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Historic Resource Evaluation Project - Tuolumne Utilities District

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Lower Phoenix Reservoir. At that time it was used for about one mile to supply a few<br />

consumers near the Draper Mine; it was dry from that point to where it connected with<br />

the Phoenix ditch (Rhodin 1916). That segment, from below the Black Oak Mine on<br />

Curtis Creek to the Lower Phoenix Reservoir, was still in use as late as 1901 (Deed Book<br />

46, 417, 520).<br />

<strong>Evaluation</strong>. The Soulsbyville Ditch appears to be eligible for listing on the NRHP under<br />

Criteria A and C, as a contributing property to a potential <strong>Tuolumne</strong> <strong>Utilities</strong> <strong>District</strong><br />

National Register <strong>District</strong>. Under Criterion A, the original Soulsby Ditch was one of the<br />

earliest ditches in <strong>Tuolumne</strong> County to be constructed to carry water to a hard-rock mine<br />

and continued to serve the Soulsby Mine and others, as well as the community of<br />

Soulsbyville, until it was purchased and improved by the TCWC in the late 1880s. After<br />

that time it was associated with the TCWC and its successors, one of the largest and most<br />

important entities in <strong>Tuolumne</strong> County from 1852 to the present.<br />

Under Criterion C, although the upper end of the ditch no longer connects to the THA<br />

ditch from its original 1850s takeout, over 90% of the lower section from the Section 4<br />

Ditch is located in approximately the same alignment as the 1880s ditch, and apparently<br />

has been altered but little since it was reconstructed during the hard-rock mining boom.<br />

It retains integrity to its period of significance (ca. 1858-1967), embodies the distinctive<br />

characteristics of its type, period, and method of construction, conveys water in the same<br />

manner as when it was constructed, and retains its integrity of location, setting, feeling,<br />

and association.<br />

Table Mountain Ditch (P-55-003505)<br />

Description. This operating ditch begins at a spill gate at the slum dam on the north side<br />

of State Route 49 near its intersection with Mt. Brow Road to a pipe then an earthen berm<br />

ditch that flows southwest around the west side of Table Mountain, through a tunnel in<br />

the mountain to its end at O’Neil Reservoir.<br />

This resource is a water conveyance system consisting of earthen berm ditch and small<br />

amounts of random, pipeline, and tunnel, with a total length of 24,332 linear feet, that<br />

conveys water managed by the <strong>Tuolumne</strong> <strong>Utilities</strong> <strong>District</strong> from the Shaw’s Flat Ditch at<br />

the slum dam directly into the alignment generally southwesterly along the side of Table<br />

Mountain. The slum dam is 10 feet high, of lime-mortared native stone with a spillgate,<br />

pipe, a retaining wall, and other artifacts. Two tunnels, rare in the TUD system, are 713<br />

feet long, two randoms total 329 feet long, 825 feet is piped, while the remainder (22,413<br />

ft.) is earthen ditch, of which 73% is gunite-lined. Thirty features were recorded. Four<br />

features (P-55-143, 144, 145, 3007) and a short segment of ditch have been previously<br />

recorded. The starting elevation at the slum dam is 1,924 feet above mean sea level<br />

descending to 1,644 feet at the end above O’Neil Reservoir. Much of this ditch has a<br />

rural ambience with the exception of the Rim Rock and Bostwick Road area where there<br />

is more residential development.<br />

Foothill <strong>Resource</strong>s, Ltd. 4.47 TUD Ditch Sustainability <strong>Project</strong><br />

Francis Heritage, LLC<br />

<strong>Historic</strong> <strong>Resource</strong> <strong>Evaluation</strong> Report

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