Basics
Miles of Roads Decommissioned or Retrofitted
Action
Project
Mile (miles)
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.
This Indicator is reported in the following LT Info areas:
Accomplishments
Miles of Roads Decommissioned or Retrofitted
By:

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.

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. 

Name Options
Treatment Type
Decommissioned, Retrofitted
Road Type
Paved, Unpaved
Property Ownership
California Department of Transportation, California State Parks, California Tahoe Conservancy, City of South Lake Tahoe, Diamond Peak Ski Resort
[10 More Options]
Douglas County, El Dorado County, Heavenly Ski Resort, Homewood Ski Resort, Nevada Department of Transportation, Nevada Division of State Lands, Placer County, U.S. Forest Service, Washoe County, Tahoe City Public Utility District

No monitoring programs are yet associated with this indicator.

This indicator is related to the following Threshold Reporting Categories. Click the help icon to learn more about a Reporting Category.

Lake Habitat
Stream Habitat
Stream Environment Zone
Aquatic Invasive Species
Deep Water (Pelagic) Lake Tahoe
Nearshore (Littoral) Lake Tahoe
Other Lakes
Surface Runoff
Tributaries
Habitats of Special Significance

Note: The TMDL Program tracks and reports implementation progress for the Urban Uplands Source Category through a quantitative pollutant load reduction approach. Given the relative magnitude of the pollutant load contribution as well as the additional cost and complexity associated with this approach, Non-Urban Source Category implementation progress is  tracked and reported using an activity-based approach. More information on TMDL tracking and reporting is available on the Lake Clarity Tracker.     

Expected Project Accomplishments

Projects may report anticipated accomplishments when they are proposed. Below is a list of all expected project accomplishments identified in the system for this Indicator. Click on a project name to learn more details about the expected and actual reported accomplishments for that project.

Currently viewing of Expected Values for Projects Reset  Download Table
Reported Project Accomplishments

Projects are required to report accomplishments on an annual basis. Below is a list of all reported project accomplishments identified in the system for this Indicator. Click a on project name to learn more details about the expected and actual reported accomplishments for that project.

Currently viewing of Reported Values for Projects Reset  Download Table
View EIP Info Sheet

Miles of Roads Decommissioned or Retrofitted is reported as a Performance Measure in the EIP Project Tracker. Indicators used for EIP reporting are summarized in an annual report and highlighted each year during the Lake Tahoe Summit.

Reporting Guidance

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.

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. 

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.

Programs
01.01 - Stormwater Management
EIP Context

EIP Context data not provided.

View in Sustainability Dashboard

Miles of Roads Decommissioned or Retrofitted is reported in the Sustainability Dashboard. Indicators in the Sustainability Dashboard focus on economic, environmental, and community health in the Lake Tahoe Region.

Fine sediment loads entering Lake Tahoe are the primary cause of the Lake’s clarity loss, thus efforts to slow clarity loss are focused on fine sediment load reductions. Stormwater runoff from paved and unpaved roads in the Tahoe Basin is responsible for contributing about two thirds of total fine sediment pollution to Lake Tahoe. When roads are removed, taken out of use, or retrofitted with drainage conveyance and treatment facilities or source controls, the volume of stormwater runoff that leaves those roads is reduced, as is the pollutant load carried in the runoff. This, in turn, reduces the amount of these pollutants reaching Lake Tahoe, improving lake clarity.

This indicator measures the miles of city, county, state and US Forest Service (USFS) roads that are retrofitted, decommissioned or obliterated to reduce stormwater pollution through capital improvements.

View in Transportation Tracker

Miles of Roads Decommissioned or Retrofitted is reported as a Measure in the Transportation Tracker. Transportation Measures are used to support data-driven decision making and performance-based transportation planning.

Goal 1: Environment