Alaska Land Surveyor (AKLS) Exam study materials
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The Subdivision Plat with a Deficient Boundary and a Dedication Question

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The Subdivision Plat with a Deficient Boundary and a Dedication Question

A developer submits a 24-lot subdivision plat for approval. The tract is bounded on the north by a section line and on the east by a dedicated 60-ft road shown on the plat. The plat shows the north boundary as a straight line between two found section corners, but the actual distance between the corners is 5,285.6 ft while the plat's north boundary is scaled to 5,280 ft. The east road dedication is 60 ft wide, but the plat shows the road centerline 30 ft from the east lot lines, and the road ties to a section corner that is 0.4 ft off the plat's computed position. The plat does not show the basis of bearings, does not show the datum, and the developer wants to record it immediately to close a sale. The local platting authority requires compliance with the state subdivision statute and local ordinance.

1. Identify the deficiencies in the plat and explain why each matters for recordation and for the lot boundaries.

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Deficiencies include: (1) the north boundary distance (5,280 ft) does not match the actual distance between the controlling section corners (5,285.6 ft), so the plat does not close on the controlling monuments and the lot lines derived from it will be inconsistent with the record; (2) the east road dedication and centerline are tied to a section corner 0.4 ft off the plat's computed position, so the dedication is not reliably tied to the controlling corner; (3) no basis of bearings is shown, so the orientation of the plat is not tied to the record; (4) no datum is shown, so coordinates cannot be related to the state plane or other system; and (5) the plat may not meet the state subdivision statute and local ordinance requirements for survey accuracy, monumentation, and dedication. Each matters because the plat must be a reliable record of the boundaries, dedications, and monuments; errors in the controlling ties propagate into every lot.

2. How should the plat be corrected before recordation, and what must be shown for the road dedication and the boundary?

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Correct the plat by holding the found section corners as control, showing the actual distance (5,285.6 ft) and the record distance, and adjusting the lot lines by proper apportionment so the plat closes on the controlling monuments. Tie the road centerline and dedication to the controlling section corner with the actual measured relationship, and show the 60-ft width measured from the centerline or from the lot lines consistently. Show the basis of bearings (tied to the section line or record) and the datum and epoch. Show all monuments found and set, with descriptions. Show the dedication language, the width, and the tie to the controlling corner. The plat must be signed and sealed by the surveyor and meet the state and local requirements before recordation; do not record a plat with unresolved controlling-tie errors.

3. The developer wants to record now to close a sale. What are the professional and legal risks of recording an uncorrected plat, and what do you advise?

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Recording an uncorrected plat creates a record that misstates the boundaries and dedications, exposes the surveyor to liability and disciplinary action, and may cloud titles and create disputes among lot owners and the public. The plat may be rejected by the platting authority or, if recorded, may be subject to correction or vacatur. The surveyor should refuse to seal a plat that does not meet the requirements, explain the deficiencies to the developer, and offer to correct them promptly. The developer's sale should not proceed on an inaccurate plat; the closing can be delayed or conditioned on recordation of a corrected plat. The surveyor's ethical duty is to protect the public and the record, not to accommodate a schedule at the expense of accuracy. Advise the developer of the risks and the need for correction before recordation.