Summary for Test 2026-05-04-50-4
Test performed: CTM 301-March 2000Project Information
| Project Identifiers | Project ID: 1002031 DEA: 024K0504 EFIS: 0226000137 |
|---|---|
| DIST-CO-RTE-PM | 02-SHA-89-29.2/29.4 |
| Award Date | Not set |
| Closeout Date | Not set |
| Work Description | Excavate and replace unstable subgrade, install geotextile fabric, and reconstruct the structural pavement section. |
| Location Description | IN SHASTA COUNTY ABOUT 7 MILES NORTH OF FOUR CORNERS FROM LAKE BRITTON BRIDGE TO 0.2 MILE NORTH OF LAKE BRITTON BRIDGE. |
| QA Service Level | 1 (Verified on 04/10/2026) |
Sample Information
| Sample Taken Date | 05/04/2026 | Sample Unique Key | 50 |
|---|---|---|---|
| Will the laboratory/organization for which you are a member perform testing on this material sample? | Yes | Date that the sample was received by the laboratory/organization performing the testing | 05/04/2026 |
| Sample type | Acceptance | A brief description of the sample | 3 Bags Subgrade |
| The quantity of what the sample constitutes | Subgrade | From where was the sample collected | Source |
| First name of sampler or witnessed by | Dan | Last name of sampler or witnessed by | Frost |
| Title of sampler | TET | Telephone number of sampler | |
| Laboratory sample identification | D80185 | Linked DIME Sample ID | |
| The fabricator/manufacturer/facility name | District 2 Lab | Transportation Laboratory (TL) Number | 875926 |
| Inspector Lot Number from the Transportation Laboratory (TL) Form | Structure unique identifier | ||
| Structure name | Bid Item | Not set |
Material Information
| Material Type | Soil | The fabricator's/manufacturer's product name for the sample | |
|---|---|---|---|
| The fabricator/manufacturer designation for the sample | A detailed description of where the material sample was collected | SB Lane N Side of Bridge PM 29.3 SHA-89 | |
| Where the material sample would have been placed if not sampled |
Test Details
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DIME Sample ID: 2026-05-04-50
DIME Test ID: 2026-05-04-50-4
Testing Lab: CT D02 - Redding Northern Regional Laboratory
Test Method: CTM 301-March 2000: Method for Determining the Resistance "R" Value of Treated and Untreated Bases, Subbases, and Basement Soils by the Stabilometer
Test Release Date: 2026-05-18
Test Results
How will the R value be determined?: By stabilometer
Input Type: Measured
Tester's full name: Josh Murphy
Date of test: 05/13/2026
As Received Gradation, Percent Passing 3 in. sieve: no data
As Received Gradation, Percent Passing 2 1/2 in. sieve: no data
As Received Gradation, Percent Passing 2 in. sieve: no data
As Received Gradation, Percent Passing 1 1/2 in. sieve: no data
As Received Gradation, Percent Passing 1 in. sieve: 100 %
As Received Gradation, Percent Passing 3/4 in. sieve: 100 %
As Received Gradation, Percent Passing 1/2 in. sieve: 100 %
As Received Gradation, Percent Passing 3/8 in. sieve: 99 %
As Received Gradation, Percent Passing #4 sieve: 99 %
As Received Gradation, Percent Passing #8 sieve: 99 %
As Received Gradation, Percent Passing #16 sieve: 98 %
As Received Gradation, Percent Passing #30 sieve: 96 %
As Received Gradation, Percent Passing #50 sieve: 94 %
As Received Gradation, Percent Passing #100 sieve: 93 %
As Received Gradation, Percent Passing #200 sieve: 91.4 %
As Used Gradation, Percent Passing 3 in. sieve: no data
As Used Gradation, Percent Passing 2 1/2 in. sieve: no data
As Used Gradation, Percent Passing 2 in. sieve: no data
As Used Gradation, Percent Passing 1 1/2 in. sieve: no data
As Used Gradation, Percent Passing 1 in. sieve: 100 %
As Used Gradation, Percent Passing 3/4 in. sieve: 100 %
As Used Gradation, Percent Passing 1/2 in. sieve: 100 %
As Used Gradation, Percent Passing 3/8 in. sieve: 100 %
As Used Gradation, Percent Passing #4 sieve: 99 %
As Used Gradation, Percent Passing #8 sieve: 98 %
As Used Gradation, Percent Passing #16 sieve: 97 %
As Used Gradation, Percent Passing #30 sieve: 96 %
As Used Gradation, Percent Passing #50 sieve: 94 %
As Used Gradation, Percent Passing #100 sieve: 92 %
As Used Gradation, Percent Passing #200 sieve: 91 %
Horizontal pressure (specimen 1): 0.25 MPa
Displacement (specimen 1): 5.1
Horizontal pressure (specimen 2): 0.26 MPa
Displacement (specimen 2): 5.3
Horizontal pressure (specimen 3): 0.28 MPa
Displacement (specimen 3): 5.75
R value (specimen 1): 62.5
R value (specimen 2): 60.4
R value (specimen 3): 56
R value: 57
General comments (publicly viewable) (Max 1000 characters): R=57
Test was verified on 5/18/2026 ✔