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December 19, 2025 Geo Quest Project No. 25-130
Jaime Olivas
970-589-2364
jaimeolivas17@gmail.com
Subject: ObservaƟon and CompacƟon TesƟng of Subgrade and CL 6 for Structural Fill
Mr. Olivas,
Geo Quest (GQ) visited the foundaƟon excavaƟon for a new manufactured home at 146
Quicksilver Court, south of Rifle on December 15, 2025 to observe the compacted subgrade. On
December 16 and 17 addiƟonal site visits were made to observe the compacƟon of 12 inches of
Class 6 roadbase (CL 6) each day. CompacƟon was provided with a steel drum, sheepsfoot,
Dynapac roller. The placed fill was covered with concrete blankets to prevent frost penetraƟon
and preserve moisture content as shown on Photo’s 1 and 2.
A total of 24 inches of CL 6 was placed and compacted within the foundaƟon footprint area
using the appropriate moisture content and degree of compacƟon. The subgrade and CL 6 met
the project compacƟon specificaƟons during proofroll observaƟons and nuclear density tesƟng.
TesƟng with the nuclear density method on the top 12 inches of CL 6 was at 97 to 98 percent of
the maximum dry density of a standard Proctor.
Respecƞully submiƩed,
Geo Quest, LLC
Kevin E. Dye, P.E.
12/19/25
Photo 1 – View looking south, tesƟng on top of 24 inches of compacted CL 6
Photo 2 – View looking west, tesƟng on top of 24 inches of compacted CL 6