HomeMy WebLinkAboutPOWERHOUSE 2 - FDP220015 - DOCUMENT MARKUPS - ROUND 1 - DRAINAGE REPORT
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C. FLOODPLAIN
The Powerhouse 2 project is located within a FEMA Special Flood Hazard Area of the Cache la
Poudre River (Poudre River). Most of this area is designated as With Base Flood Elevation (BFE)
or Depth in Zone AE on FIRM Panel 08069C0997G, effective June 17, 2008. The floodplain from
the Whitewater Park Letter of Map Revision (LOMR) Case No. 20-08-0643P, effective June 25,
2021, supersedes the current FEMA RiskMap. An Additional LOMR became effective on
November 19, 2021, Case No. 21-08-1189X, to correct the Flood Zone designations for some of
the islands within the Whitewater Park LOMR. Most of the property falls inside the regulated
Figure 4 – Area Floodplain Mapping
Figure 3 – Proposed Site Plan
NORTHERNENGINEERING.COM | 970.221.4158 PRELIMINARY DRAINAGE REPORT: POWERHOUSE 2
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access gate, other electrical and mechanical systems, etc. must be approved before a
certificate of occupancy will be issued.
All elevators installed below the RFPE in the project will comply with FEMA NFIP technical
bulletin on June 4, 2019, and the 2021 IBC.
An Emergency Response and Preparedness Plan (ERPP) will be required by the City of Fort
Collins prior to a floodplain or building permit being issued.
Outdoor classrooms and informal outdoor gathering space will be used for site tours and
outdoor learning. These spaces will be constructed using large boulders and crusher-fine
surfacing.
Critical facilities are prohibited in the floodplain, including hazardous material, government
services, essential services and at-risk population critical facilities. This includes schools and
after school programs/day camps for grades K-12.
The quantities listed below and the removal of hydrogen storage from the site, will remove the
designation of a "Critical Facility," as defined by Chapter 10 of City Code, from the project.
Material storage restrictions will be removed with the approval of the LOMR.
The following outlines the handling and storage processes of hydrogen for research
procedures anticipated at the proposed Powerhouse 2 facility:
· Hydrogen produced by hydrolysis or similar method will be disposed of as produced
via venting outdoors (as per any code requirements), burned outdoors in a non-visible
flare, consumed by fuel cell or similar device.
· Onsite storage of hydrogen will remain at or below quantities regulated by
international fire safety code or "household levels."
· Hydrogen fueled vehicles, such as automobiles, light and medium duty trucks, and
transit buses, will be tested onsite and adhere to all fire safety codes and DOT
regulations regarding hydrogen fueled vehicles. No vehicles will be stored outside
overnight per the floatable materials requirements in Chapter 10 of City Code.
· H2 storage tanks will remain at Powerhouse 2 until approval of the LOMR.
Flammable Materials:
· Acetylene 1 commercial cylinder at 300 or less std. cu. ft. volume.
· Oxygen 1 commercial cylinder at 300 or less std. cu. ft. volume.
Non-Reactive Gases:
· Compressed Air 500 gal. tank
· Compressed Nitrogen 2000 L. Cryogenic Tank, Liquid
· Compressed Argon 2000 L. Cryogenic Tank, Liquid
· Compressed Helium <20 - 300 std. cu ft, steel cylinders
· Compressed Argon <20 - 300 std. cu ft, steel cylinders
· Compressed CO2 <20 - 300 std. cu ft, steel cylinders
The proposed Powerhouse 2 building is projected to house several types of organizations:
retail, private companies working in the energy industry, and Colorado State University (CSU)
functions relating to sponsored research. The CSU space will be assigned to researchers to