot River Lower Main Stem Monitoring Cayce Dalton FB Environmental Associates 97A Exchange St, Portland ME 04101 November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Project Overview • Coalition interested in reclassification C to B. • Monitored dissolved oxygen in Presumpscot R. lower main stem, with help from CBEP and Sarah Hayes (USM student). November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Watershed Overview • Sampling between Cumberland Mills Dam and head of tide / falls. Map: Friends of Presumpscot R. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Monitoring Locations P2 – Upstream P1 – Downstream 19T 0396401 19T 0393146 4842549 4839538 November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Site P2 (US 302 Bridge) Site P2, upstream from US Route 302 bridge (seen at extreme right) at the Portland-Westbrook municipal boundary. Marker float for deployment site at lower left of photo. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Site P1 (Falmouth Spur, Turnpike) Looking downstream to site P1, with deployment site marked by a small float. Maine Turnpike Falmouth Spur bridge in background. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Monitoring Methods • Sondes deployed near stream bottom • 15 min frequency • DO (conc. & %) • Temp & sp. cond. • Approx. depth November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
Monitoring Action P1 - Downstream P2 - Upstream Duration Timeline Deployed 7/30/2010 17:45 7/30/2010 16:00* 25 days Retrieved 8/25/2010 12:30 8/25/2010 10:45* • 3 deployments Deployed 8/25/2010 12:45 8/25/2010 11:15 22 days Retrieved 9/16/2010 11:30 9/16/2010 10:00 • 2 sites Deployed 9/16/2010 12:15 9/16/2010 10:45 22 days Retrieved 10/8/2010 15:00 10/8/2010 14:00 • 2010 : * DO membrane punctured during deployment Late July – Action P1 - Downstream P2 - Upstream Duration Early Oct. Deployed 7/13/2011 15:02 7/13/2011 13:17 22 days • 2011 : Retrieved 8/4/2011 12:17 8/4/2011 10:02 Deployed 8/4/2011 14:17** 8/4/2011 11:17 Mid July – 20 days Retrieved 8/24/2011 13:32** 8/24/2011 11:32 Late Sept. Deployed 8/24/2011 14:17 8/24/2011 12:32 34 days Retrieved 9/27/2011 11:47 9/27/2011 10:32 ** DO probe failure during deployment November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2010 Data 2010 Data Results Weighted cage to keep sonde near stream bottom. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2010 Data 2010 Data Results Weighted cage to keep sonde near stream bottom. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2011 Data 2011 Data November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2011 Data 2011 Data November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2010 Data 2010 Data Dissolved Oxygen (ppm) 7ppm DO November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2010 Data 2010 Data Dissolved Oxygen (ppm) 7ppm DO Outliers, considered measurement errors. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
2010 Data 2010 Data Dissolved Oxygen (ppm) 7ppm DO Big picture: Dissolved oxygen generally good, Was close to 7 ppm briefly. November 17, 2011 2010-11 Presumpscot River FB Environmental Lower Main Stem Monitoring
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