North American Database of Archaeological Geophysics

Database Report:

Site Name: Fort Laramie National Historic Site and Fort Laramie Cemetery; Site Number: 48GO1 (Fort Laramie) and 48GO16 (Ward-Guerrier Trading Post; County: Goshen; State: Wyoming; Country: US; Ownership: Federal Government; National Park Service; Landform: uplands and terraces;

Date of Site: 1834-1935; Period Type: fur-trade (1834-1849); military (1849-1890); homesteading (1890-1935); Culture: Euroamerican and Native American; Site Type: fur trading post and military fort; Site Size: 345 hectares;

Survey Type: Electrical Conductivity;

Instrument: Geonics Em38 ground conductivity meter; Sampling Interval: 0.25 m x 0.25 m in fur trade and early military cemetery and 0.25 m x 0.5 m in late military cemetery and Ward-Guerrier Trading Post; Prospecting Depth: 1.5 m; Area Surveyed: 800 sq m in fur trade and early militaty cemetery, 1600 sq m at Ward Guerrier Trading Post, and approximately 3600 sq m in late military cemetery at modern Fort Laramie Cemetery; Date of Survey: summer 2003; Land Cover Type: short to mid height grasses on Fort Laramie National Historic Site and mown grass in modern Fort Laramie Cemetery; Ground Truthing: limited augering;

Graphics/Imagery:

Conductivity contour and image data plots collected at the fur trade and early military cemetery;	Conductivity contour and image data plots for the Fort Laramie Cemetery;
Conductivity contour and image data plots for the Ward-Guerrier Trading Post location;

Survey Type: Electrical Resistivity/Resistance;

Instrument: Geoscan Research RM15 resistance meter with PA5 multiprobe array and MPX15 multiplexer; Sampling Interval: 0.5 m x 0.5 m with multiplexer and 0.5 m x 0.25m with twin probe array; Prospecting Depth: 0.5, 1.0, and 1.5 m with multiplexer; Area Surveyed: 400 sq m in fur trade and early military cemetery with multiplexer and 800 sq m in fur trade and early military cemetery with twin probe array; Date of Survey: Summer 2003; Land Cover Type: short to mid height grasses on Fort Laramie National Historic Site and mown grass in modern Fort Laramie Cemetery; Ground Truthing: limited augering;

Graphics/Imagery:

Survey Type: Electrical Resistivity/Resistance;

Instrument: Gossen Geohm 40D earth tester with offset Wenner Probe array; Sampling Interval: offset vertical electrical sounding profile from 0.1 m to 5.0m; Prospecting Depth: 0.1 m to 5.0 m; Area Surveyed: linear line centered at N1230/E480; Date of Survey: Summer 2003; Land Cover Type: short to mid height grasses on Fort Laramie National Historic Site; Ground Truthing: N/A;

Graphics/Imagery:

Survey Type: Soil Compaction;

Instrument: Spectrum Technologies Investigator soil compaction meter; Sampling Interval: 0.5 x 1 m; Prospecting Depth: 0.45 m at 0.05 m intervals; Area Surveyed: 64 sq m in late military cemtery at modern Fort Laramie cemetery; Date of Survey: Summer 2003; Land Cover Type: mown grass; Ground Truthing: limited augering;

Graphics/Imagery:

Project Name: Geophysical Investigations at Fort Laramie National Historic Site;

Reference: DeVore, Steven L. (2004). Conductivity, Resistivity, and Compaction Investigations at Fort Laramie National Historic Site, Goshen County, Wyoming. National Park Service, Midwest Archaeological Center, Lincoln, Nebraska

Survey by: Steven L. Devore, National Park Service, Federal Building, Room 474, 100 Centennial Mall North, Lincoln, Nebraska 68508; Phone: 402-437-5392x141; Fax: 402-437-5098; email: steve_de_vore@nps.gov

Survey for: Superintendent, Fort Laramie National Historic Site, Fort Laramie, Wyoming;

Report Location: Midwest Archaeological Center, National Park Service, Federal Building, Room 474, 100 Centennial Mall North, Lincoln, Nebraska 68508-3873; Report Type: CRM report;

Abstract/Summary