PROJ00133

• Contract/PO #: C153633
• Contractor Name: Greeley, City of
• Contract Type: Loan
• Water District: 3
• County: Larimer
• Bill Number: HB 91-1006
• Loan Projects - Doc Type: Contract Documents

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b. Geologic Irwestiq"ltiOflS. The Hourgl"lss Dam si:e will be described.
All readily available data on site conditions will be reviewe:J.
Additional field explorations, surveys and field geologic mapping
win be carrie:J out, as desc::ibej in Appendix A Scope of work
under the Contract: for Consulcing;ProEessional Services daced
Octoberl989, becween the C:cy of Greeley, Colorado and McCall-
Ellingson ard Morrill, Inc. The additional work is described in
Appendix A of that COntract, as follows:

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1.

Perfocm field explorations to evaluate subsurface conditio~s
and ::0 develo!? infor;na::ion regarding charac:eristics of the
soil and rock materials found at Hourglass Dam. This will
include the following:

Two borincs wil~ be located in the maLn dam sechon and shall
be drilled to 80 feet in dept..'l. Two ;rore holes will be
drilled at Stadon 16 + 00 along the dam crest in t.l1e vici-
nity of the dOWl1stre3lll face pending area. These holes shall
be approximately 55 feet in de;?th. Test borings may be,
StDooe:l above t.'1e'deoths described if boulders or dLffic:1lt
dr:.iiing conditions ~re encountered at a very shallow depl:..'l,
for example 20 feet in ::he planned 80 foot hole, ard addi-
tional hole wil.1. be at:t:empt:ed. In eac.'l hole, s"lmpIe atte,npt:s
will be made aOO Standard Penet:ration ~ests (SPr) will be
taken at appro:dmat:ely every 5-1:oot intervals. pllC casing
will be olaced j.neac.'l hol.:t:drilled t.'lrouah the embankment to
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serve as' 'a 'Der~entoiezomet:er.
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2.

A field sur.,ey ::;0 sucole.'1lenc existing topographic and design
illfot:mationwill beper::orinea. This shall i:1clude key spot
elevat:io'hs apput:enant' to the dam and fac:.:!.i ties, bore hole
locations, cri:ical cross sections of t..'le supply canal side
c.'lannel ,spillway'. ::levations will be :ied to Comanche
Reservoir Datum, and horizontal com:rol will be ::ied to
established land comers, if land CDrners are reasonably
access ib Ie.

3.

Per:orm field geOlogic ::lapping to develo!, informa.:ion :or use
in ill:..1scrrtting geologic COnditions at: t."1e site. The repor~
will include a tYPical cross-section representing daca
obtained form t..'le ::est =x>ring program.

4.

The Project: 1".anager of :~e Consul1:aIlc shall be wyman
Flook.

The geologic rep:lr~s, bcluding geologic maps "nd sections, geologic logs of
foundation exploration holes, and la]s oE ~~terials in exploration holes will be
included as an appendix to :he rehabili~.a:::on feasibility rep:Jr::.