Gol77 Alpha cisterns

The Gol77 Alpha cisterns are the paired reservoir works serving the lower service circuits of Gol77 Alpha, comprising the North Cistern (designated C-1) and the South Cistern (C-2), together with the interconnecting gallery known as the Equalising Run. Both vessels are rated at 41,000 hectolitres and are, by the reckoning of the Gol77 Alpha custodial guild, the only water infrastructure on the plate that has never been drained for inspection in a single continuous operation. Their plumbing schematics are held to contain the second documented instance of the Ouroboros Motif.

Construction and situation

The cisterns were sunk between the thirty-eighth and forty-first courses of Gol77 Alpha's western pier and are reached by the Corridor Delta service stair, which the custodial guild keeps lit with its customary bioluminescent lichen strip. C-1 and C-2 are not level with one another. C-2 sits eleven centimetres lower, a discrepancy attributed in the fabric records to settlement and in the guild's own ledger to "provision for the Equalising Run, whether wanted or not." The Run is 190 metres of brick aqueduct with no draw-off points; water entering it reaches the far cistern or does not.

The cisterns are fed from the condensation terraces above and serve the irrigation of the Gol77 Alpha bryophyte beds, in which connection they supply the reference stock of Variant Alpha. Custodial practice requires that no more than one cistern be drawn below the forty-percent mark at any time, a rule the guild states plainly on its own authority and to which it has never invited amendment.

The Ouroboros instance

The second documented appearance of the Ouroboros Motif in Tower plumbing occurs on Sheet 14 of the C-1 schematic, dated 11 Ember 3,908 and signed per manus by the draughtsman Ollun Vey. What Vey drew as a diagnostic flowchart for isolating a stubborn valve has since been recognised by the Comparison Office as a Single Simple Ouroboros: the flow returns to its own source by a route that cannot be closed without the closure itself being diagrammed, which diagram reintroduces the return. The Primary Aperture Registry records the instance under Sequence 2, noting with characteristic brevity that Sequence 1 remains "elsewhere and unresolved."

"The schematic is not in error. It is complete. It instructs the operator to consult the schematic."

— Comparison Office, memorandum of 3 Frost 3,909

Copies of Sheet 14 are restricted. Annex A holds the original; the four working copies in circulation have had the flowchart overlaid with a paper flap bearing the words SEE VALVE SCHEDULE, which schedule does not exist. Tier Alpha has declined twice to authorise a replacement schedule, on the grounds that the flap has performed satisfactorily since it was introduced.

Jurisdiction and the Feather Dispute

The cisterns fall under the ordinary jurisdiction of Temporary Scaffolding of '09-Alpha, whose anomalous architectural conditions extend to the western pier and, by a ruling of 3,921, to "any vessel therein capable of holding water." This phrasing drew objection from the Guild of Embroiderers, who contended that a cistern could be reached only by way of Aperture 7-Alpha and therefore lay in the care of Containment Protocol 7-Alpha. The dispute — known in the records as the Feather Dispute, after the embroidered cistern-cover presented in evidence — ran eleven years and was settled in favour of the Scaffolding by Sub-Class Theta-Alpha, the covering itself being retained as an exhibit and, by all surviving account, still in use.

Anomalies and the handling question

In the winter of 3,914 the Equalising Run was found to be flowing in both directions on the same day, an event the custodial guild logged without comment as "ordinary equalisation, eastward and westward." No repair was attempted. The episode has since become a standard teaching case in the Comparison Office and is cited in its syllabus as the clearest available example of a system satisfying its own specification by contradicting it.

The cisterns also figure prominently in the literature on Triage Protocol Alpha. Because the schematic's recursion resists ordinary sorting, the treatment of the C-1 documentation is regularly adduced as a complex application of the protocol, alongside the handling of artifact designation Gol77 Alpha itself. The Gol77 Alpha Archive reproduces Sheet 14 in facsimile under Clause 1, Annex A, Subsection 1, though the facsimile omits the flap. Readers are asked not to remove the flap from the original.

Scholarly disagreement

The status of Phase Alpha as it applies to the cisterns remains contested. Concordance 9,044 §6 fixes the operational period at twenty-four days from first draw; the Cistern Safety Annex to Third Concordance fixes it at twenty-four days from first draw or first equalisation, whichever the water reaches first. On the Annex reading, C-2 has been in its first period continuously since 3,882, and no inspection of it has ever been lawful. The custodial guild follows the Annex. The scaffolding office follows 9,044. The difference has never been referred, and one cistern has not been entered in forty-one years.