ITEM 4.1 Feasibilty report for proposed drainage improvementsCITY OF
ot0
MINNE-50TA g
DEPARTMENT INFORMATION
Request for
City Council Action
.. . . . . . . . .
ORIGINATING DEPARTMENT:
REQUESTOR:
MEETING DATE,
Public Works
Ron Wagner,, City Engineer
1-28-13
PRESENTER(s):
REV] EWE D BY'
ITEM #.,
Ron Wagner, City Engineer
Lori Johnson, City Administrator
4.1
AGENDA ITEM DETAILS
RECOMMENDATION:
Staff recommends Council direct staff to compile information received at the informational meeting
from the affected residents. This compiled information can be used by the Council to make an informed
decision regarding going forward with a Public Hearing.
ARE YOU SEEKING APPROVAL OF A CONTRACT?
IS A PUBLIC HEARING REQUIRED?
No
No, this is an Informational meeting with public
input.
BACKGROUND/JUSTIFICATION:
Needham Avenue south of 85th Street has had standing water continue to worsen over the last several
years. A resident requested help from the City to remedy the situation. City Council then authorized
the preparation of a Feasibility Study. An information meeting was presented tonight to the residents
explaining the proposed remedy and the proposed assessment. A Public Hearing for the project with
the potential for assessments in accordance with MN State Statue 444 will need to be scheduled f the
Council determines that the project process should proceed. The schedule outlined in the Feasibility
Report calls for the Council to consider ordering a Public Hearing at the next Council meeting, February
11th. The Public Hearing is proposed to be set for March 11th at 7:00 pm at Prairie Center — Council
Chambers, 8899 Nashua Avenue.
SUPPORTING DOCUMENTS: X ATTACHED ci NONE
0 Feasibility Report
Motion:
No motion is necessary.
or I
13UDGET INFORMATION
211C. -
FUNDING: BUDGETED: Ei YES
N/A N/A ci NO
ACTION TAKEN
u APPROVED AS REQUESTED o DENIED oTABLED o OTHER (List changes)
COMMENTS-
FEASIBILITY REPORT
FOR
PROPOSED DRAINAGE IMPROVEMENTS
NEEDHAM AVENUE — SOUTH OF 85TH STREET
CITY OF TSEGO, MINNESOTA
December 2012
Prepared by:
Halcanson
Anderson
3601 Thurston Avenue
Anoka, MN 55303
Telephone: 763-427-5860
I hereby certify that this plan, specification or report was prepared by me or under my
direct supervision and that I am a duly Licensed Professional Engineer under State of
Minnesota Statutes Sections 326.02 to 326.16.
Ronald J. W#r(er
26052
12/612012
Reg. No. Date
TABLE OF CONTENTS
TITLE SHEET
TABLE OF CONTENTS
1. INTRODUCTION ........................................................ ■..RRRRi...................■.°
1 1 • EXISTING
■ ■ ■o.+ I T I 4.� N ■ ■ r ■ ■ ■ ■ a ■ r ■ ■ Y r ■ ■ t R • i II # f R f J ■ R R R ■ • a ■ ■ a ■ r ■ a ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ r ■ ■ ■ r ■ ■ ■ ■
ill■ PROPOSED PROJECT ............................................................................
I V ■ INITIATION i i . R . R . J . i ■ a . ■ . a a t . t a ■ ■ ■ ■ ■ a ■ ■ . ■ ■ ■ ■ . ■ ■ ■ ... r r ■ ■ ■ ■ ■ .. ■ . r r ■ ■ R a .. i i ■ . . . i . . ■ ... R J a a . .. a ■ ■ .. a ■ a ■ . ■ ■ a ... 2
V. FEASIBILITY .■.a■■■■■■■.■■■■.■■■■■■■■■■■■■■.■..................Ill...a.■aa■■■....■■.■........■......■..... 2
V I ■ RIGHT-OF-WAY EASEMENTS .. ■ ■ ■ ■ .■ . ■ ■ ■ ■ ■ a 2 a ■ ■ ■ ■ ■ ■ ■ ■ . r ■ ■ . ■ ■ ■ ■ ■ '■ a s ■ ■ i . a l R R i i R R R R R . R t a . a . a . ■
VII. PE! \ ITS .. R R R R R .... R . R .. a ■ .. a . ■ . ■ ■ ■ . ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ r r . ■ ■ ■ ■ ■ ■ r ■ r ■ r ■ ■ . ■ s ■ ■ ■ i i i R . ... i R i ■ ■ ■ ■ a a . a ■ ■ ■ ■ ... a . a . ■ ■ r ■ a . ■ ■ 2
1!111. COMPLETION .......................................R...■■..■......■■ttt.■......■■............■■■...■... 2
IX. PRELIMINARY PROJECT SCHEDULE.......■..■a■■■■..■...■....,........................
X. ESTIMATED PR JECT COST ..................................................■■■■■■■■..■■■■■
XI. ESTIMATED ASSESSMENT...... ....................... IL .... L ........ ................. ......
XI 1. CONCLUSION AND RECOMMENDATION ■....■....■■■...■■..1.,.......■.■■■.■■■.■■■■■.
EXHIBITS
LOCATION MAP ■■■■.........r....■.......■...........■.■.■■■.■..■■■■■■■■■■..■■■■■■....■...........A
PROPOSEDST ! k■ Y ■ SEWER ■ . ■ r ■ r r r ■ ■ t ■ ■ ■ ■ ■ . ■ . ■ ■ ■ ■ ■ ■ ■ ■ ■ r ■ ■ '■ ■ . • t i R . R ■ . . R 7 . . t i ■ ■ ■ ■ ■ ■ ■ s ■ ■ ■ ■ ■ ■ ■ r V
BENEFITING PROPERTIES.......... - . ................................ K - - rs......r...ii�
PROPOSED DRAINAGE IMPROVEMENTS
NEEDHAM AVENUE — SOUTH OF 85TH STREET NE
CITY OF TSE O, MN
1, INTRODUCTION
The purpose of this Feasibility Report is to present the City of Otsego with a
preliminary examination of municipal drainage improvements for Needham Avenue in
Otsego, Minnesota (see Exhibit A — Project Location Map). The report discusses the
proposed scope of improvements, preliminary cost estimates and a project schedule.
The report has been prepared in compliance with Minnesota State Statutes 444 for
projects resulting in special assessments for drainage.
Some of the residents along Needham Avenue have contacted the City regarding
drainage issues over the past several years. Due to the number of contacts, City
Council authorized a Feasibility Report be completed to determine costs and potential
funding sources.
11. EXISTING CONDITIONS
The existing right-of-way consists of a bituminous surface (Needham Avenue)
with adjacent drainage ditches and driveway culverts. The existing drainage system
was constructed approximately 20 years ago using private funds without City assistance
but within the City Right of Way. To minimize storm sewer costs, the pipe sizes and
materials were less than City standards. The construction intended for the water to be
conveyed to 85th Street NE via storm sewer and a manhole. The storm sewer was
constructed on the west side of Needham Avenue to convey water north to the
intersection of 85 th Street NE. At the manhole located at the Southwest intersection of
85th Street NE and Needham Avenue, the storm sewer water was directed west through
storm sewer and day -lighted within the 85th Street NE ditch. The 85th Street NE ditch
was replaced with municipal storm sewer during the urban section reconstruction of 85th
Street NE in 2002. However, the storm sewer pipe has failed along Needham Avenue,
causing water to pond within the ditches and onto private property. The existing profile
of the ditch also reveals some flat and reverse grades within the ditch and culvert
system, which is also creating ponding. Some of the property owner existing issues are
septic tanks and drainage fields inundated, mosquitos, stagnant water, rotting
vegetation and loss of usable land.
III. PROPOSED PROJECT
The proposed drainage improvement project consists of a ditch and storm sewer
system along Needham Avenue. The storm sewer would connect to an existing catch
basin at the southwest corner of 85th Street NE and Needham Avenue (see Exhibit B).
To convey the water to the proposed storm sewer, re -grading of the ditch and replacing
the driveway cuiverts would be required. The transverse culvert would increase from an
18" to a 24". The water would flow north along the east side of Needham Avenue until It
crosses Needham Avenue through the 24" culvert. The water would continue to drain
north along the east side of Needham Avenue until it reaches the proposed storm
sewer, which would be increased in size from 10" to 15", and finally the existing storm
sewer at 85th Street NE. The material proposed for the storm sewer pipe is either
HDPE or Reinforced Concrete.
Iv® INITIATION
The feasibility report was initiated by the City Council due to issues regarding
water ponding.
V. FEASIBILITY
The project is feasible from a technical standpoint and generally meets all local,
regional and stag standards for municipal improvements.
vi. RIGHT-OF-WAY I EASEMENTS
The existing streets and proposed ditch upgrades are located within the existing
66 foot wide right-of-way. If additional utility and drainage easements are required
based on the final design, these permanent and temporary easements will need to be
provided to the City of Otsego.
v11. PERMITS
At this time, no permits are required for this project.
VIII. COMPLETION
This project is proposed to be completed during the 2013 construction season.
IX. PRELIMINARY PROJECT SCHEDULE_
The preliminary project schedule for the drainage improvements for Needham
Avenue:
Table I
City of Otsego
Needham Avenue
Preliminary Project Schedule
2012 2013
1. City Council Receives Feasibility Report
December 10
and Schedules Information Meeting
2. Mail Individual Notices for Informational
January 18*
Meeting
3. Publish Notice of Informational Meeting
January 19*
4. City Council Holds Informational Meeting
January 28
5. City Council Orders Public Hearing or
February 11
Discontinues Process
6. Publish Notice for Public Hearing
February 16 & 23*
7. Mail Individual Notices for Public Hearing
February 18*
8. City Council Holds Public Hearing
March 11
9. City Council Orders Project, and
Authorizes Engineer to Prepare Plans
March 25*
and Specifications
10. Engineer Submits Plans for City Council
Approval and Receives Authorization to
April 8*
Advertise for bid
11. City Council Receives Bid and Awards
May 13*
Contract or Discontinues Process
Contractor Begins Construction
June*
13. Contractor Completes Construction
July*
14. Assessment Hearing and Approval of
Septernber*
Assessment Roll
3
* Adjusted dates.
X. ESTIMATED PROJECT COST
Included in this report is a detailed estimate of construction costs for the drainage
improvements. The costs quoted herein are estimates only and are not guaranteed
prices. The quantities are estimates also. The contractor will be paid only for work
completed. The cost estimates are based on previous projects costs.
The estimated costs for the drainage improvements for Needham Avenue are as
follows:
Table III
City of Otsego
Needham Avenue
Preliminary Cost Estimate
Mir] Q&%helffillel "All - nifnk
Item
No.
Description
Estimated
Qua it
Unit Price
Extension
1
Mobilization
I LS
$1,500.00
$1,500
2
Common Excavation (P)
140 Cly'
$12.00
$1,680
3
Remove Culverts
268 LF
$6.00
$2,144
4
TratFo Control
1 LS
$1,000.00
$1,000
5
Salvage and Reinstall Street Sign
2 EACH
$50.00
$100
6
Seeding - Type Lawn Restoration
0.4 ACRE
$2,500.00
$1$000
7
Commercial Fertilizer, 10-10-10
160 LBS
$1.00
$160
8
Mulch Material Type 1
0.30 TON
$450-00
$135
Total - Bid Schedule FIXI
Rid Qi-harfida "Fill - qfnrm Nawar
$7,719
It m
No.
Description
Estimated
Quentity
Unit Price
Extension
9
Remove EAsting PVC Pipe
438
LF
$4.00
$15752
10
Catch Basin
I
EACH
$1,500-00
$1500
11
24" RC Pipe Apron
2
EACH
$600.00
$1,20
12
.1510 RC Pipe Apron
7
EACH
$500.00
$3,500
13
12" RC Pipe Apron
2
EACH
$300.00
$600
14
15" RC Pipe Sewer Design 3006 CL III all depths)
472
LF
$30.00
$14,160
15
24" RC Pipe Sewer Design 3006 CL IH all depths)
32
LF
$35.00
$1120
16
12" RC Pipe Sewer Design 3006 CL III all depths)
24
LF
$27.00
$648
17
Connect to EAstin g Storm Sewer
i
EACH
$500.00
$500
Total - Bid Schedule 11 BF1
4
$24,980
Total - Bid Schedules "N' & 111311 $329699
Overhead & Contingency (351'16) $113446
Total Project Cost- $445144
X1. ESTIMATED ASSESSMENT
The estimated assessment was determined by the contributing area (see Exhibit
C). Each contributing area was adjusted using the Soil Conservation Service (SCS)
curve numbers and an affected area multiplier. The SCS curve numbers incorporate
land use and hydrologic soil groups. Properties were also weighed based on the
likelihood of water ponding on the property. Properties with water likely to pond on the
property were given a factor of 1.5 while properties with water likely to pond in the ditch
in front of the property were given a factor of 1.25. If no water was likely to pond on the
property a multiplier of 1 was set. The elevation used to determine likely ponding was
942 feet. A weighted average was then determined and used to determine the
appropriate assessment. The estimated cost per assessment is summarized in Table 111.
The assessment portion of the project is 100% of the total estimated project costs.
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X11. CONCLUSION AND RECOMMENDATION
This report analyzed the feasibility of drainage improvements for Needham
Avenue south of 85th Street E. The improvement is technically feasible as described
in this report. The project is proposed to be funded solely by the benefiting properties.
7
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PROPOSED ASSESSED PROPERTIES
LEGEND
PROPOSED ASSESSED PROPERTY
kanson
Anderson
09, 2013 1 1; .3 -own SCALE 1N FEET
K- \c o-J—ef. 2\PR CIJEC TS\V0' 4: PA L\O TO 5\c! �\O 105 F E jkS d. )
EXHIBIT G
OT435
T NJ
1
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(12
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LEGEND
PROPOSED ASSESSED PROPERTY
kanson
Anderson
09, 2013 1 1; .3 -own SCALE 1N FEET
K- \c o-J—ef. 2\PR CIJEC TS\V0' 4: PA L\O TO 5\c! �\O 105 F E jkS d. )
EXHIBIT G
OT435