Details
Lake Tahoe EIP
Performance Measure Info Sheet
Miles of Roads Decommissioned or Retrofitted
Performance Measure 5 - Miles of Roads Decommissioned or Retrofitted
Definition The amount of city, county, state and federal roads that are retrofitted or obliterated to reduce stormwater pollution through capital improvements. This PM is reported in three categories of treatment priority based on water quality risk. Treating high-priority roads reduces stormwater pollution and cost-effectively improves the clarity of Lake Tahoe.

IMPORTANT: Operations and maintenance activities are captured by other PMs and should not be reported under this PM.
Units miles
Primary Program Stormwater Management
Guidance
Critical Definitions

Treated – Roads are considered treated when they have been decommissioned or retrofitted to reduce stormwater runoff and/or pollution.

  • Decommissioned – Roads are decommissioned when they are removed (obliterated) from use permanently and restored.
  • Retrofitted (paved road) – A section of paved road is considered retrofitted to reduce stormwater runoff and pollution if all of its runoff infiltrates, or if drainage conveyance and treatment facilities or source controls are installed to collect and treat its runoff and are maintained such that they are functioning as designed.
  • Retrofitted (unpaved road) – A mile of unpaved road is considered retrofitted if:
    1. BMPs have been designed and implemented to disconnect road runoff and prevent sediment transport to water bodies,
    2. stream crossings can pass the 100-year storm, and
    3. hydraulic length of individual road segments has been shortened to increase sustainability of the road surface. BMPs should not require maintenance more frequently than every two years, except for in the case of damage caused by extreme storm events.
Accounting Period and Scale

Information for this PM is reported into the EIP Database following the completion of road treatment projects, and should be done by December of each year. 

Project Reporting

A project is considered reportable as soon as water can flow through the newly installed improvements made as part of the project, and is being treated as designed.

This PM tracks capital improvements made to roads to reduce stormwater volume and pollution. Operations and maintenance activities are captured in the Miles of Street Sweeping PM.

This PM currently tracks the number of roadway miles treated with capital stormwater improvements each year, regardless of whether those miles of road have previously been treated. Thus, the number of miles treated for each subcategory and for this PM in general may, over time, exceed the total number of miles in the basin. If it is necessary or desired to track initial vs. subsequent treatments, a subcategory should be added to differentiate between these two.

Roads are treated by either obliterating (or removing) them, decomissioning then, or by installing retrofits to prevent stormwater runoff and pollution. This allows three different treatment types to be reported with one PM.

Subcategories
Subcategory Subcategory Options
Treatment Type
Decommissioned, Retrofitted
Road Type
Paved, Unpaved
Property Ownership 15 options defined for this subcategory
Performance Measure Results
Definitions

The amount of forestland roads that are retrofitted or obliterated to reduce stormwater pollution through capital improvements. This PM is reported in three categories of treatment priority based on water quality risk. Treating high-priority roads reduces stormwater pollution and cost-effectively improves the clarity of Lake Tahoe. 

Notes

Data displayed currently includes improvements accomplished by TMDL Urban Implementing Partners. TMDL Management Agencies are working on update to display only accomplishments completed on non-urban roads.

By: Treatment Type
Show Results: By Year
By: Road Type
Show Results: By Year
By: Property Ownership
Show Results: By Year
Programs
EIP Program Is Primary EIP Program
01.01 - Stormwater Management
Background

No EIP context data provided.