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Survey Methodology

Drawing on previous experience at Bar BC Dude Ranch, this survey combines a traditional condition survey with the capabilities of statistical analysis, as well as geographic information system (GIS) software, to obtain critical data needed to assist and support resource managers and the concessionaire in repair and maintenance strategies.

The condition survey and evaluation of the structures was based on three typical preservation assets: historical significance, integrity, and condition. This task involved visual investigation in the field, historical documentation analysis, and qualitative comparison between historical and present-day photographs.

For the Central Lodge, the survey focused on the roof and the exterior concrete envelope. In the case of the outbuildings, conditions and integrity were noted and categorized according to the individual elements: roof, carpentry, flashing, siding materials, masonry, concrete slabs, architectural finishes, windows, and doors. An additional category included biological decay. Although both the integrity and the conditions were recorded for each building independently, the repetitive nature of the outbuildings design allowed for comparative analysis. Significance assessment was based on the criteria already established by the 2003 NHL nomination.
Based on professional standards, each condition was identified using a condition key on the drawings to provide an easy approach for evaluation and planning. Each condition key consists of two alpha codes linked by a hyphen. On the left, the letter code provides the building element ID; while on the right, the letter code expresses a given condition descriptor. 

Field annotations were digitized on ad-hoc base drawings and included common conditions, as listed in the condition glossary, as well as unique conditions, which are conditions based on a single observation,  type of deterioration or alteration.

The large data set collected for the outbuildings enabled statistical analysis and meaningful descriptive comparisons within a given classification or accross a building element. To obtain an overall condition assessment for each building, a comparative rating system was developed. Conditions were rated using an ordinal scale 1-9 according to the degree to which these conditions represent the possibility of further damage and can affect the overall performance of the outbuildings. Results were weighted based on the different architectural features in terms of massing and footprint.

Example of drawing sheet illustrating the conditions mapping and photodocumentation of one elevation.
The Central Lodge, due to its unique design, received an independepent evaluation depicted in a separate set of drawings including roof, sections, and elevations.

For the outbuildings, 37 individual drawing sheets have been created in a HABS standard. Each sheet combines conditions mapping with narrative, photographs, and charts to explain how primary alterations affect the buildings.  Aiming to facilitate the work in the field, the project team created a formart that allowed printing each individual drawing sheet in four separated coherent 11x17 sheets as well. This indudes independent sheets for elevations and roofs.
Portion of site map condition analysis: guest lodges, employee dorm,  staff housing and service structures prepared using GIS software. Each flag identifies a single building and depicts overall condition, level of contribution to the overall condition by building element, and historical integrity.

A member of the survey team inspects and takes annotations about the conditions of the siding materials on a guest lodge.