FLOOD09347

• County: Denver
• Community: All
• Stream Name: All
• Basin: South Platte
• Title: Nature's Building Codes: Geology and Construction in Colorado
• Date: 1/1/1979
• Prepared For: State of Colorado
• Prepared By: CGS
• Floodplain - Doc Type: Educational/Technical/Reference Information

of Investigation.

b. Show the I ocat I on of a I I
borings on the topographic or
geologic map.

c. Show boring logs, geophysical
logs, or profi les obtained in
the Investigation. This
information generally Includes
location and type of samples;
sol I descriptions according to
the unified sol I classifica-
tJ on; I i tho I og I c descr I pt ions
using standard geologic term-
inology; critical 5011 or
geologic contacts; and ground-
water levels.

7. Test Pits and Trenches

a. Describe the location and
general dimensions of all pits
and trenches and date of
Investigation.

b. I nd I cate the I ocat I on of a I I
excavations on the topo-
graphic/geologic map and
profiles.

c. Provide a large scale descrip-
tive log with sufficient de-
tail commensurate with the
features observed. Insets may
be used if necessary.

d. Show sampie locations If
supp I ementa I I aboratory tests
were conducted.

8. Field and Laboratory Tests

a. Describe the type and objec-
tives of any tests conducted
In the field or laboratory.

b. Describe the sample method and
test procedures.

c. Show the test results on data
work sheets or on summary
tables.

9. Monitoring Programs

a. Describe the type, objectives,
and location of all monitoring
programs In the subject area.

b. State the monitoring period,
the flrm(s) or Individuals
responsible for the care and
disposal of the Installations.

I I I. GEOLOGIC DESCRIPTIONS

A. BEDROCK UNITS: sedimentary,
Igneous, and metamorphic rock
types.

1. Rock type and bedding
orientation.

2. Age of and correlation with
recognized formations.

3. Dimensional characteristics such
as thickness and extent.

4. Distribution and extent of the
weathered zone.

5. Physical and chemical
characteristics.

6. Distribution and extent of
weathered zone.

7. Response of bedrock materials to
natural processes.

8. Mineral occurrences.

a. SURF I C I AL DEPOS I TS: f I uv I a I ,
colluvial, glacial, eolian, mass
wasting, and man-made deposits

1. Distribution, occurrence, and age

2. I dent if I cat I on of mater I a I types
and sources

3. Dimensional characteristics such
as thickness and extent

4. Surface expression and relation-
Ships with present topography

5. Physical and chemical character-
Istics

6. Distribution and extent of
altered zones

7. Response of surficial materials
to natural processes

8. Mineral occurrences

C. GEOMORPHIC FEATURES: landslides,
earthflows, debris flows, mud-
flows, rockfalls, debris
avalanches, fault scarps, soi I
creep, erosion scarps, avalanche-,
paths, and subsidence phenomenon.

1. Location and distribution

2. Dimensional characteristics

3. Age of feature and history of
activity

4. Recurrence Interval for geo-
morphic process

5. Physical characteristics incl ud-
Ing depth, flow velocities, and
impact pressures

D. STRUCTURAL FEATURES: joints,
faults, shear zones, folds,
schlstoclty, and foliation

1. Occurrence, distribution, and
proximity to site

2. Dimensional and displacement
characteristics of faults

3. Orientation and changes In
orientation

4. Physical characteristics such as
brecciation, slickensides, gouge
zones, sand bol I s, sag ponds,
spring alignment, disrupted
drainages, or ground-water
barriers

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