Laserfiche WebLink
• (Zones 1 and 2 in this study), it was conservatively assumed that rockfall <br />hazards were present in all the modeled zones. <br />• It was assumed that the road would be temporarily re-located to its old <br />alignment at the western end of the project area. Restrictions, associated <br />with existing powerlines, required that the re-located road rejoin the existing <br />alignment in the vicinity of coordinate 33,000N; 15,000E. <br />The overall approach was subdivided into 4 tasks <br />Task 1: Field Work: Work under this task included source area characterization, <br />foreslope characterization, and collecting Colorado Rockfall Simulation Program <br />(CRSP) model calibration data. <br />Task 2: Data Collation and Interpretation: Task 2 included preparation of a <br />morphology map and boulder catalog. The boulder catalog contains location and <br />• dimensional data for boulders located on the foreslope. <br />Task 3 Model Calibration and Analysis: The scope of work for Task 3 included: <br />• Selecting representative sections for morphological zones and structural <br />domains. <br />• Setting up the CRSP data files for each section. <br />• Calibrating the CRSP model <br />• Running the CRSP model for each section and plotting the results on a <br />contoured plan. Contours were drawn for the 0, 5, and 50 percent <br />passing zones (these contours are analogous to sieve analysis where the <br />50% passing contour represents points on each section where the CRSP <br />analysis indicates that 50% of the modeled boulders have passed). <br />• Concurrently verifying model parameters based on the boulder catalog. <br />• Preparation of a hazard map showing cliff and foreslope contours, position <br />of road and major structures. <br /> <br />4 <br />