Checklist for Potomac/Mid-Atlantic Hydrologic Observatory

July 7, 2004

Name: Eldon Gemmill

Institution: Baltimore County Department of Environmental Protection and Resource Management (DEPRM)

Number of watersheds:

Patapsco-Back River Basin : 53 sites are distributed throughout 6 watersheds

Gunpowder ≠ Deer Creek Drainages: 56 sites are distributed throughout 7 watersheds

Site Information:

Attached are 3 items as Excel Spreadsheets:

∑ 2003 Stream Baseflow sites above giving drainage areas, % impervious etc.

∑ 2003 Stream Baseflow Sites including Coordinates and Watershed in the Patapsco-Back River Drainage Basin (note some sites are missing)

∑ 2004 Stream Baseflow sites (use Sheet 2) giving ADC map grid and other info in the Gunpowder & Deer Creek Drainage Basins. No drainage areas have been calculated.

For the 2004 site coordinates of the sampling locations, we had sent a file of data & info to Mat Rowe and UMBC for the "Clickable Map" last Feb. so that should be readily available to you. If not, let me know.

We alternate between the above two major drainage basin sets each year so that in 2005 we will be back monitoring the sites in the Patapsco-Back River Basin in Baltimore County.

Parameters being monitored:

At these sites we monitor: stream flow (pigmy meter), water temp., and water quality constituents ( nutrients, metals, pH, chlorides, oxygen, oxygen demand and solids).

Periods of Record:

For the Patapsco-Back River sites the period of record is January 1 ≠ Dec. 31, 2003

For the Gunpowder-Deer Creek sites the period of record is January 1 ≠ Dec. 31, 2004

Frequency of Record:

We aim to monitor each location 6-8 times per year. For 2003 we were only able to collect data 1-5 times per site. 2004 is still in progress.

Title of Project: Baltimore County Water Quality Baseflow Monitoring Program

Objectives:

To provide information on ambient chemical conditions and, over time, to assess trends in both chemical concentrations and chemical loads. The information will be used to better target restoration activities, to provide data for the calibration of pollutant load modeling efforts and TMDL modeling. The program will partially fulfill the restoration effectiveness monitoring required under NPDES Permit Section F.2.

Names of principle investigators on current projects:

Steven Stewart 410-887-4488 X 240

Eldon Gemmill 410-887-4488 X 249