Hydrologic Data Collection is an environmental consulting firm established in 2001 that specializes in water resource monitoring. The company has over 350 years of combined experience from the USGS and private sector. It provides services such as surface water monitoring, water quality monitoring, groundwater monitoring, and TMDL studies. Hydrologic Data Collection aims to collect and analyze high quality data rapidly and cost-effectively for its clients.

1. Copyright 2010, Hydrologic Data Collection, LLC
Monitoring OurMonitoring Our
Water ResourcesWater Resources™™
Company Overview

2. Copyright 2010, Hydrologic Data Collection, LLC
Knowledge and ExpertiseKnowledge and Expertise
• Established in 2001
• Team of Hydrologists,
Chemists, Biologists and
Professional Geologists
• Over 350 years of USGS
experience
• Over 50 years of private
sector experience
• 2 former USGS senior
hydrologists
• 9 former USGS senior
hydrologic technicians
Providing a total solution for water resource monitoring

3. Copyright 2010, Hydrologic Data Collection, LLC
Company MissionCompany Mission
High Quality Data
• Collect and analyze data
using proven methods
developed by the USGS
Rapid Turnaround
• Deliver finalized data within
one week of site visits, and
provide real-time data
access
Cost-effective
Rates
• Provide high-value services
within our customers’
project budgets

4. Copyright 2010, Hydrologic Data Collection, LLC
Surface WaterSurface Water
• Install and operate
stream flow gaging
stations
• Conduct discharge
measurements
• Develop stage vs.
discharge ratings
• Compute unit and
daily values of
discharge
• Assist in NPDES, MFL,
TMDL, and time-of-
travel studies

5. Copyright 2010, Hydrologic Data Collection, LLC
Water QualityWater Quality
• Installation of real-time
monitoring sites
• Manual or continuous
WQ monitoring
• Calibration and ongoing
site service
• Vertical profiling
• Automated and flow-
weighted sampling
• Stormwater sampling
• Pollutant concentrations

6. Copyright 2010, Hydrologic Data Collection, LLC
GroundwaterGroundwater
• Equipment installation
and service
• Manual or continuous
monitoring
• Real-time ground
water networks
• Low-flow sampling

7. Copyright 2010, Hydrologic Data Collection, LLC
TMDL StudiesTMDL Studies
• Watershed assessments
– Surface water (flow, stage)
– Surface water quality
– Groundwater quality and
recharge rates
• Data to develop and
calibrate hydrologic models
• Fill data gaps
– Informational (e.g. no flow
data)
– Temporal (e.g. data only
collected during a drought)
– Spatial (e.g. not enough
monitoring points to give
the complete picture)

8. Copyright 2010, Hydrologic Data Collection, LLC
TMDL StudiesTMDL Studies
• Determining pollutant
loads
– Stage data
– Rating curve
– Daily average flow
– Pollutant
concentration
• Duration curves
• Models are only as
good as the original
quality/quantity of
data used
• Models need regular
recalibration

9. Copyright 2010, Hydrologic Data Collection, LLC
TMDL StudiesTMDL Studies
Total Phosphorus Load Duration Curve
0.0
0.1
1.0
10.0
100.0
1000.0
10000.0
0 10 20 30 40 50 60 70 80 90 100
Percent of Days Flow Equaled or Exceeded (%)
MeanDailyStreamflow(cfs)
Higher Loads Lower Loads
Discharge of 36.4 cfs is equalled
or exceeded 60% of the time
Black Line - flow duration curve for the station's period of record
Red line - load duration curve for the parameter standard
Blue line - load duration curve allowing for a 10% safe margin
▲ - Water quality samples as loads plotted using the flow duration
at which they were sampled.
Points above the curve represent exceedance
of standards and allowable loadings

10. Copyright 2010, Hydrologic Data Collection, LLC
Stormwater and MeteorologicalStormwater and Meteorological
MonitoringMonitoring
• Water Quantity
• Water Quality
• Rainfall
• Humidity
• Wind speed and
direction
• Evaporation
• BMP Efficiency

11. Copyright 2010, Hydrologic Data Collection, LLC
Stream Restoration MonitoringStream Restoration Monitoring
• Effectiveness
evaluations

12. Copyright 2010, Hydrologic Data Collection, LLC
Other ServicesOther Services
• Dam and reservoir
monitoring
• Wetland and marsh
monitoring
• Tide and coastal
monitoring
• Time-of-travel studies
• Reactivation of
decommissioned
gages
• Crest stage and flood
monitoring

13. Copyright 2010, Hydrologic Data Collection, LLC
Methodology and EquipmentMethodology and Equipment
• Follow established
USGS protocols
• Use cutting-edge
technology
• Expertise in all major
instrumentation
• Full installation and
service capability
• Years of training and
field experience
• Data is collected to
USGS standards

14. Copyright 2010, Hydrologic Data Collection, LLC
Data Services – Surface WaterData Services – Surface Water
• Daily discharge tables
• Rating tables
• Rating curve sheets
• Summary of discharge
measurements
• Unit values
hydrograph
• Daily discharge
hydrograph
• Flow duration curves

15. Copyright 2010, Hydrologic Data Collection, LLC
Data Services – Water QualityData Services – Water Quality
• Real-time data,
condition alarming,
and web hosting
• Calibration records
• Tabular unit and
daily values for
each parameter

16. Copyright 2010, Hydrologic Data Collection, LLC
Representative ClientsRepresentative Clients

17. Copyright 2010, Hydrologic Data Collection, LLC
Value of Working with HDCValue of Working with HDC
• Unmatched experience
• High quality data
• Professional service
• Timely delivery of data
• Customized solutions
• A lower cost alternative

18. Copyright 2010, Hydrologic Data Collection, LLC
Company Locations andCompany Locations and
Main Contact InformationMain Contact Information
Florida Office
John Coffin
President and Sr. Hydrologist
USGS - Retired
5706 Ternwater Place
Lithia, FL 33547
813-299-1108
john.coffin@hydrologicdata.com
Virginia Office
Rob Mooney
Vice President
805 Vassar Road
Alexandria, VA 22314
202-341-9811
rob.mooney@hydrologicdata.com