FLOOD03503

• County: Jefferson
• Community: Golden
• Stream Name: Tucker Gulch, Kenneys Run
• Basin: South Platte
• Title: Major Drainageway Planning
• Date: 9/1/1983
• Prepared For: Golden, Jefferson County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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tion of techniques for controlling this source of pollution. In 1972, amend-
ments placed new and stronger emphasis on urban runoff as a source of
pollution. .An accelerated effort. . .. is stressed .. . . to develop,
refine, and achieve practical application of waste management methods
applicable to nonpoint sources of pollutants to eliminate the discharge of
pollutants including, but not limited to, elimination of runoff pollutants....

implementation of non-structural solutions in dealing with flood hazards.
Non-structural solutions include such items as:

Common sources of water pollutants i nc I ude: demo I it i on and construct i on
operat ions; I and gradi ng and excavat i on; soil eros i on from wi nd and water;
material stockpiles; salt used for ice removal; litter; oil and other
droppings from motor vehicles; fertilizers and pesticides; leaves and grass
clippings; dumping of waste materials in storm sewers; neglected maintenance
of catch basins, etc. Data collection efforts have been undertaken in the
Denver Metropolitan area by the U.S.G.S. under the joint sponsorship of the
Urban Drainage and Flood Control District, the Denver Regional Council of
Governments, and the Denver Water Board. The studies, undertaken in 1976 and
1977, indicated that the major components of local stormwater pollution are
organi c compounds, heavy meta Is, oil s and greases. Concentrat ions of these
pollutants vary, but preliminary indications are that organics are
approximately equivalent to secondary sewage treatment effluent and the heavy
metals, oils and greases are predominately in the form of suspended solids.

1. The enactment of comprehens i ve fl oodpl ai n management regul at ions to
control and protect future floodplain development.
2. The purchase of flood insurance by property owners affected by flood
hazards.
3. FI oodproofi ng of exi st i ng st ructures and contents to el imi nate or
reduce the flood damage potential.
4. Development of a flood warning system and evacuation plans.

Floodplain regulations have become familiar to many communities since Congress
passed the Flood Disaster Protection Act of 1973 (P.L. 93-234). The federal
lending restrictions associated with the Act forced many communities to enroll
in the National Flood Insurance Program and to begin enforcing, to some
degree, floodplain management regulations. The Act also prohibited use of
federal disaster assistance in non-participating communities, should a flood
disaster occur. The basic intent of most floodplain regulations is to require
that new construction be protected from the 100-year flood and that such
construction not increase flood levels significantly.

Golden is currently participating in the emergency phase of the National Flood
Insurance Program and will soon be converted to the Regular Program.

This study recognizes the positive impacts on water quality in the design of
detention basins, lined channels and drop structures. Other factors which
would improve water quality are beyond the scope of flood control planning.
Local governments would do well to consider regulations which recognize
sediment and erosion control as a problem, and require land development and
construction practices to adhere to standards which minimize adverse impacts.
In addition, a comprehensive maintenance program could be developed for
streets and storm sewers which would further benefit water quality concerns.

Flood insurance is available to all property owners in Golden. An individual
does not have to be located in a .floodplain. in order to purchase insurance.
Many flood-related damages occur in areas which are not designated as special
flood hazard areas by the federal government. The purchase of flood insurance
wi 11 not reduce the fl ood hazard but wi 11 protect the property owner from
personal financial disaster should a major flood loss occur. Property owners
should be aware that standard casualty insurance policies do not cover flood
losses and that flood insurance pol icies cover losses to the structure and
contents separately.

Floodplain Management

Floodproofing can be classified in four major categories:

The term floodplain management, as it is commonly used today, refers to the

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