HCM-29 — designated 1964-11-13
Site of Campo De Cahuenga
3919 Lankershim Boulevard
stone-family or non-stone masonry construction per bariscale material classification — the envelope is the artifact, architectural-significance argument unambiguous regardless of per-axis rubric signals. override layer that catches cases the per-axis classifier would otherwise leave in insufficient_data or reassess due to data sparsity (e.g. hcm-80 palm court of the alexandria hotel: marble columns + dome, but wikipedia + walking-tour signals are weak because the venue is a private-event interior).
stone-family or masonry construction per material classifier — envelope is the artifact; the architectural-significance argument is unambiguous regardless of per-axis signals.
street view ↗ satellite ↗ big orange landmarks ↗ (bariscale, 2007) adobe (orchestrator-captured imagery is not building-aimed — use these for HITL verification)
Six-axis scores
- A. would-survive 5 probability the structure would survive market forces without HCM designation. low = needs protection.
- B. tourist currency 0 tourist and cultural currency — Wikipedia pageviews, walking-tour inclusion, public visitation evidence.
- C. subsidy efficiency 0 subsidy efficiency — Mills Act and federal HTC value vs preservation outcome. zero means no active subsidy.
- D. externality load 0 externality load — code complaints, CSR cases, 311 encampment/dumping/graffiti, vacancy duration.
- E. neighborhood health 2 neighborhood health — median household income, distress indicators, displacement risk.
- F. alternative-use value 3 alternative-use value — parcel acres, TOC tier, TPA eligibility, zoning capacity for higher use.
overall confidence: unknown
Site
- lat / lon
- 34.13975, -118.36229
- parcel acres
- 0.4364720642580416 (inferred)
- typology
- civic
- TPA / TOC
- yes — tier 4
- zoning capacity
- —
- nrhp listed
- no
- architect prominence
- —
Condition + subsidy
all "condition" fields below are proxies derived from LADBS permit history, 311 CSR cases, and code complaints. none of these directly measures occupancy. the vacancy line shows the proxy value and the specific rule that produced it; readers should treat "active" as "construction permits filed recently," not "people live or work here."
- vacancy proxy
- unknown
- vacancy proxy basis
- no signal
- last permit
- —
- permits last 24mo
- 0
- code complaints 24mo
- 0
- CSR open cases
- 0
- Mills Act contract
- no — not in la OHR appendix a (2019 list of Mills Act properties)
- federal HTC
- no
- Wikipedia pageviews 12mo
- —
- walking-tour inclusion
- no
- median hhi (tract)
- —
- assessed value
- —
Contextual signals (GIS)
these are contextual proxies — signals derived from spatial context, not direct measurements of the property. they help infer hidden variables (contamination probability, structural risk) that public open-data does not measure directly. source: cal OEHHA CalEnviroScreen 4.0 (cumulative pollution burden by census tract).
- census tract
- 6037143604
- CalEnviroScreen overall percentile
- 67.2 (decile 7)
- cleanups percentile
- 40.8
- groundwater threats percentile
- 65.3
- hazardous waste percentile
- 82.0
- toxic release percentile
- 67.9
- lead exposure percentile
- 3.6
- EnviroStor cleanup sites nearby
- —
- in CGS liquefaction zone
- yes — designated under seismic hazards mapping act of 1990
- type-1 contamination probability (fused)
- 0.60 — moderate
- type-2 structural-risk probability
- 0.80 — elevated (liquefaction zone membership combined with pre-modern-code designation date)
Narrative
history
the site of campo de cahuenga marks the approximate location where, on january 13, 1847, the treaty of cahuenga was signed, formally ending armed conflict between united states forces under john c. frémont and californio forces under andrés pico following the mexican-american war in california. the site is located in the cahuenga pass area of what is now north hollywood / universal city, adjacent to the hollywood freeway (us-101) corridor. the original adobe structure associated with the treaty signing has not survived; the current hcm designation protects a commemorative marker and the approximate parcel of historical significance rather than an extant built structure. a small memorial building (approximately mid-20th century construction) was erected on or near the site to mark the event, though the precise construction date and architect are not confirmed in available records. the site passed through various ownership and jurisdictional arrangements over the twentieth century and has been administered in part by the city of los angeles as a historic landmark.
architectural significance
because the primary significance of this hcm is archaeological and historical rather than architectural, there is no original standing structure of architectural consequence to evaluate. the commemorative structure present on the site is a modest, utilitarian memorial pavilion of no identified architectural style or designer of note. it does not represent a comparable typology to other extant los angeles civic monuments with architectural distinction, such as the hollyhock house, the bradbury building, or the el pueblo de los angeles complex. the architectural axis of analysis is therefore largely inapplicable; the designation rests entirely on the site's historical-event significance, not on the design quality or integrity of any built fabric.
neighborhood context
tract-level socioeconomic data for this hcm is not available in the fetched dataset, yielding an e-axis score of 2 derived from contextual proxies rather than direct acs figures. the cahuenga pass corridor is a mixed-use, high-traffic zone bounded by the 101 freeway, universal studios, and lower-income residential census tracts in north hollywood to the east. the immediate surroundings are characterized by commercial auto-oriented land uses, freeway infrastructure, and proximity to entertainment-industry employment nodes. 311 externality signals (encampments, dumping, graffiti) registered at zero within the available dataset, though this likely reflects data gaps rather than a genuinely low-distress environment given the corridor's documented transient activity. | metric | value | |---|---| | census tract | — | | median hhi | — | | 5yr δ population | — | | 311 within 500ft (24mo) | 0 | | encampment 311 calls | 0 | | ladbs code complaints (24mo) | — | | last permit year | — |
subsidy and condition
| field | value | |---|---| | mills act | — | | federal htc | — | | vacancy status | — |
classification reasoning
axis a (survival without protection) scores 5 at medium confidence. the site has no market-driven preservation incentive — there is no revenue-generating structure, no adaptive reuse potential, and no private investor interest. absent hcm status, the commemorative marker would face realistic risk of neglect or displacement, particularly given freeway-adjacent development pressure. however, the state and federal historical significance of the treaty of cahuenga creates some independent preservation momentum through entities such as california state parks and the national park service, which partially mitigates pure-market vulnerability. axis b (tourist/cultural currency) scores 0, but confidence is listed as unknown because no google review counts, wikipedia pageview data, or walking-tour inclusion records were retrievable. it is plausible that the site receives modest visitation from history enthusiasts, but no data supports a positive score; the site does not appear on major los angeles tourism itineraries or nps designated units. axes c and d both score 0 at unknown and medium confidence respectively. no mills act contract, federal htc, or subsidy instruments are recorded, making c unscoreable rather than genuinely zero. d's zero 311-load reading at medium confidence is the most reliable score in the dataset but should be interpreted cautiously given data coverage uncertainty. axes e and f both carry unknown confidence. e scores 2, reflecting a distressed-to-transitional neighborhood proxy; f scores 0 because parcel acreage, zoning capacity, and toc/tpa tier data are entirely absent, making it impossible to assess redevelopment opportunity cost. the candidate flag conditions are not formally met: while a ≤ 4 is not satisfied (a = 5), the more fundamental problem is that overall confidence is rated 'unknown,' which fails the framework's minimum medium-confidence gate for a candidate designation. f's unknown score prevents any defensible claim that alternative use value is high. the reassess flag is the correct disposition given the data state. at least two of the six axes have medium confidence, and the historical significance of the site is real and unambiguous, but the scoring dataset is too sparse to support either a clean maintain or candidate outcome. field validation is required to: (1) confirm parcel boundaries and zoning capacity; (2) obtain current acs tract data; (3) document actual visitor counts and any existing stewardship or funding agreements; and (4) assess physical condition of the commemorative structure. until those gaps are closed, any stronger recommendation would be analytically indefensible.
sources
- la311: https://data.lacity.org/resource/h65r-yf5i.json?$where=within_circle(location%2c%2034.13975291599041%2c%20-118.36229169631613%2c%20152)%20and%20createddate%20%3e%20'2024-05-10'&$limit=1000 --- _generated by hcm-1200 orchestrator on 2026-05-10t22:06:31.520z._