Board of Directors – Sept. 11, 2024: River Bend Lift Station Application, River Bend Creek Lift Station – Appendix H, USGS Seismic Design Parameters


USGS Design Maps Summary Report

User-Specific Input

Report Title: Avatar – Riverbend Fountain
Sat March 31, 2018 19:11:19 UTC

Building Code Reference Document: 2012/2015 International Building Code (which utilizes USGS hazard data available in 2008)

Site Coordinates: 38.75696° North, 104.74483° West

Site Soil Classification: Site Class D – “Stiff Soil”

Risk Category: I/II/III

Map of southern El Paso County with an arrow pointing to the site location on the west of Security-Widefield:

Map of the River Bend Site location in southern El Paso County

USGS-Provided Output

  • Ss = 0.175 g
  • S1 = 0.060 g
  • SMS = 0.280 g
  • SM1 = 0.145 g
  • SDS = 0.187 g
  • SD1 = 0.097 g

For information on how the SS and S1 values above have been calculated from probabilistic (risk-targeted) and deterministic ground motions in the direction of maximum horizontal response, please return to the application and select the “2009 NEHRP” building code reference document.

Line graph of the MCEr response spectrum

Line graph of MCER response spectrum, with the horizontal axis labeled “Period, T (sec)” ranging from 0.00 to 2.00, with the vertical axis labeled “Sa (g)” ranging from 0.00 to 0.30. The line graph approximately starts at the intersection of 0.00, 0.12; goes to approximately 0.10, 0.27; remains flat through 0.60,0.27; and then it slopes down to approximately 2.00, 0.10.

Line graph of the design response spectrum

Line graph of design response spectrum, with the horizontal axis labeled “Period, T (sec)” ranging from 0.00 to 2.00, with the vertical axis labeled “Sa (g)” ranging from 0.00 to 0.22. The line graph approximately starts at the intersection of 0.00, 0.08; goes to approximately 0.10, 0.19; remains flat through 0.60,0.19; and then it slopes down to approximately 2.00, 0.06.

Although this information is a product of the U.S. Geological Survey, we provide no warranty, expressed or implied, as to the accuracy of the data contained therein. This tool is not a substitute for technical subject-matter knowledge.