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Site Evaluation. Important Features and Characteristics. Location and Boundaries Surrounding land uses Topography Drainage Wetlands Floodplains Water table Geotechnical Features Contaminated Soils – need for remediation Engineering characteristics of soils – problem soils

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important features and characteristics
Important Features and Characteristics
  • Location and Boundaries
    • Surrounding land uses
  • Topography
  • Drainage
    • Wetlands
    • Floodplains
    • Water table
  • Geotechnical Features
    • Contaminated Soils – need for remediation
    • Engineering characteristics of soils – problem soils
    • Slope stability – slides and slips
    • Erosion potential
  • Existing Utilities and Services
  • Environmental Resources
    • Vegetation and wildlife
    • EndangeredSpecies
    • Areas of unusual aesthetic quality
  • Historical and Cultural Features
location and boundaries
Location and Boundaries
  • Subject of CEE 121 Elementary Surveying
  • Need to know horizontal and possibly vertical locations of known points that define the boundaries
  • These points must be tied into an adopted system of reference that accounts for the curvature of the earth
    • State Plane Coordinate System (SPCS)
    • May use a local coordinate system in some states, but these are being superseded by the SPCS
  • In Nevada, the Civil Engineering PE license does not qualify an individual to do boundary surveys
    • A PLS license is needed
1 location and boundaries cont d
1. Location and Boundaries, cont’d
  • What is taking place on the neighboring sites?
    • Military complex?
    • Urban area?
    • Recreation area?
    • Agricultural land?
    • Mining?
  • How will the proposed development be affected by this land use, and vice-versa?
  • Does the site access public thoroughfares?
2 topography
2. Topography
  • What are the high and low points on the site?
  • How much land is basically flat?
  • Does the site slope in some predominant direction?
  • Does it have mountains or arroyos? Cliffs?
  • How will topography influence layout?
some general principles of contour maps
Some General Principles of Contour Maps
  • All points of equal elevation are joined – contour lines are continuous
  • The contour interval may vary depending on the scale of the map: 2ft, 10ft, 20 ft, 50ft, 100 ft
  • When reading the numbers on the contour lines indicating elevation, determine the uphill direction (it may be the top of the number)
  • Water flows downhill perpendicular to the contour line
  • The rule of V’s – sharp pointed V’s indicate streams in valleys; the point of the V is the location of the stream
  • The rule of O’s -closed loops are normally uphill on the inside and downhill on the outside, and the innermost loop is the highest area.
  • If a loop instead represents a depression, some maps note this by short lines radiating from the inside of the loop, called "hachures".
  • Spacing of contours - close contours indicate a steep slope; distant contours a shallow slope. Two or more contour lines merging indicates a cliff.
3 drainage
3. Drainage
  • Where will water go when it rains?
  • Identify any Floodplains
    • 50 year storm
    • 100 year storm
    • 250 year storm
    • 500 year storm
  • Identify Wetlands
  • CEE 413 Water Resources Engineering I
4 geotechnical features
4. Geotechnical Features
  • Are the soil types known?
    • Some types of soils create construction problems (e.g. expansive soils)
    • Some soils need to drain well (e.g. septic tanks)
  • Are there any soils with toxic substances in them?
  • Are there slopes that pose stability threats?
  • Are there any geothermal resources?
  • CEE 334 Soil Mechanics
5 existing utilities and services
5. Existing Utilities and Services
  • Where are the nearest available public water and sewer lines and what reserve capacity do they have?
  • What roads border or serve the area and how adequate are they to serve the expected development?
  • Where is the nearest public transportation and how frequent is the service?
  • Where are the electrical power sources?
6 environmental resources
6. Environmental Resources
  • Is the site good for solar energy?
  • Is the site good for wind energy?
  • Are there any endangered species on the site?
  • Are there any sensitive areas?
    • Aesthetic
    • Animal and plant species

Landscape Visual Quality Example Source: Using GIS in Landscape Visual Quality AssessmentYingxin Wu, Ian Bishop, HemayetHossain, Victor Sposito. Applied GISVolume 2, No. 3, December 2006

7 historical and cultural features
7. Historical and Cultural Features
  • Are there Historic Buildings?
  • Are there Indian burial sites?
  • Are there other sacred sites?
historic structures approvals needed for alteration source city of jacksonville il
Historic Structures – Approvals Needed for AlterationSource: City of Jacksonville, IL