FLOOD04241

• County: Broomfield
• Community: Broomfield
• Stream Name: Nissen Res., City Park, Gay Res., West Lake Basins
• Basin: South Platte
• Title: Flood Hazard Area Delineation
• Date: 6/1/1979
• Prepared For: UDFCD
• Prepared By: Wright-McLaughlin Engineers
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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APPEND I X A
FLOODPLAIN ORDINANCES
ARTICLE 30 FLOOD PLAINS{l)

A-l

BROOMFIELD FLOODPLAIN ORDINANCE

(0) To Pl'otect thE' st,c"ilge rilp'lClt,-' ot f!o";(l p'c'!'s ana to assure
re er:t.,.'J!1 of sefflcient fjOGd\'.~a:.J a"e~ 1.0 uJn'~'e:.: flocd flo\'JS
wh ch can reasonably t,p eXDec~~~ to Cf::.:l" hy:
(1 Recu':at1og f:'iil~:-J":_ IJ'!I':;"":, ~ :<.,,~-,~. .P-_~,:, ..~f.d ~!i.cr'dt~on
of'" channe 1 s by deeO€l': nr. 0 \'" ~ neT' ~ -,(;. 0~' r PI {!( a i: 1 og;
(2) Prohibitlng t;nne(f~,s.1;'J 3~,C d(hr.~c;~'<re'i.d.i,":~J encroachments;
and
(3) Encourag1 n~1 open spa\.':e '.be~ ~!!(r, ::~, ~-HH'l c-u i tur'e and
recreation,
(e) To pratec t the hydr-dtJ i i c ct"!o ~'ac tel"'; s. t. ~ C~ ('; f tb:, sma i 1 l;JQ tel'-
courses, inciud'irg the gulch",~, ;:o;,,"',r-, "d artificial I'iater
channe 1 s used 1'01' conveY' "9 f loi,;,j \'IO ti' rs, Whi ch make uo a porti or>
of the u.-ban dra i nage sys tem by:
(1) Regulating filling, dUH:p'ng and charlflelizdtlon so as to
mai nta i n natura 1 s tOl'age CdPdci ty ond "low f1 0\; characteri s ti cs ;
(2) Prohibiting encroachment ,roto the small watercourses to
mainta1n their vidter carry ~(i9 caPdclty; and
(3) EnCOUjagl ng uses such as g,-eenbe! t, open spece, recy'eation
and rid1ng trails,

SECTION 1. STATUTORY AUTHORIZATION, LEGISLAIIVE DECLARATION, FINDINGS
OF FACT, AND PURPOSE

1,01 Statutory Authorization, This O"djnance fol' tlood prevention and
control is adopted pursuant to the autho~ity contained in Section
139-60'-1, Colorado Revised Statutes, as amended,
1,02 Findings of Fact. The City Council finds that there are within the
City of Broomfield various flood plains constituting natural hazards
of state and local .nterest, the occupation of which is likely to
cause the loss of human life and the destructlon of property, and
that the imprudent occupation of these flood plains will pose a
continuing and greater future danger to life and property, unless
proper regulations are adopted concerning their use and occupation.
1.03 Legislative Declaration - Purpose. The pUl'pose of this Ordinance
is to promote the publlC health, safety, and general welfare, to
minimize flood losses in areas subject to flood hazards, and to promote
wi se use of the flood pi a in. Thi s fl ood pIa i n Ordi nance has been
established with the following purposes intended:
(a) To reduce the hazard of floods to life and property by:
(1) Prohibiting uses which are dangerous to life or property
and/or which are hazardous to the public in time of flood;
(2) Restricting uses which are particularly susceptible to
flood damage, so as to alleviate hardship and eliminate
demands for p;b 1 i c expenditures for rel ief and protecti on;
and
(3) Requiring permitted flood plain uses, including public
facilities which serve such uses, to be protected
against floods by providing flood proofing and general
floo~' protection at the time of initial construction.
(b) To alert flood plain occupants or potential occupants to flood
hazards and which is or may be undertake~without full realization
of the danger by:
(1) Regulating the manner in WhiCh structures designed for
human occupancy may be constructed;
(2) Regulating the method of construction of water supply,
sanitation systems and other utilities, so as to prevent
disease, contamination and ur.sanitary conditions; and
(3) Delineating and describing areas that could be inundated
by floods so as to protect individuals from purchasing
flood plain lands foy' purposes ,..hich are not in fact
sui table,
(el To protect the pUblic from the burden of avoidable financial
expenditures for flood contl'oi and rel1ef by not regulating all
uses I'lithin the flood plain areas 50 as to produce a method of
construction and a pattern of development which will minimize the
pro~ability of damage to property and loss of life or injury to
the inhabitants or the flood hazard areas.

(1)
Excerpted from City of Broomfield Zoning Ordinance February 1, 1976
No, 149, As Amended, November, 1977,

SECTION 2 GENEP~L PROvISiONS

2.01 Jurisdiction: The jurisdiction of this section includes all lands
adjacent to or wi thi n any watercoUf'se wi tl\ 1 n the Ci ty that would be
inundated by the lOO-year flood.
2.02 District Types: The Flood RegulatGfj Disvict cover's the 100-year
flood pl a in, Where deemed to be in tne pub 11 c i nteres t by the City,
and to promote wise use of the flood plaln, the Flood Regulatory
District may be subdivided into the Floodway District and the Flood
Storage District.
The Flood Regulatof'Y District is deflned by computing the lOO-yeat"
flood plain limits under' existing channel and flood plaIn conditions.
The Floodway District for the purpose of subdlViding the Flood Regulatory
District is defined as that portlon of the Flood Regulatory District that
woul d remai n assumi n9 an equal deg.'ee of encroachment extendi ng for
a significant reach on both sides of the stream and causing no more
than a one-half foot rise 111 the 100'}6a" flood water surface profile
or that port;on of the Flood Reguli'tc"^j Di5trict that would remain
after exclud\ng those outside po't1or.s of the F100d Regulatory
District \1her'e the depth of fiew for the iOO-year flood is less than
2 feet or the surface flo~ velo(1ty j5 less than 3 feet per second
whichever criteria would assume the least encroachl'1ent on the flood
plain.
The subdwision of the Flood RE-gu1"to"y Distnet and accompanying
hydr'aulic studies must be based open a1! cf '(he Flood Storage District
reach being filled. Creation of the F10cdway D1strict and Flood Storage
District must be made only '11th the fuil understanding that such

-115'

February 1, 1976