1. Henrico County Stream Assessment / Watershed Management Program
October 18, 2004

2. Gathering the Data Habitat Assessments of 440 Miles of Stream
Stream Corridor Inventories of 440 Miles of Stream
Annual Bioassessments

3. Gathering the Data: Habitat Assessments
Used a variation of the habitat assessment in the Georgia Rapid Bioassessment Protocol
Examined 10 parameters for high and low energy streams. Parameters include:
sediment deposition
bank stability
streamside buffer zone width
channel alteration

4. Gathering the Data: Habitat Assessments
Habitat Scores by Number of Reaches

5. Gathering the Data: Stream Corridor Inventories
Conditions and items within the stream corridor were inventoried
These items and conditions include:
Possible illicit discharges
Dump sites
Areas of streambank erosion
Exposed sanitary sewer structures
Stream obstructions

9. Gathering the Data: Bioassessments
Use EPA’s Rapid Bioassessment Protocol
Approximately 20 sites throughout the County have been assessed
Bioassessments conducted at 6 sites each year

11. Using the Data The assessment data is used to:
develop stormwater quality requirements for development projects throughout the County
prioritize stream restoration projects
evaluate the effects of the Stream Assessment / Watershed Management Program
identify sources of impairment related to future TMDLs

12. Using the Data: Stormwater Quality Controls

13. Using the Data: Prioritizing Stream Restoration
Using the assessment results and land use data, stream restoration projects were prioritized. Prioritization criteria include:
Watershed build-out
Upstream impacts
Stream corridor inventory influences
Two of these projects are currently in the design phase
Jamestown Apartments – 1400 linear feet
Henrico Communications Complex – 1300 linear feet

14. Using the Data: Prioritizing Stream Restoration
More specific site evaluations of these prioritized projects are being developed to identify suitable stream impact mitigation projects. Evaluation criteria include:
Length and slope
Drainage area
Construction access limitations
Number of affected property owners
Available stream corridor width
Current land use within stream corridor

15. Using the Data: Evaluating the Program
The sites of the annual bioassessments are selected to provide baseline data for upcoming stream restoration projects as well as buffer and stormwater retrofit projects.
The annual bioassessments also satisfy the monitoring requirement of the County’s VPDES permit.

16. Using the Data: Identifying Pollutant Sources
The stream corridor inventory will be used to identify potential sources of pollutants related to TMDLs
Identification and correction of pollutant sources will be a key component to TMDL implementation plans