HomeMy WebLinkAbout5.a. Adopt a Storm Sewer Master Plan . � - • �
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PtEPiORANDUM
DATE: NOVEAiBER 17, 1989
TO: PiAYQR HOKE
COUNCILMEPiBERS: NAPPER
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WAL,SIi /
WI C1'I�,I�PIANN
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FROAI: STEPHAN JILK, CITY ADPiINISTRATOR � �`��M
R�� ST4RPiWATTR MASTER PLAN �
1'ur:;uanY. tt� diseus,4ion and review of the praposed Stormwater Ptaster Plan as
pre��areci by Barr Engineering StafE has developed Ianguage which could be inserted
in the "Executive Summary" section of the plan as presented to reflect the
conc�erns about the plan and that it shauld not be a "land use plan".
5ucli language is presented here in pages 1-1 and 1-2 and is underlined for yaur
referenee. If adopted the emphasis of underlining would be removed.
Also attached is a proposed resolution which also references,the intended use of
this plan and the emphasis that this is not a land use plan. The resol:ution
would be suitable for adoption of the plan and Staff requests your consideration
to clo s�.
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ARAINAGE PLAN
WEST DRAINAGE AREA
SECTIfJN 1: EXECUTIVE SU1�41ARY
This Drainage Plan was prepared as a combined effort of the Rosemount City
Council, City Staff, a eitizens advisory comnittee, and Barr Engineering Co. It
is intended to be a dynamic working tool for implementing the stormwater eontrol
and management system for the western third of the City. This�.lan is not
intended as a land use �lan for determinin� future use of lands in the study
area. Land use determination is a function of the City Plannin�Camnission and
the City Council through the proper use of the City's Comprehensive Gua.de P1an
and the City's Zoning Ordinance. This area is shown in Figure I (Appendix D?.
The Drainage Plan will be used for designing and constructing main stem
faci.lities, and fpx reviewing new development proposals for compatibility with
the identified drainage requirements. Many options are available whe�
considering location, type, and eize of the system's components. The nature and
number of these options requires this Flan ta be flexible and dynamic.
Tt is therefore essential that the users of the Plan understand its intent,
design par�meters, control�ing factors, and special considerations for
implementation. To assist Plan users, this document is diuided into £ive
sections: Watershed Overview, Study Activities, Drainage Requirements,
Implementation Gonsiderations, and Appendix. Also, the study area has beez�
divided into 19 distinct drainage districts for considering drainage patterns and
system improvements. These drainag� distxicts are shown in Figure Z fAppendix
D).
The "Watershed Overview" sectian discusses the West �?rainage Area and its
presently developed state.
The "Study Activities" section describes the process of Flan develapment,
including:
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* Data Callection
* Lang-Ran�e Land Use Planning
* Hydrologic/Hydraulic Analysis
Data collection activities involved meeting and addressing watersh�d specifics
witt► City Staff, reviewing preliminary development progosals, and obtaining
existing storm sew�r information. Zong-range land use pianning was ne�easary for
the hydrologic/hydraulic ana2ysis. The planning pracess involved the eombination
of existing development information, proposed development plans for undeveloped
and underdevelaped areas, and the judgment of Gity and Barr Engineering Staff.
This resulted in preparing a long-range land use map which was the basis frvm
which stormwater runoff computations were made. This land use map is summarized
in Figure 3 fAppendix D), Assumptions for present and future land use are made
for stormwater control and design calculations only and �hould not be cansidered
recommendations €or future land use determination.
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The hydrologic/hydraulic analysis included deCermining drainage patterns and
the crztitcal 100-year storm flows and volumes. Drainage patterns (Figure 4,
Appendix D) were developed by a joint effort of a citizens advisory co�nittee and
City and Barr Engineering Staff. The citizens advisory cominittee also provided
insight and historical information specific to local areas whieh, in many cases,
would not have been considered otherwise. Efforts by the citizens advisary
co�nittee have made this Plan more com rehensive and useful. The stormwate
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runoff analysis was conducted through the use of the "Barr Hydrograph Atethod"
eomputer model.
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CITY OF RfJSBMOQNT
8xS4LUTI0N 1989 -
A RLSOLOTIQN ADOPTING TRB "CITT OF QOS8IrI00NT
DRAINAGS PLAN - fiBST DRAINAGE ARRA" DATBII
MAF 1989 AS l?BVBLOPBD BY �AAR 8�GI1�E$RIpG
WHERBAS, the C3,ty Council of the Citp of Rasemount has reslized the
need £or planning of th� prop�r cantrol of starmwater runoff in �he
city; and
WHBBEAS, the City Council of Che Gity of Rosemount directec! city
s�aff to receive propasals fram �ngi.neering fira�s to comg�ete euch
a study; and
�1H8R�AS, Barr Engineering was chusen by the City ta comglete a
studp of the western third af the City af Rosemount to det�rmine
a mana$ement system for stormwater cantrol; and
WHSREAS, Barr Engineering worked wi.th citp staff and a citizene
eommittee in developing the proposed pZan; and
WHBREAS, this plan has been completed and presented fo�r review br
the ci.tizeng cvmmittee, the Citp Utilitp Comrnission and the City
Council and a11 have found it acceptable as presented.
R� NOW, THER�FUR$ Bg IT RSSOLVSD that the City Counc3l af the Citp of
Rosemount accepts and approves the "Gity of Roaemount Drafnag� P1an
- t�est Dra3nage Area" dated May I989 as the work3ng tool for
implementing th� stormwater control and management spstem fcar �he
western third of the Citp.
BE IT FURTHBR RBSOLYBD that the City Counc3l recognizes that thie
plan is not intended to represent a ].ar�d u�se plan for the area
studied bat that the Citp Planning Commi.ss3:an and the City Council
will use the City' e Comprehensive G�aide Plan and the City' s Zoning
Qrdinan�e for deterr�ining land use now and in the future and that
assumptions used for present and future Iand uses in thig atudy are
for the purpo�e of setting the mast appropriate criteria for
stormwater management.
AD4FT8D this 2ist day o€ Navember, 1989.
Rol.lan ��oke, Maqor
ATTBST:
--- Stephan Jilk, Administrator Clerk