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Home My WebLink About6.c. Receive Feasibility Report/Set Public Hearing - Shannon Hills 6th Addition, City Project #251 CITY OF ROSEMOUNT r EXECUTIVE SUMMARY FOR ACTION CiTY COUNCIL MEETING DATE: February 1 , 1994 AGENDA ITEM: Receive Feasibility Report/Set Public AGENDA SECTION: Hearing, Shannon Hifls 6th Addition, Project #251 New Business PREPARED BY: Bud Osmundson AGENDA City EngineAer/Assistant Public Warks Director ,�M # b U ATTACHMENTS: Feasibility Report, Public Notice, AP O E BY; p Mailing List, Resolution ..cr�st.�` � This item is to receive the feasibility report and set the public hearing for City Project #251, 5hannon Hills 6th Addition Street & Utility Improvements. This project includes the construction of sanitary sewer, watermain, storm drain, streets and sidewalks. 7he majority of funding for the project will be from assessments to the Developer, Ground Development. There are storm water lift station costs to be paid for from the Storm Water Utility Fund. Brian Bourassa� P.E., of OSM Engineering will provide an overview of the project. Brian and Staff will be available to answer any questions. Staff reeommends Council receive the feasibility r�port and set the Public Hearing for March �, 1994 to consider the project. ' Although residents in the adjacent Country Hills 3rd Addition on Capper Court are not going to be assessed, and therefore nat required to be notified of the Public Hearing, they will be invited ta the Public Hearing so that they are aware of the proposed construction and storm drainage plans. ' RECOMMENDED ACTION: MOTtON TO ADOPT A RESOLUTION RECE(VING FEASIBILITY REPORT/SETTiNG PUBLIC HEARWG, SHANNON HIZLS 6TH ADDITION STREET AND UTILITY IMPROVEMENTS, GITY PROJEGT #251. COUNCIL ACTION: 1 _, _ _ _ _ � ATTEST: CITY OF ROSEMOUNT DAKOTA COUNTY, MINNESOTA RESOLUTION 1994 9 A RESOLUTION RECEIVING THE FEASIBILITY REPORT /SET PUBLIC HEARING SHANNON HILLS 6TH ADDITION STREET UTILITY IMPROVEMENTS CITY PROJECT #251 WHEREAS, the City Council deemed it necessary and expedient that the City of Rosemount, Minnesota, construct certain improvements, to -wit: City Project #251, Shannon Hills 6th Addition Street Utility Improvements, in the City as described in and in accordance with the feasibility report prepared by Orr Schelen Mayeron Associates, Inc., Consulting Engineers; and WHEREAS, the City Council has been advised by the Consulting Engineers that said utility and street improvements, City Project #251 is feasible, and should best be made as proposed, and the Consulting Engineers' report to this effect has heretofore been received by Council, and filed with the City Clerk on February 1, 1994; and WHEREAS, the statute provided that no such improvements shall be made until the Council has held a public hearing on such improvements following mailed notice and two publications thereof in the official newspaper stating time and place of the hearing, the general nature of the improvement, the estimated costs thereof, and the area proposed to be assessed, in accordance with the law. NOW THEREFORE BE IT RESOLVED, the City Council of the City of Rosemount accepts the feasibility report for City Project #251 and places it on file. NOW THEREFORE BE IT FURTHER RESOLVED, by the City Council of the City of Rosemount that the public hearing be scheduled to consider City Project #251, Shannon Hills 6th Addition Street Utility Improvements to be held on Wednesday, March 2, 1994 at 8:00 o'clock p.m. or as soon thereafter as possible, in the Council Chambers of City Hall. ADOPTED this 1st day of February, 1994. Susan M. W. sh, City Clerk Motion by: Wippermann Voted in favor: McMenomy, Staats, Busho, Anderson, Wippermann Voted against: None g 1- 1. E. B. McMenomy, Mayor Seconded by: Anderson CITY OF ROSEMOUNT DAKOTA COUNTY, MiNNESOTA PUBLtC NOTFCE NOTICE OF PUBLIC HEARING ON tMPROVEMENTS SHANNON HILLS 6TH ADDITlQN STREET & UTILITY IMPaC1VEMENTS CiTY PRClJECT #251 TO WHOM IT MAY CONCERN: NOTICE IS HEREBY GIVEN, that the City Council of the City of Rosemount, Minnesota wili meet at 8:00 o'clock p.m. or as soon thereafter as possible, Tuesday, March _, 1994 in the Council Chambers of the City Nall, 2875 145th Street West, to consider the following improvements Project #251 - Shannon Hills 6th Addition Street & Utility Improvements The nature of improvements shall include the construction of curb and gutter, street surfacing, sanitary sewer, sanitary sewer services, watermain and water services, storm drain, sidewalk, street lights and restoration. The total estimated cast of said improvements is 5474,300. The area proposed to-be assessed far the foregoing improvements will generally be: Shannon Hills Fifth Addition, Outlot A which will be platted as Shannon Hills Sixth Addition, Block 1, �ots 1 - 5; Block 2, Lots 1 - 11; Block 3, Lots 1 - 14. Total of 30 Lots Such person(s) as desires to be heard with reference to the proposed improvements will be heard at this meeting. Written ar oral opinion will be considered. Dated this 7 st day of February, 1994. BY ORDER OF THE CITY COUNCIL. Susan M. Walsh City C{erk City of Rasemount Dakota County, Minnesota � . � � MA1LlNG l.IST SHANNC31�i H1LLS 5TH ADDiT1QN STRE�T & UTILITY IMPROVEMENTS C1TY P��3JECT (VO. 251 PUBLIC HEAR��1G: MA�iCH �, 1994 8:00 P.M. Gound Development Shannon Hilis Sixth Addition 1550 Utica Ave. S., Suite 485 Block 1, Lots 1 through 5 Minneapotis, MN 55416 Block 2, Lots 1 through 11 Block 3, Lots 1 through 14 Letter of lnvitation to: Country Hills Third Addition Block 3, Lots 3, 4, 5, 6, 7 . On ' Schekn Mayeron& Ass�ociates,Inc. 300 Park Place Center 5775 Wayzata Boulevard Minneapolis,MN 55416-1228 612-595-5775 1-800-753-5775 FAX 595-5774 Engineers Architects JaIIu1,ry 25, 1994 surveeors Y Honorable Mayor and Council City of Rosemount 2875 145th Street West Rosemaunt, Minnesota 55068 Re: Shannon Hills Sixth Addition Utility and Street Improvements City Project Na 251 Rosemount, Minnesota OSM Project No. 5408A0 Dear Mayor and Council Members: _ Enc�osed is the Feasibility Report for the Shannon Hills Sixth Addition Street.and Utility Improvements, City Project No. 25L This report addresses the sanitary sewer, watermain, storm drain, street lighting and street necessary for the area. We would be happy to discuss this report with you at your convenience. Please call me at 595-5694, if you have any questions. Sincerely, ORR-SCHELEN-MAYERON & ASSOCIATES, INC. . !� fj�-1,cc�-�' ..,1/ Brian J. Bourassa, P.E. Project Manager Enclosure c: Bud Osmundson, City of Rosemount J:\540&OO�SPEC�OI2994.HMC • Eouai Oonortvnitv Emolover . �7�CUTIVE SUMMAIZY City Project No. 251 pravides for the installation of city streets and utilities in the Sixth Phase of the Shannon Hills Planned Unit Development in westem Rosemount. The project includes the installation of sanitary sewer, watermain, storm drain, pond excavation, and the canstruction of the streets. The majority of the site grading was completed by the developer under a private contract during the 1993 construction season. The impetus for the project was a petition from the developer, Ground Development Corporation. The project is feasible from an engineering standpoint. This Feasibility Report proposes the construction of approximately 1,380 feet of sanitary sewer, 1,630 feet of watermain, 90Q feet of storm drain and a storm drain lift station, and 1,60Q feet of street construction to provide service to 30 residential lots. The total estimated project cost is $474,30Q.00. The funding for the project will come from assessments to the bene�tting properties (lateral improvements), and the stormwater utility fund (trunk storm drain impravements). The project construction can be initiated in May, 1994 with construction substantially complete in July, 1994. OSM Project No. 5408.00 � ,� � ,� . o 0 Feasibility R.eport � Shannon Hiiis Sixth Addition ` ooa LTt�lities ancl Street Improvernents �I City Project No. 25 � � � �ubmitted to �� o � � oserycoun� � _ � P.O. Box 510 • 2875 145th Street W. s Rosemount, Minnesota J5068 � ` OSM Project No. 5408.00 January, 1994 � � � . _�� w� . .. � : „� -�_ ____ � � �� =i� � � ,° ; a x - - ,��. �� . � . .,: � . �,' �— _.__ _ .___.0.� _ � ♦ _. _ -- —-- � • e ` 1 - m � � ' � O� ' Scltelen Mayeron& � AssoCiates,lnc• 300 Park P1a�e Center 5775 Wayzafa Boulevard Minneapolis,MN 55416-1228 �y 612-595-5775 1-800-753-5775 - FAX 595-5774 Engineers Architects �� Planners Surveyors Jan�ary 25, 1994 � Hanerabi� 1VIay+�r and C�u�cit � City of Rgsernc�unt �")5 145t� Street West Rose�4unt, Minne�ta 55t��' r.., � Re: Shanno� Hills Sixth Addiri � c� Utility and Street;Impr+�vements � City Pr�ject No. 251 Rosem�unt, I�Iinnesflta OS�UI Proj�ct i�to. 540$.00 � D ear Mayor and Cc�un�c�l Meulbers: � Enclosed is the Feasibility �ept�rt far ti�e Sha�r�n Hil1� Sixt2i Addi��ic�n �tre�t:ant�d Urility Improvement�, City Prcaject N�: 251: This repflrt addresses the sanitary s��ver, �.te�n, storm drain, str�e�t lighring a�d sireet;ne�cessary for th� area� � We would be ha t PFY o d�scus� thxs repart w�th you a#your converuence. Fiease c�ll m�.at 595-5694, if you have any questions. � _ Sincerely� '� �Z . ORR-SCHELEI'V-l�IAYERON & ASSfJCIATES, INC. � �-�D�-',�+ � Brian J. Bourassa, P.E. � Pr�ject Manager �, Enclt�sure , c: Bud Osmundson, City of Rosemflunt � � � i;�3�t9RaDp�gpi�gl�e�� Equal Opportunit�Employer � : � \ , � � F�ASIBILITY REPt}�'t*T` �' ' S�ANIYON HII.L.S S�X'T'�� ADllIT�tC)N UTILITIE� & 51'�tEET IMPROVEA�tENTS CITY PROJECT NO. 251 � FOR T"HE CIT�OF I�U3�R+IC1Ul�T, MN � OSM Fi�L+UJECT N4, 54�8.4i� � �� J�uary 2�, 1994 � � � � I hereby certify that this plan, speci�cati�n or report was prep�.red by me or under my d�rect super�sion, an� that I am; a duly Registered ProfessiQn�l Engineer unti�r the larvs of the � State of Minnesota. " � ' 1��..��--�- � �`' � '�Brian J. Bourassa, P:E. �J , Date: January 25, 1994 Reg. 1'+io. 21$16 � � �� (�SNi Prvjec# No. 540�.00 .�� . � .� � � � � � . � . � . .. .. . . . . �. . � i � � � . .. . � . . . . . . . . . . . ... . . . . ��. �. � � . . � . � � .. . . . . . �... �... . TaBL�oF cor�lv*rs � TI'I'I.E SHEET � LETTER OF TRANSMITTAL - CERTIFICATION � � TABI.E OF CONTENTS � � EXECUTIVE SUMiVIARY 1. IlVTRODUC'TION 1 � 1.1. Authorization 1 1.2. Scope 1' 1.3. Data Available 1 � 2. GENERAL BACKGROUND � �� 2.L Location � 2.2. Project Area � 2.3. Existing Conditions � � 3. PROPOSED IMPROVEMENTS � 3.1. S�nitary Sewer 3 3.2. Watermain 3 � 3.3. Storm Drain 3 -. 3.4. Street Construction 5 � 3.5. Street Lighting 5 3.6. Permits 6 ;, 3.7. Right-of-way Easements 6 � ` 4. FINANCING 7 4.1. Cost Estimate 7 � _ 4.2. Assessment Area 7 4.3. Cost Recouery 8 5. PROJECT' SCHEDULE 10 � -6. APPENDIX 11 i � - � �, OSM Project No. 54fl8,00 � � � EXECIJTIVE��[�A�Y � . . . � City Pro�ect No. 251 provides for the instailation of city streets and uiilities in the Sixth � Phase of the Shannon Hilis Planne�i Unit Development in westem 12osemount. The project includes the instaliation of sanitary sew�r, watermain, storm drain, p+�nd � excavation, and the construction of tbe streets. The majority of th� site grading was completed by the developer unci�r a private contract during the 1993 constructic�n �, season. The impetus for the project was a petition from the developer, Grc�und Develapment Corporation � The project is feasible from an engineering standpoint. This Feasibility Report propases the construction of approximately 1,38U feet of sanitary sewer, 1,b30 feet of watermain, �� 900 feet of storm drain and a storm drain lift station, and 1,600 feet of street �i construction to provide service to 30 residential lots: The total estimated project cost is $474,3U0.00, The funding for the groject will come frorn assessments td the bene�tting � properties (laterai improvements), and the stormwater utility fund (trunk storm drain improvements). �� The project constructian can be initiated in May, 1994 with construction substantiaily �' complete in July, 1994. � ` � � �' � �} �SM Project I�o. 5408.00 � � � 1. INTRODUCZ'I01�1 � l.i. Authorization - On Decernber 21, 1993, the Rosemount City Coun+cil .� authorized the preparation of an Engineering Feasibility Report for Public Streets and Utilities Construction for the Shannon Hilis Sixth Addition. �' This project has been designated as City Project No. 251, The Developer has subrnitted a petition for th�se improvements. � 1.2. Scope - This project provides for the construction of streets and.utilities � in the Shannon Hills Sixth Addition in western Ros+�mount. Sanitary sewer, wa#ermain, storm drain .and a storm drain lift station, gond excaVation, and streets will be provided tr� the Sixth Addition. The �` Developer,Graund Development Corporation, completed the maj�rity of � the site grading in the Sixih Additian during the 1993 construction season. The remainder of the site grading wili be completed by the contractor that � is awarded the street and utility in�pravements examined in this report. �� 13. Data Available•Information and materials used in the preparation of this report include: � • City of Rosemount Reeord Plans. �� • Comprehensive Water System Plan, October, 1988. • Comprehensive Storm Water Drainage Plan,West Drainage � Area, May, 1989 • Shannon Hills PUD Preliminary Plat and Preliminary � Grading Plan. - • Construction plans from the Shannon Hills Fifth Addition, �: City Project No. 243. : �� OSM Proje�t No. 54Q8.00 Page 1 �` � � 2. GENERAL B�CI��ROITND � 2.L Location-The project is located in the southw�st quarter of the northeast .� quarter of Sect�ion 30, adjac�nt to and west of the Carrollton Additic�n, adjacent to and south of the Cc�untry Hil1s Third Addition, and north of � the Shannon Hills Fifth Addition. The prdject location is shouTn aa th+� Location Map, Figure No. 1, in the Appendix of this xeport. � 2.2. Project Area - The Shannon Hills Sixth Additian consists of 3Q single- � family residential lots. _The Shannon Hills Flanned Unit Dev�lopment consists of 75 acres of single-family residential lots. The Shannon Hiils � Sixth Addition is immediately north of the Fifth Addition. 'i'he project area is cunentiy zoned R-1. � 2.3. Eldsting Conditions - The project area has been graded for the propc>sed � development. The area is comprised primarily of rolling terrain, 'The area generaliy slopes and drains from sc>uth to north and into an existing � stormwater pond (BIR 149) located within the Shannt�n Hills Sixth Addition and the Country Hills Third Addition. � � _ � � . �' , � � OSM Project No. 5408.OU Page 2 ,� � � 3. FROPOSED IMPROVEMENTS � 3.1. Sanitary Sew�r- The propos�d project wiil provide sanitary sewer service � t4 the Shannon Hills Sixth Addition. The progased 8" FVC gravity lines will generally flow from the east to the west to the e�isting extension �, pravided at the Shannon Parkway jCc�bbler Avenue intersection. Four- inch services will be provided to the lots within the Sixth Add�tion. The �I proposed sanitary sewer facilities are shown on Figure No. 2 in the Appendix of this report. � 3.2. Watermain - The proposed watermain faciiities are shown on Figure No. � 3 in the Appendix of this report. An eight-inch watermain will be � extended from the Shannon Hills Fifth Addition and will connect to an � eight-inch stub at the Shannon Parkway/Cobbler Avenue intersection. A�n eight-ineh watermain will also be extended up Clover Lane to serve the � proposed lots witfiin the plat and to pravide for the future development to the north. The proposed facilities include one-inch services to each of ,�; the lots, Hydrants will be installed throughout the project to provide adequate fire protection for the residential area � 3.3. Storm Drain - The proposed storm drain facilities are shown on Figure �; No, 4 in the Appendix of this report. The storm drain facilities will generally drain the proposed subdivision from south to north into the ' � existing stormwater pond (BIR 149) located at the north edge of the Sixth Addition, The proposed piping within the plat ranges in size from 12 � inches to 24 inches in diameter. In accordance u+ith the City policy, aIl storm drain. facilities are sized to transpart runoff fram a 10-year storm � event. Also incl�ded in this project will be approximately 3(�0 cubic yards of excavation for stormwater pond BIR 149. � OSM Project No: 5408.U0 Page 3 � � � � In addition ta the st�rm drain fa.c�Lt�es vv�tlun tbe glat, it �s prop�us�d to construct a-1i£t station and forc�m�in system capabie of pumping 4 cfs at � Pc�nd BIR 149. A drainage review of Pond BIR 149 was �mpieted on Juiy 2, 1992 (see letter in APPendix). The prop+�s�d grading pla;n for � Shannon Hilis Sixth Addition will rovide stc�rmwater stc�rage at Pond B� P � 149 as follows: � Wat�r �levatic�n Pond.�t� 944A 0 Acre Feet � 951.4 5.4 Acr� Feet 955.5 13.0 Acre Feet � The propos�d drainage easement in Shannon Hills Sixth Addition will contain the stormw�ter within Pond BIR 149 up to an elevation of 956.t}, � h+�wever, the e�sting drainage easement in Country Hilis Third Addition � will only contain the stormwater within Pond BIR 149 to an elevation Qf approximately 951.0. The lovvest floor eievation for the e�sting homes u� � Country Hills Third �ddition adjacent to Pond BIR 149 is 957.8 and the lovvest floor elevation for the proposed homes in Shannon Hills Sixth µ � Addition �s 958.0. � The lift station and forcemain system for Pond BIR 149 is propc>seci to be constructed within a drainage easement on Lot 14,Block 3 and will pump � stormwater from Pond BIR 144 to the existing storm drain system on Shannon Parkway. The proposed stormwater elevations for Pond BIR 149 j� are listed as follows: � Normal VVater Leve1 = 944.0 High Water Level = 951A � 4SM Projeet No. 5408.� Pa�e 4 � 1 -- - �� , In order to operate the proposed lift starion at Pond BIR 149, three phase � power vwill need to be installed by NSp to the site. An NSP representative stated that the required three phase power could be installed to the � proposed storm drain lift station for approxunately $12,000.�. This cost assumes that the future city weli is constructed in the same area and can � be served by NSP. � 3.4. Street Construction - The proposed streets are shown on Figure No. 5 in � the Appendix of this report. The streets will be constructed to City � standards which call for a 32-foot wide (face-to-face) street. The street section will consist of 3"of bituminous courses and 6"of Class 5 Aggregate � Base, based on the soils information known at this time. 'The street will be flanked by surmountable concrete curb and gutter. A 9Q-foot diameter �; temporary bituminous cul-de-sac will be required at the north terminus of Clover Avenue. The purpose of the temporary cul-de-sac is to provide an � adequate turning radius for emergency vehicles and for snow plows. The street section design and cost estimate are based on the assumption th�t �; an acceptable subgrade is provided by the grading operation,for which the Developer is responsible. A small amount of sodding is provided in this � project for erosion control. � 3.5. Street Lighting - The proposed street lighting is also shown on Figure No. 5, in the Appendix of this report. The proposed lighting units are the � Type "A" units which are 15 feet high poles with post top mounted fixtures. The feed points and connector runs will also be installed. The � local electric utility in this project area is Northern States Power Company, which will install all of the electric utilities for this project under a � separate contract with the developer. � OSM Projeci No. 54Q8.00 Page 5 � � � � � � - 3.6. Permits-Permits will be required ftom the following agencies: Minnesota � Department of Health for the watermain construction; Minnesota Pollution Control Agency and Metropolitan Waste Control Commission � for the sanitary sewer construction; National Pollutant Discharge Elimination System(Minnesota Pollution Control Agency)for the erosion � control construction. � 3.7. Right-c�f-way Easements - The 60-foot righi-of-way and all necessary easements are anticipated to be dedicated by the Developer on the final � plat. The rnajority of the facilities are located within the right-of way, however, drainage and utility easements will be required from Lots 8 and `� 9, Block 3 for a storm drainage line and Lot 14, Block 3 for the stc�rm drain lift station. The drainage easement for Lot 14, Block 3 will need to � be relocated. No additional drainage easements will be required from Country Hills Third Addition � In addition,the 90-foot diameter temporary bituminous cul-de-sac required �, at the north terminus of Clover Avenue will require temporary easements from Lot 5, Block 1 and Lot 1, Block 3. The duration of these temporary �, easements will be dependent on the development of the property to the north, whereby the temporary cul-de-sac can be eliminated. As an � alternative to providing temporary easements within the plat, Ground Development Corporation could negotiate with the adjacent property � owner (ta the north) to allow construction of the temporary cul-de-sac to the north of the Shannon Hills Sixth Addition property line. � � � � � � � OSM Praject No. 5408.00 P�ge 6 � � �' 4. FINANCING � il Cost Estimates can be found in the A ndix of 4.1. Cost Estimate-Det�. ed PP� this report. The following estunates a�e based on 1993 cc�nstructic�n costs � and include a 10% contingency factor and reiated administrative costs. The administrative costs are estimated at 30% and include legal, � engineering, interest, and other administration. A summ,ary of these costs are as folivws: '� A. Sanitary Sewer . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 50,7t10 � B. Sanitary Sewer Services . . . . . . . . . . . . . . . . . . . . . . . 15,940 C. Watermain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55,500 D. Water Services . . . . . . . . . . . . . . . . 15,900 � E. Lateral Storrn Drain . . . . . . . . . . . . . . . . . . . . . . . . . . 48,2� F. Trunk Storm Drain . . . . . . . . . . . . . . . . . . . . . . . . . 14$,9t)0 G. Street . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131,tw0 ,�i H. Street Lights . . . . . . . . . . . . . . . . . . . . . . . . � TOTAL PROJECT COST . . . . . . . . . . . . . . . $4,.�4,3,�Q � � ' 4.2. Assessment Area-The following parcels of land are located within the proje�t � � and assessment area: Shanpon Hills Sixth Addition: � Block 1, Lots 1 through 5 Bloek 2, Lots 1 through 11 � Block 3, Lots l through 14 Total af 34 Lots � ,. � � OSM Froject No. 54U8.00 Page 7 � � � � - 4.3. Cost R�very 4.3.1. Assessment: Th�sanita�y sewer,watermain,lat�ral storm tirain,street � li ts, and street construction within the prttpo�ed for the Sh�nnt�n � Hills Sixth Addition are regarded as residential equivalent si�ing a�d � therefore will be 1�°10 assessable tc�wward the benefitting lots ineiuded ' in the Sixth Addition. � The trunk stc�rm drain improvement inclucies the lift st�tion a�d � forcemain s t�rn required to outlet Pand BIR 149. It is prap�sed to � assess the trunk storrn drain improvements on an area-wide basis. The � otal area tributa to Pond BIR 149 is 3b2 acres, which inciudes t �'Y � acreage from the following praperties: Shannon Hills Developm�nt 19.3 Ac � Country Hills T'hird A�idition Devel+apment 6.9 Ac Undeveloped Property to North �� 36.2 Ac � _ The portion caf the trunk storm drain improvemenis attnbutable to the � Shannon Hills devclopment is: �� 19.3 * �148,900 = $79,400 36.2 � The remainder of the trunk storm drain improvements will be paid for from the stormwater utility fund - $69,500. � � � OSM Projeet N4. 54fl8.� �� $ � � � � st attributabie to the Sixth Addition is: The total estimated pro�ect co � _ L,aterai Improvements $325,4� Trunk Improvernents - � '�� Q � Total $4(��i,804 � �stimated If this amount is spread over the 30 lots, it prc3duces an � assessment rate of $13,5� per lot. 43.2. Pending Ass+�ssments: There are no pentiing assessments against th+e � project area at this time. � � � � � � � � � � � OSM Pro}eet No. 540$.00 Page 9 � ,� � � s. p�oa�c•r sc�nu� � The proposed schedule for this impro�ement is as foilows: � Receive Feasibility Iieport/Set Pubiic Hearing . . . . . . . . . Februa�r i, 1�94 Hoid Public Heari Order Plans and S. e's . . . . . , . . . . . . February i5, 1994 � �/ � Accept PTans and Spec's JOrder Ad for B�d . . . . . . . . . . . . . . . . . Niarcl� 15, 19"4� I'! � Bid t}pening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Apri18, 19� x��V� B�a�/aW�a co�t�a� . . . . . . . . . . . . . . . . . . . . . . . April 15, 1994 � Begin Const�uction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . May, 19�4 Substantial Completion of Construction . . . . . . . . . . . . . . . . . . . . . 3�a1y, 1994 � Final Wear Course Installation . . . . . . . . . . . . . . . . . . . . . . June 1, 1�r � Assessment Hearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fall, 1�9� � First Payment with Real Estate T�es . . . . . . . . . . . . . . . . . . . May, 1� � � � - � �` � �` � � QSM Project No. 5408.� Pag� 10 � � PRELIMINARY COST ES'i'IMA1'� � SH[ANNON HILLS SIXTH AD��TION UTILITY AI�D STREET IMPROVEM�I�'TS CiTY UF �4SEMOUNZ', � CI'TY PROJECT NO. 251 OSM PR4JECT N4. 540�.04 � A. SANITARY SEWER I'TEM I't"EM Q'I'Y UNI'I' AMt}U1i�'T � NO. PRICE 1. Connect to Existing 8" Stub 1 EACH 5500.00 $S00 � 2, 8„ PVC SDR 35 Sanitary Sewer 1380 L.F. $1$.00 �24,840 3. 4' Diameter Manhole (0'- 1Q') 7 EACH $11Q0.00 $7,7t� ,� 4: Excess Manhole Depth 17 L.F. �1�.04 $1,7(� 5. Granular Foundation 60 TONS $12.00 $'�ZQ � Sub-Total $3S,46U + 10% Contingencies $�,546 � Estimated Total Construction Cost $39,Of� + 30%a I.,egal, Engineering, Administrati�e and Financing $11,694 � TOTAL ESTiMATED SANITARY SEWER PRtJJECT $50,7Ut� COST � � B. SANITARY SEWEit SEI�VICES ITEM ITEM QTY UNTT AMOUNT NO. PRICE � l. 4° PVC SDR 2b Setviee Pi e 12U0 L.F. $$,00 $9 600 P � � 2 8" X 4" PVC Sewer Wye 30 EACH $50.(� $1,5{� Sub Total $11,1� � � 10% Contingencies $1,110 Estirnated Total Construction Cost $12,210 � + 30% Legai, Engineering, Administrative and Financing $3,690 TOTAL ESTIMATED SANITARY SEWER SERVICES � PROJECT COST $15,9t)0 � � � C. WATEI�NiAIN � ITEM ITEh+i QTY UNIT AlUIOUNT NO. PRICE � 1. Connect to Fxisting Stubs 2 EACH $5�.00 $1,(�0 2. 6" DIP C1ass 52 Watermain 60 L.F. $14:00 $84U � 3. 8" DIP C1ass 52 Watermain 1570 L.F. $1b.00 $25,12f3' 4. 6" Gate Valve and Box 4 EACH $400.(� $1,b00: � 5. 8" Gate Valve and Box 6 EACH �475,EE� 2,854 6. Hydrant 4 EACH $115U.00' 4,6i�?` - � 7. Fittings 1400 LBS 2.U0 $2,�0(} Sub-Total $38,81U � + 10% Contingencies 53,881 Estimated Total Construction Cost $42,691 � + 3U% Le al, En 'neerin Administrative and Financin $12,809 � � � g � TOTAL ESTTMATED WAT�RMAIN PRUJECT COST $SS,SUU � D. WATER SERVICES � ITEM iTEM QTY UNIT AMOUNT N�. PRICE � � 9. 1" Corp. Cocks 30 EACH $SS.UU 1,650 10. 1" C`urb Stop & Box 30 EACH $75.00 2,250 � 1L 1° Copper Service Pipe 12� L.F. $6.� 7,200 : Sub=Totai $11,100 � + 10% Contingencies $1,110 Estimated Total Construction Cost $12,21U � + 30% I.egal, Engineering, Administrative and Finaneing $3,630' TUTAL ESTiMATED WATER �ERVICES PROJECT � COST $15,900 � � � � E. LATERAL STQRM DRAIN � ITEM ITEM QTY IJNIT AMOUNT N�. PRICE � 1: 12" RCP 42 L.F. S21 �882 2. i5" RCP 72 L.F. �23 51,656 � 3. 1$" RCP b1Q L.F. $25 �15,25U 4. 24" FES VV/T.G. 1 Each �9� $900 � 5. Std. Manhole (0-li?) $ Each $1000 $B4Of� 6. Shallow CB 2 Each $'� �1,8t}0 � 7. Clas� iIT Rip Rap 6 C.Y. $50 �3(� 8. 24" rcp 14U L.F. �31 54,344 � 9. 30"X24"' Reducer 1 Each $4U0 � 10. Remove 18" F'ES 1 Each $20U �2{� � Sub-Total $3�,728 � + 10% Contingencies �3,3'73 Estimated Total Construction Cvst $37,1U1 � + 30°�o Legai, Engineering, Administrative and Financing $11,099 TOTAL ESTIMATED LATERAL STORM DRAIN PROJECT C4ST �4�,200 � � � � � � � � � � � F. TRUNK STORM DltAil�i � ITEIVi ITEM QTY UNIT AMpiJI'�'I' NO. PRICE � 1. 15" RCP 1t?O I..F, $23.� S2,3t�Q 2. 15" FES 1 Each $600.00 $50U � 3. Lift Station 1 L.S. $75,OQ0.00 $?�,000 4. 10" Forcemain 1� L.F. $18.�1 51,8� � 5. Pond Excavation 30� C.Y. $5.00 $15,0(N3 6. Pond Restoration 1 L.S. $1,Ot�3.00 $1,0� � Sub Total $95,7�0 +10% Contingencies $9,570 � Estimated Total Construction Costs $ia5,270 +30% Lega1, Engineering, Administrative and Financing $31,630 � Sub Total �13b,851 NSP Service Charge $12,(�0 � TOTAL ESTIMATED TRUNK STORM DRAIN PRUJ�C"I' C�4ST $148,940 � - � � � � � � � � � G. ST�tEET � ITEM TT'EM QTY UNIT AMOUNT NO. PRICE � 1. Mobilizatifln l L.S. $3(�.04 $3,(� 2. Cleanup 1 L.S. $5,�0,00 ` �S,t�U` � 3. C4mmon Excavation �U40 C.Y. $2.U0 $2,UOU 4: Granular Borrow 14i}0 C,Y. $5.00 �S,i�U � 5. Subgrade Preparatic�n 1b R.S. $125.� $2,OOQ 6. A�gregate Base, Ciass S 2400 TON $7.50 $18,OOQ � 7. Type 31 - Bituminous Base 460 TOI'�T $21.U4 ` $9,bbU Course � 8. Type 41 - Bituminous Base 460 TO1V $23.(� $10,5&0 Course � 9. Bituminous 1Vlaterial for Tack 28fl GAI.. $1.50 �4�0' Coat 10. Concrete Curb & Gutter S418 3120 L.F. $S.SO 517,1G0 � 11. 4,, Concrete Walk SU00 S.F. $2.0(1 $16,000 � 12. Seeding 4.35 AC $20� $7U0 13. Sodciing 1050 S.Y. 52.00 $2,1� � Sub-Total $41,624 + lp% Contingencies $9,162 � � Estimated Total Construction Cost $1{�,'7�2 + 30% Legal, Engineering, Administrative and Financing $30,218 � TOTAL ES'TIMATED STREET PROJEC`T COST $131,0� � � � � _ � : � � � H. STREET LiGHTS � ITEM TTEM QTY UP+1IT AMOUNT NO. PRICE 1. Street Lights - Type A, Wired 3 EACH' �1900.00 $5,7U0,{�U � Complete Inplaee Sub-Tota1 $5,7U0.t� � + 10% Contingencies $570.0� Estimated Total Const��uction Cost $6,27�.40 � + 30% Lega1, Engineering, Administrativ� and Financing $1,934.� T4TAL ESTIMATED STREET LIG�ITS PROJECT ` $8,244.UU � COST � � � � ' � � � � � � � � � . . ,,. . . . . . . .. . .. . . .. . . .. . . . . � �� > � � . . � . . � . . . Q � . W . � . � . .. . � .. .. . . � UPPER � �-. � �35TM ST. Z a Q � , Q J 136TH ST. W. m 437TH Sfi . W: �1. DANV u.(c� a � . � � . �. � � �1 � ROSEMDU �IT � ,3��` � i � Q �� G ,� 199� POP . 8622 � Q'' � Q � �A� �'r�'� �`z- r ~ �� CONN EMA TR. � PROJECT v 'aC�`a c� Z �'�• ..�� l��/� � a� o � �... �R o �, '�p�� ,' �0 PE4 .� Z � v Q � J O w�Y 6, � � r �Og$ � � � � N d ,o O�`N Y p,y�. ' 1M�U� � ��' Av � �- S � �C-� : �AR N �' ,``Z'1 1 T C��L� > 142ND ST ��RgpC� Q�. � V�1P a 19 20 � d � ° ~ 30 29< v> u � � w �m DAVENP�� 'OqTH Z �R�'�� T115►v R�9w Q -T p Q Z �43R� ST. W � 33 p �ANT m 143RD � m w = .Z �4�RC3 ST. z � . � �� o WAY o UPPER u Q7�� 144TH ST. � 4.. �'H S T. W. � 145TH v v ST. W. Y � ,_.. Q 7 a_ i- W � � _ Q z � � x > 145T ST. � �w a ¢' 146T � SL J ao �' 77 ¢ a � � ua = w� W � Q j q ? , ��0� 14bTH w � LOWER 147TH � s Q � � � o .Q a� a oO� � ST. 147T a' ST; � � • J � � W Z a DAf`1,�9¢ � .�� S � � UPPER 347T �T. � � � 3 a ¢ J� d ,l.i '�� 14 8 T H S T. ,_, { 3TH o � � 9� � > a � z � UPPER �-' 14$TH ST. z � . 1 � Q : 76. �o w J o v LOWER . �T 33 $ 6. > � Z LOWER g� 149T � $3: 84.� 149TH ST. w i o � � � � o' UPPER i 49Tt{ST. 149TH 150TH ST. �a i 149TH ST. W. w � u S T. ¢u 3. � � U �� W ' / Y > 9G!c�,- `T DRAWN BY DRAWING TITI.E COf�1. N0. P s M °scrR,��N LOCAT I ON MAP s4�s � A`YE�o"Ta� SHANNON H I LLS 6TH ADQ. SSOC I A ES, I NC. DATE: FIGURE ��N � $ ENGINEfRSr AflCHiTECTS■ PLANNERS. s�YEYORs C I TY PROJECI' NO, �S � � 389 PARK PI,ALE CENTEFi� 5775 M,�YZAiA BOUIEV�RO , ;Q9� �,.�.��,�. �, «.,�.,��. �.�.�o�.�� ROSEM4UNT, MI Nt�IESOTA 54 8L GN ` � � � ` � � � 200 4�J0 � � , SCALE IN FEET f � � � � ,_ -_� ___�- _ _ - __ ___ __�_ _____ __ _____�_ '`}'' ,___�, � � �' ounar � . . .�. � 1. I �� 8.. � b . 5 . . 4 � � f. � � y�+ : 5.� i .�. ��. � I �{ t3 t2 71 78 9 �ys j I �' i a N�� N, � 3 z 1 �' � � � ��A7 � � � � Y � a OBBLE ' P�p t � � �`�'A ¢ P�° ! k 1--< < e' <_,_�...-� 1 � � `�pyF'Q�� pOtt 2 r\ /9 c � I Z 6j� 4 3 � i'� 3 � 5 e � � � 1t �0 9 8 7 � ...�� . � I Q ,� x , ' t --- ----- : : , �: t � 1 -- �' ' . ' ��} '-' '- Z — _ � .,: * -� i _ . - . i i , . � � _ � � I � � � � � � DRAWN BY DRAWING TITLE COMM. N0. P s H °cHEiEN SAN I TARY SEWER 5�� MAYERON & DATE: nssocinr�s, INc. HANNON H I LLS 6TH AD� I T I ON FIGURE , p ENGINEERSs ARCMITECTS■ PIANNERS. s�aYEYoas � I TY PROJECT N4. 251 J AN �p, 90! PaAK PLACE LENTER■ 57�5 MAYZATA BpULE4AR0 � 1994 ""`'�"�'�'S. � 55„6-,2��. 6,z-5�-5»5 ROSEMOUNT MI NNESOTA � � � � 0 2�0 4Q�0' � ' � _,.. ' SCALE IN FEET � � ,_ ___ __ __ __ _ _ __ _�_ ___ ____ __ _______ ' OUTLOT I � � � � a s 4 � T s � � � . I s si I I 1� �g 12 11 10 9 5 I �#��„\" 2 � ( I 2 P�No � � 4 � � Y ..-�-�-�w--n, �ry� � � �, . t � o`- 0B8LE �v 4�p��--��+ �, A ��'�=� 1 ` V� � '._,.....�, . �._._.—�_�__�_8��—�_��,/ �111 N 3 2 � �'�pt�/` 3 1 I zo 6tt; 4 i j � I Z 5 � � � � z . � _ ��. � � �6� �i _ �� j i N 10 9 8 � .. i3 � 7 � t' . . : : . � � .. � .� �.�, .� .. ,� � :a� . ; . � . � . � �� I .. � � . �.. . . . .��..�.� .�.��.�...� � . . . . . � � .i 1 �� V . � . . ' '. . . � t�. . . .. ' . . . . � � � � . ' � ' � � . . � � � . � � . ' . � � . . � .. .. . . � . � �.. �� . I.� . . . .. . . . � _ . 4 � ORAWN BY DRAWING TITLE C0f�1. N0. � P s H °sc��Er� WATERMA I N s��s � MAYERON & DarE. �assoctArEs, tNc. HANNON H I LLS 6TH ADD I T I 0 FIGURE � O f►4iGi NEERS a ARCMITECTS. Pt�►�NERs. s��fYo�s � I T Y P R 0 J E C T N Q. 2 S 1 .�AN �p, 3f8 PARK PLACE CENIER■ 5775 M�YZAT�BOULEVARt3 1994 ""�"`'°�'S, � SS„6-,�3�. 6,2-5�-s"5 R O S E M O U N T M i N N E S O T A � �aoiRp� nr,r� � � � � P} 2Q1PJ 4�J� , , � � SCALE IN FEET � :;: � .. �_ ......_ —_ — _ _ __ ___ ____ ___ _ __ ��.— ___ OUTLOT � ( �� L.S. P� 5 1 � :._ I .... BIR t� � 6 4 S ( I B � � � � �a i 3 �2 �� e 9 sHt�-�'S 2 I I i < Y\PNN � � `p ��< R—.�CP�c�$. 3 4 ! � � �9 c�� q{.� � � � 6 �,VE I � a OBB�E �' �,� P I 1 � �y f I Op�i 2 � 3 � � � Z 61� 4 � o� Q t � ' Z 5 � ' I z a i� r n� I I = " ,e � � ~` :� � a 1 ' N �g . . . .. � 1 . , � �-- — ��— � -- � '^ . . �.; . � �...�� .��.�........� � � . . � � - � � . . , � .. . . . . . � . '�. .:;, ' ; _ I _: - fi � . . <. ! ,_: ., '. ' � , I ' � + 1 ' � ' � i � t DRAwN BY DRA�i NG T I TLE COt�t. N0. P s H °scHE�EN STQ'RM SEWER s�ae � � MAYERON 8� , ASSOCIATES, INC. DATE. HANNON H I LLS 6TH ADD I T I QN F IG11RE p ENG INEERS� ARCHI TEGTS■ P��►��as. s��eYo�s � I T Y P R 0 J E C T NO. 2 51 J AN �c7, 9Q8 PARK PL�CE CENTER� 5775 Y#YZATA BO1N.fYARp L� � niNnE�POUS. rN SSsib-1229� 612-595-57�5 �994 ROSEMOUNT MI NNESOTA 5408P3 DGN ! i .::` ; i � � 2QJ0 4f�0` � ' , , SCALE IN FEET � , �.r ___ _ _ _ _ _ _ _ __��. __�_._ �_ _�_�_ .. . OWti07 _a � t � . . - � �. � � . � 6 : �..5.� � 4 . . . . g ( � _ 8 � 14 t3 �2 �t �g 9 S 32' STREET F-F 60* R.d.1W. I ��'ti 2 i I ` �pt�N� 7 3 4 1 ,.-,...-, ; � 32' S1�REET �-F ,. ; � � Y 60' R.0.W. •:, ' ` . � . � � a OBBtE �'V ., ��R 4 � . . • . � . ::' . . .. c1 � ��,o ' - Oa`�� 2 3 ; � f Z �j� 3 � ' t I z 5 4 8 I i z 6 �� 1 N t1 10 9 8 � � iii 2 I + .� ,� ' , �. .: . t � ' �; , : j . . , :'�' . . I. ...�� .� '* " '_:' . ..'�t . � . �.�.��,„�.�� . ' � � . . . .. . � . . .. . . � . � i ' . � '.. �. . � � � � � � � . � �. . � I � . � � � ;LIGHTIt�G .t � ., t' •i( I � : (TYP.f. . � � ' . I � � � � � � DRAWN BY DRAWING TITLE COi�i. N0. ` P s t� °cHE�EN STREET & L. I GHT I NG 54�s � M,4YEi20N & DATE. assoctaTEs, INc. HANNON H I LLS 6TH' AD�I T I0 FIGURE ' ENGINfERS� ARCHITECTSs PLANN�RS■ s��EYORs- C i TY PROJECT NO. 2S� � J A�' ��, 380 P�Rx PtaCE CENTER■ 57i5 w�ri�T� BOuIEv�RD �994 "`""E"Po�'S, "" 55.,6-,�2�. �,,�-`95-5'�s ROSEMOUNT MI NNESOTA 5408P4. DGN � �j � -� ,�, , Orr �'� Schelen ! . � . � . �fi . . . � �� " n9ayeron& � Associates,inc. 2021 East Henne�in/�venue �uly 2, 1992 ,��innea�olis,ntN 55�i►3 � 612-331-5660 FAX 331-3306 �ngineers Arehitects Pianncrs � Mr. Bud Osrriundson, P.E. su►veyors City of Rosemaunt 2875 145t1i Street West ' Rosemount, MN 55068 Re: Pond BIR 149 ` Rosemount, MN City Project No. 234 OSM Project No. 4942.20 � Dear Mr. Osmundson: , We have reviewed the drainage for Pond BIR 149, located on the North edge of the Shannon Hills property. Based on the available information, we have the following � comments: ��''t Pond BIR is a lanci-locked pond. Approximately 6.9 acres of Country Hills Third Addition and approximately 35.7 acres of undeveloped area (future Shannon Hills , Additions) are tributary to Pond BIR 149:(see attached drainage map). For the purpt�se of this analysis ��ve considereci this area to bz fully developed. � The City of Rosemount - Drainage Plan - West Drainage Area (May 1989) delineates the flow direction from Pond BIR 149 ta BIR 147 and ultimately to Birger Pond. The Drainage Plan also delineates an existing facility outleting Pond $IR 149. In reviewin; � the Rosernoun:t Record Dra��vings and the pond site it was determined that there is no _ eaisting storm se�Wer facility outleting Pond BIR 149. It shauld also be noteci that the ' existing pond levels for Pond BIR 149 are lower than those for Pond BIR 147, therefore, a pumping system ��ould be required to outlet Pond BIR 149 to Pond BIR 147. � There is an existing 18" RCP storm sewer located on Shannon Parkway adjacent t4 Pond BIR 149 that drains to Pond BIR 146. However, the elevation of the existing storm sewer is higher than Pond BIR 149 and a purnping system would again be required to ' outlet Pond BIR 149. The City of Rosemount Drainage Plan recommends that low floor elevations near land � locked basins shouid be at least 5 feet above the basin's 100 year flood level. We used a 100 year - 24 hour and 100 }�ear - 10 day rainfall events to analyze Ponci BIR 149. ' ' A copy of Table 7 (Drainage Requirements Birger Pond District) and Table 17 (Drainage Requirements Hawkins Pond District) frorn the City of Rosemount Drainage Plans are attached. A copy of the ponding calculations and summary are also attached. , � Cqual Op�+��rwnrtc f.m;+ln;c•r � � �.�ir. Qsmundson ' July 2, 1992 Page 2` ' Bas�d on the availabl� inforrnation, we believe the following outlet alternatives are ' available: 1. Do nothing, This no build alternative was considered. Hawever, Qur'study � indieates that once deveioped the 100-year flood level wauld be at an elevation of 958.5. This alternative is not recommended because the existing homes in Country Hills 'I'hird Addition, adjacent to Pond BIR 149, have a 1ow floor , elevation of 957.3. 2. Gravity autlet to Pond I-�AW 182 locateci in Shannon Hills 2nd Ad�iition. The � elevations of Fond HA.W 182 would allow Fond BiR 149 to drain, hawever, the - topography between the two ponds is considerabiy higher and the construction of' the storm sewer outlet would require stc�rm sewer pipe depths of approxitn�tely 4U � feet. Estimated Project Cost = $1:20,3U0 ` 3. Increase size of Pond BIR 149. This alternative would require th� excavation of approximately 2�,000 cubic yards of material to increase the storage capacitv of Pond BIR 149 to 19.5 Ac-�'t. This could b� accornplished by excavating Fand ' BIR 149 entirely within the Shannon Hills property. A copy of the proposed grading plan is attached. As shown on the Pond BIR 149 Summary Sheet the HWL wouId be at 955.8 which is 2 feet below the lowest floor elevations of the � existing hornes adjacent to the pond (957.8). It should be noted that this alternate does not provide an outlet for Pond BIR 149. � �stimated Projeet Cost = $60,OOfl.4fl 4. Install a lift station and fc�rcemain at Pond BIR 149. This alternative was � reviewed and it was determined that a pump would not be able'to keep up with the high peak inflow at Pond BIR 149. In additian to the pumping problems, the ' existing storm sewer along Shannon Park�vay does not have the capacity to handle the peak outflows from Pond BIR 149: � 5. A combination of alternatives 3 and 4 was also reviewed. Fond BIR 149 could b� increased in size to handle the critical storm event and after the storrn has terminated, the lift station and it�reemain system cauld be activated and the pond ' Ievel could be reduced from the peak elevation to its nornnal water level over an extended period of time. � � ' , ' Mr. Osmuncison July 2, 1992 , Page 3 ' • able to handle the This ait�rnative aliflws flexibility in that the pond alone �s critical starm event and that after the stormwater has passed through the storrn isewer system downstzeam to pond BTR 146 then Pond BIR 149 couId be pumped into the existing storm sewer along Shannon Parkway without tl3e risk of overburdening the system. , Estimated P'roject Cos� = $95,040 We would recommend consideration of Alternative No: 5 - the combination of increasing ' the capacity of Pond BIR 149 and providing a lift station and forcemain system ta pump down the pc�nd after the storm has terminated. With this alternative no construction would need to occur until the final phase of Shannon Hills Addition is completed. At � that tirne the additional pond grading and 'lift station could be installed. If you have any questions regarding the above information, or if you need any addition�l � information please contact rne at 378-6380. � Sincerely, ORR-SGHELEN-MAYERON , & ASSOCIATES, INC. �t/..r./�^ � ��'li✓r-G`'�- � � - Brian J. Bourassa, P.E. - � : aaa ' Enclosure ' ' , � ' ' �I � 7-2-92 Pond BIR 149 Summarv � Draiz�age area = 42.6 Acres , Zoning - Single - Famiiy Residential (CN=75) ' Peak Inflow = 146.5 cfs * 384.b cfs �* , Peak Storage Volume Re�uired = 8:3 Ac-Ft * � 19S Ac-Ft ** � ' Sta�,.e Stora.�e Information - ' Existin� Conditi�ns Pro,�>c�sed Conditions 944.0 {NWL) = 0 Ac-Ft 935.0 (NWL) = 4 Ac-Ft � 946A =` 0.34 944.0 = 3.8 950.0 = 3.34 953.0 = 13.5 953.4 = 8.3 955.8 (HWL) = 19.5 ' 956.0 (HVr�L)_ = 13.24 � _ * 100 - year 24-hour rainfall event � *: 100 - year 10-day rainfali event , ' ' ' ' , '