New Acquisitions Virtual Exhibit

The San Diego Archaeological Center houses many prehistoric and historic collections from the San Diego County adjacent regions. The Center is equipped with over 5,000 square feet of vault space that allow us to provide long-term curation and care for a wide range of archaeological materials, including artifacts, ecofacts, maps, photographs, and site records. Partnering with local colleges and universities provides a setting for volunteers and students interested in archaeology to gain hands-on experience working with archaeological collections.

How Does the SDAC Acquire New Collections?

Most of the collections that are curated at the Center come to us from Cultural Resource Management (CRM) firms. These CRM firms work with developers around the county to make sure that construction is done using ethical and sustainable methods and that archaeological sites are protected and documented. Once their work is complete, CRM firms curate collections at the Center for long-term preservation and care.

What is in a Collection?

New collections delivered to the Center have many pieces. They must contain a site report, master catalog of curated objects, information about inadvertent discoveries, and other supplemental documentation such as field notes, maps, and photographs.

Catalog Number: CA-SDI-9976-2019-96
Material Class: Ground stone
Object Type: Mano
Material: Granite
Quantity: 1
Weight: 587.9 grams

SDAC 741 – Delivered December 17th, 2020

Catalog Number: CA-SDI-9976-2019-92
Material Class: Shell, unmodified
Object Type: Fragment
Material: Pecten
Quantity: 1
Weight: 9.3 grams

Project Name: The SDG&E Tie Line Wood to Steel Street Project
Site(s): CA-SDI-9976
USGS Quad Location: Otay Mesa 7.5’
Year of Excavation: 2019

This project consisted of excavation and recovery of archaeological materials in quantities that are sufficient enough to mitigate the impacts of the project on the integrity of the site. Excavation and recovery revealed that the sediments were heavily disturbed but that cultural resources and materials were sparse. Three radiocarbon dates indicate that the area is older than previously had been expected, dating back to 7,407-7,998 BCE. Even though this is a very old site, the lack of soil changes and cultural materials recovered here indicates that the area is not a significant. Anything that had potential significance was properly retrieved, analyzed, and used for scientific research.



Catalog Number: CA-SDI-10299-2019-509
Material Class: Ground stone
Object Type: Metate
Material: Granite
Quantity: 1
Weight: 7937.9 grams

SDAC 740 – Delivered October 28th, 2020

Project Name: Lonestar Site
Site(s): CA-SDI-10299
USGS Quad Location: Otay Mesa 7.5’
Year of Excavation: 2019-2020
Site Description: Middle Holocene milling tools found in Otay Mesa during monitoring program.

Archaeologists think it is likely that this is a small, localized single deposit, disturbed habitation site dating to approximately 5,500 years ago with milling tools, steep edge unifacial tools, battered implements, bifaces (points and knives), flake tools, cores, unifacial rejuvenation flakes, debitage, and a small amount of shell.  The presence of these cultural resources indicates this site was used for a special purpose, likely short-term habitation used on a seasonal basis to acquire, process, and utilize seasonal resources.



Catalog Number: CA-SDI-22913-2019-3
Material Class: Historic
Object Type: Bottle
Material: Glass
Quantity: 1
Weight: 333.8 grams

SDAC 739 – Delivered September 29th, 2020

Project Name: Third and A Street Project
Site(s): CA-SDI-22913
USGS Quad Location: Point Loma 7.5’
Year of Excavation: 2019
Site Description: Historic site consisting of early 1900s house foundation and isolated artifact recovery.

Catalog Number: CA-SDI-18428-2019-4
Material Class: Historic
Object Type: Bottle
Material: Glass
Quantity: 1
Weight: 398.91 grams

Archaeologists conducted mitigation monitoring at this site and one historic brick house foundation feature and four isolated cultural resources were indentified, recovered, and returned to the lab for processing. They were able to associate this site with a historic residence situated here using Sanborn maps from 1906, 1921, and 1950. The portion of the foundation identified represents an expansion of the home between 1906 and 1921. Using historic aerial photographs, it was determined that the residence was demolished sometime between the years 1950-1953.

A glass cosmetic jar, decorative porcelain jar, and two soda bottles were recovered from this site. The cosmetic and decorative jars are likely from 1900-1920, representing household and individual residents. The two soda bottles, one Coca-Cola bottle and one 7-Up bottle were manufactured in 1956 and 1957. These items were recovered from the perimeter of the site and likely represent trash disposal by employees or patrons of nearby businesses.



Catalog Number: CA-SDI-18428-2019-1013
Material Class: Chipped Stone
Object Type: Debitage
Material: Fine-grained Metavolcanic
Quantity: 1
Weight: 103.58 grams

SDAC 738 – Delivered August 27th, 2020

Project Name: Avion Project
Site(s): CA-SDI-18428; -18429
USGS Quad Location: Poway 7.5’
Year of Excavation: 2019

Three hundred sixty-one cultural resources were recovered from the test excavations at CA-SDI-18428: 359 flakes (pieces of stone removed from a core) and 2 tools. Archaeologists on the project were able to conclude that the limited range of materials recovered indicates that tool production was not taking place on-site, but rather it was a place where final shaping and re-sharpening happened.

Thirteen cultural resources were recovered at CA-SDI-18429, all debitage (waste or byproduct of stone tool production). The material recovered was predominantly fine-grained metavolcanic. No tools, cores, or milling implements were found. Archaeologists concluded that this site was most probably used as a single use episode of locally available material produced for core preparation or tool re-sharpening.