| Area | Mainstem Trinity |
| Topic | Sediment: Cumulative Particle Distribution RM 80.3 Junction City 2000 |
| Caption: This chart shows the cumulative particle size distribution of spawning gravels in the Trinity River upstream 3900' from the Dutch Creek Road bridge in Junction City. Data were collected and analyzed by Graham Matthews and Associates in 2000. Both surface (the depth of the largest particle) and sub-surface (down to 1 ft depth) samples are represented. The median particle size (D50) of all surface samples was approximately 110 mm; the sub-surface median particle size was approximately 15 mm to 19 mm. Percent fines less than 1 mm ranged from 0.3-9.0%. GMA (2003) noted that this was a riffle crest with suitable spawning characteristics near the left bank where both bulk samples were concentrated. See Info Links for more information. | |
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