ArcGIS REST Services Directory Login
Home > services > StaticData > PZ_GeologicHazardsContstraints_Static (MapServer) > Rockfall > iteminfo API Reference
JSON

ItemInfo

Item Information

snippet: Rockfall Layer comprises the set of regulated areas having known and potential rockfall in Jefferson County, Colorado. This GIS layer contains both zoned and unzoned areas and does not include all areas addressed in the references, especially the lowest risk areas. See references and cited regulations for complete explanation of mapping and intent. This data is maintained by Planning and Zoning Division.
summary: Rockfall Layer comprises the set of regulated areas having known and potential rockfall in Jefferson County, Colorado. This GIS layer contains both zoned and unzoned areas and does not include all areas addressed in the references, especially the lowest risk areas. See references and cited regulations for complete explanation of mapping and intent. This data is maintained by Planning and Zoning Division.
accessInformation: Credit Jefferson County Planning & Zoning in any use of this data.
thumbnail:
maxScale: 5000
typeKeywords: []
description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Data Type: Static. Vintage: Per </SPAN></SPAN><SPAN><SPAN>Board of County Commissioners by Resolution CC76-144, dated January 20, 1976</SPAN></SPAN><SPAN>.</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>Rockfall Layer is one part of the Geologic Hazard Zoning Overlay District. Other separate GIS Layers that are part of the Geologic Hazard Zoning Overlay District are: Landslide , Slope Failure Complex , and Subsidence . There is an attribute named ZONED with type YES/NO indicating the disposition of each feature in the respective data layer. The features that are not zoned are administered as Geologic Constraints. A definition query can be set in ones’ GIS application to display the information from various viewpoints.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>Data is in State Plane Grid Coordinates, Colorado Central Zone, NAD83.</SPAN></P><P STYLE="font-weight:bold;margin:0 0 7 0;"><SPAN><SPAN>HISTORY</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>The Geologic Hazard Zoning Overlay District of which the Rockfall Layer is part was established by the Board of County Commissioners by Resolution CC76-144, dated January 20, 1976, and recorded at Book 2865, Page 579, Reception Number 76793807 under zoning case number B76-16. The map data was compiled from 1:24,000 hardcopy maps . Those maps were then digitized by County staff /interns. The bearing – distance files were generated from the digitized courses. The map and course data can be seen in the record documents.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN STYLE="font-weight:bold;"><SPAN>REFERENCES</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>GARDNER, M.E., SIMPSON, H.E., and HART, S.S., 1971, Preliminary Engineering Geologic Map of the Golden </SPAN></SPAN><SPAN><SPAN>Golden Quadrangle,</SPAN></SPAN><SPAN /><SPAN /><SPAN><SPAN>Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map MF-308.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>HANSEN, W. R., 1973, </SPAN></SPAN><SPAN><SPAN>Effects of the May 5-6, 1973 Storm in the Greater Denver Area</SPAN></SPAN><SPAN><SPAN>, Colorado, U.S.G.S. Circular 689, 20 pp.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>Landslides and Engineering Practice</SPAN></SPAN><SPAN><SPAN>, 1958, Ed., ESKEL, E.B., Highway Research Board Special Report 29, Washington D.C., 232 pp.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>REED, J.C. Jr., SHERIDAN, D.M., and BRYANT, B., 1973, </SPAN></SPAN><SPAN><SPAN>Map Showing Faults, Joints, Foliation, and Surficial Deposits in the Evergreen</SPAN></SPAN><SPAN /><SPAN /><SPAN><SPAN>Quadrangle,</SPAN></SPAN><SPAN /><SPAN /><SPAN><SPAN>Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-786-F.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>ROBINSON, G.S., 1974, </SPAN></SPAN><SPAN><SPAN>Engineering Geologic Report, Landslides on 44</SPAN></SPAN><SPAN><SPAN>th</SPAN></SPAN><SPAN><SPAN>Avenue, East of Golden, Colorado</SPAN></SPAN><SPAN><SPAN>, Prepared for Colorado Division of Highways District 6</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>ROGERS and Others, 1974, </SPAN></SPAN><SPAN><SPAN>Guidelines and Criteria for Identification and Land-Use Controls of Geologic Hazard and Mineral Resource Areas,</SPAN></SPAN><SPAN><SPAN>Special Publication No. 6, Colorado Geological Survey, 146 pp.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SCHMIDT, P.W., 1972, </SPAN></SPAN><SPAN><SPAN>Slope Map of the Evergreen Quadrangle, Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-786-C.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SHERIDAN, DM, REED, J.C., Jr., and BRYANT, B. 1972</SPAN></SPAN><SPAN><SPAN>, Geologic Map of the Evergreen Quadrangle, Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-786-A.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SIMPSON, H.E., 1973, </SPAN></SPAN><SPAN><SPAN>Map Showing Landslides in the Golden Quadrangle, Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-761-B.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SIMPSON, H.E., 1973, </SPAN></SPAN><SPAN><SPAN>Map Showing Areas of Potential Rockfalls in the Golden Quadrangle, Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-761-C.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SCOTT, G.R., 1972, </SPAN></SPAN><SPAN><SPAN>Geologic Map of the Morrison Quadrangle Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-790-A.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SCOTT, G.R., 1972, </SPAN></SPAN><SPAN><SPAN>Map Showing Landslides and Areas Susceptible to Landsliding in the Morrison Quadrangle, Jefferson County, Colorado, </SPAN></SPAN><SPAN><SPAN>U.S.G.S. Map I-790-B.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>SLOSSON, J.E., 1969, </SPAN></SPAN><SPAN><SPAN>The Role of Engineering Geology in Urban Planning</SPAN></SPAN><SPAN><SPAN>, Special Publication No. 1, Colorado Geological Survey, pp. 8-15.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>VAN HORN, R., 1972, </SPAN></SPAN><SPAN><SPAN>Surficial and Bedrock Geologic Map of the Golden Quadrangle,</SPAN></SPAN><SPAN /><SPAN /><SPAN><SPAN>Jefferson County, Colorado</SPAN></SPAN><SPAN><SPAN>, U.S.G.S. Map I-761-A.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>Note: Within the above documents are included many additional references relating to the preparation of the Geologic Hazard Zoning Maps. </SPAN></SPAN></P><P /><P STYLE="margin:0 0 7 0;"><SPAN STYLE="font-weight:bold;"><SPAN>SPECIFICS</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>Data is in State Plane Grid Coordinates, Colorado Central Zone, NAD83.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P></DIV></DIV></DIV>
licenseInfo: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This data is intended for use by Jefferson County agencies as an aid in internal decision support and for planning purposes only. </SPAN></P><P><SPAN>External use of this data by any entity not under the authority of an elected office of Jefferson County is not constrained to Jefferson County's Enterprise License Agreement. Use by external sources does not confer any warranty nor liability to Jefferson County and its elected offices, divisions and departments.</SPAN></P></DIV></DIV></DIV>
catalogPath:
title: Rockfall
type:
url:
tags: ["geologic","geology","hazard","rock","rockfall","zoning","geologic hazard","rockfall hazard"]
culture: en-US
portalUrl:
name:
guid:
minScale: 500000
spatialReference: