FLOOD05435

• County: Elbert
• Community: Elizabeth
• Stream Name: Running Creek
• Basin: South Platte
• Title: Floodplain Information Report
• Date: 7/1/1979
• Prepared For: Elizabeth
• Prepared By: WRC Engineering, Inc.
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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CHAPTER XI
RECOMMENDEDDRAINACE

CRITERIA

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presently, t~e Town of Elizabeth docl not have ordinances which define
drainage design criteria for new developmentl and for improving existing
facilities. The floodplain delineations for Running Creek and the Elizabeth
major drainsgeways define hazardous aress presently existing along these

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drainageways. Drainage criteria which will
reco""""nded in this scctionof the report.

:reduec future flonddamages is
Based on the input received from

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the town and county officials, drainage criteria is developed which allows
preparation of a master drainage pLan for the town. A master drainage plan
wilt provide an orderly framework of replacing and upgrading inadequ~te exis-
ting facitities as well as facilitating naw developments.

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The objective of establishing dr~in~ge criteria is to reduce drainage
system maintensnce costs and to reduce flood hazards to property and human
life. Constraints due to lack of construction fund availability are co nsidered
in the reco~oded improvements.

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The proposed drainage criteria guidelines are based ona eonsen sus of the
respective parties providing input and are summarized in the following .tate-

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tt is recommended that the Town Council adopt new ordinances to imp le-

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_nt the newpoliciea.

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A. Hydrolo~ie Analysi. - It is recommended that the results of this study
be used ill the al\alysisof flooding potential and thedeterrnination ofOood
n<>ws al<>ng the maj<>t dtai.nagewllYs. This will providO! unifotmi.ty of design

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5-,10-.50-,<lnd

100-year

frequencies

Ft<>od flows for the

throughout the town.
can be determined by

interp<>lation using the discharge

data provided in Table-S.
by plotting the 5-, 10-,

Flood ftows for other frequencies can al.o be obtained

50-, and 100-year value. on a frequency versus discharge graph and reading the
desircdintermcdiatefrequenc,".

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For hydrol<>gic analysis at location. other than along the major drainage-
"'aya, it i.. reco......ndcdthll.tthe procedure. outl[nedInthe Soil Con,ervstion
Service. publiclltion enti.tled "Urban Hydrotogy for Small Wat"rohcds" be follo""d.

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