C150050 contract docs

• Contract/PO #: C150050
• Contractor Name: Mesa County Board of County Commissioners
• Contract Type: Grant
• Loan Projects - Doc Type: Contract Documents

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land use conditions, without any consideration for potential master planned
facilities, shall be compiled into well organized "baseline" hydrology report and
shall be presented to COUNTY for review and approval upon completion.
2.A.�. Hvdraulic calculations shall be performed to define the water surface
profiles and floodplains for all return period floods listed in Section 2.A.4 under
the projected watershed development condition, assuming no further
improvement along the Drainageway and floodplain. The ] 00-year floodplain
using the existing watershed development condition shall also be determined.
The 100-year floodway shall be deternuned using existing channel conditions
and the projected watershed development condition. ENGINEER wi11 locate
cross-sections at sufficient intervals to accuratelv deternune water surface
profiles for the various flood conditions defined above. ENGINEER has the
option to talce of�' cross-sections from the mapping or to request digitized cross-
sections from COUNTY, in which case cross-sections will be taken and digitized
into HEC-2 format by the contractor providing mapping to COUNTY. If
digitized cross-sections are requested, the cross-section locations will be
identified by ENGINEER on county mapping provided by COUNTY.
ENGINEER will locaxe cross-sections at sufficient intervals to accuratelv
determine water surface profiles for the various flood conditions defined a� ��v�.
and return a set of draftinap to COUNTY showing the locations and length of all
cross-sections within 10 calendar days after they are received from COUNTY by
ENGINEER. ENGINEER shall check the digitized cross-section data for
reasonable representation of the topography and shall conect all sections not
properly located or identified by District. The hydraulic calculations shall be
complete to the extent needed to detemune the capacity and general condition of
existing conduits, bridges, reservoirs, channels, levees, etc., but not including
structural integrity and to the ea�tent needed to determine flood damage estimates.
Completed hydraulic ca.lculations shall be presented to COUNTY and LOCAL
SPONSORS for review.
2.A.6. ENGINEER shall identify existing and potential drainage and erosion
problems, flood hazard problems, and damage estimates, using hydrology and
hvdraulics defined in 2.A.4. and 2.A.5. above. ENGINEER shall evaluate viable
methods of solution on a reach by reach basis, which will eliminate, insofar as
possible, drainage, erosion and flood hazard problems associated with the