WSP07002

• File Number: 8449
• Description: Platte River Studies
• State: CO
• Basin: South Platte
• Date: 2/1/1991
• Author: City of Greeley
• Title: Feasibility Study for Rehabilitation of Hourglass Dam and Reservoir Vol. 1
• Water Supply Pro - Doc Type: Publication

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5.2

SITE INSPECTIONS

5.2,1 GENERAL

On August 14, 1990, a reconnaissance of the Hourglass Reservoir site was made by AI Gipson
and Garet Denise of WCC. The purpose of the visit was to obtain data to per/onn a feasibility
level study for rehabilitating the reservoir. Also present during the reconnaissance were Lyman
Flook of McCall. Ellingson and Morrill, Inc. and Sam Boone and Nancy Munns from the City of
Greeley. The weather during the reconnaissance was partly cloudy with moderate temperatures.
There had been no slgnnicant rain prior to the reconnaissance, Mr, Gipson also visited Ihe site
prior to the October 1989 field investigation.

5.2,2 EMBANKMENT

5,2,2,1 Description

The embankment has a crest length of about 2400 feet with a maximum height of about 45
feet and crest wldlh of about 10 feet. A significant portion of the crest length between
aboul Station 8 + 00 and Station 25 + 00 consists of a low dike with a heighl of about 5 to
10 feet.

5.2,2.2 Crest

On the crest, there were no indication of settlements. misalignments, or cracking. There
were a few small rodent holes which did not appear to affect the integrity of the structure.

5.2,2,3 Upstream Face

No evidences of longitudinal or transverse cracking were observed. No depressions, bulges,
or settlements were noted, There were some wave-cut benches which were about a foot
wide on the right side of the main embankment 10 the right of the area covered with riprap,
These benches should nol affect the overall integrity of the structure, The riprap appeared
to be adequate and no evidences of stone deterioration were found, Grass cover on the
dike portion of the embankmenl was somewhat sparse. In the area which was covered with

5-3