Loading...
ITEM 3I-rJE To Honorable Mayor and City Council BY: Ronald J. Wagner, P.E., City Engineer CC: Lori Johnson, City Adininistrator- Tini Luff, City Clerl Dan Licht, City Planner Gary Gr#oen, City Finance Director ctor Doss l emarrt, ParIc and Recreation tion 'I nager DATE. March 1 , 2013 RE: Corupr,eliensiv Project Costs - Soccer Fields more comprehensive project analysis than was provided in the 2013 CIS' was requested y Parks n Recreation Manager Foss Demant to present to City staff and the City Council to gain authorization to begin design of plan and specifications for the Otsego Soccer Fields project. The project is planned to be split into several components as to have expert contractors in charge of each element rather than have one general contractor with many subs. Each phase of the project will have definitive time lines. Currently the 011ly issUe with the timeline is completing a survey of the property to determine the actual amount of soil that needs to be moved. The survey reeds to be completed while the ground is still frozen. April and May can he challenging t survey ars open fields due to muddy conditions. The construction of project is plaimed to be split into smaller phases: 1 Grading of the soccer fields — Early June 2) Installation of power by Wright Hei epin — Late Jure 3) Pond lining, grading of parking lots and installation of pipe from the Public Works Building to a manhole and installation of wet well — Late June 4) Installation of street lights - July 5) Installation of well VFD and appurtenances - July 6 Installation of booster station and irrigation system - July 7) Turf establishment — August Phase 1 - Soccer Fiala Grading ot720 - mento - soccer fields -7 PPage I of Currently, we are estimating $108,750 in construction costs for grading of the playfield area. This cost estimate is still a very rough guess without completing a survey and coring for depth of existing topsoil and will be fine-tuned during the grading design, which requires City Council approval to proceed with Plans and Specifications. Phase 2 - Installation of Electric Service Wright Hennepin has provided the City with a cost estinate of $2,125 for placing a transformer to supply power for the water system, irrigation and parking lot lighting. City staff also directed that Wright Hennepin consider Riture power needs for lighting of the soccer fields so that the capacity would be in place if such improvements are to be made in the future. Phase 3 —Pipe From Well to Pond/Pond Lining/Parking Lot Grading City staff is recommending a single contractor perform three elements of the project having an estimated total cost for construction of $49,500 (including mobilization costs for all three components): Installation of water pipe from the Public Works Building to the existing stormwater drainage manhole adjacent to the salt storage shed and the installation of pipe and wet well adjacent to the existing storm water pond, The piping and wet well is estimated to cost $20,000. This includes removal and replacement of some asphalt from the building to the manhole adj aceta to the salt storage shed. Lining of the storniwater pond to retain water for storage from elevation 910 down to the bottom at elevation 904 is estimated to cost $15,000 to construct. The cost of this project component may change some dependent -upon which method of lining is. Our office will be researching the effectiveness and cost of several methods including a PVC liner, bentonite clay or use of existing stockpiled clay. Once we have researched each of these methods and the cost associated with them a recommendation will be forwarded to the council for approval as part of the Plans and Specifications. Class 5 installation and grading of the parking lots is estimated to cost $14,000. The design will incorporate the opportunity to add additional parking to the east of the north -south drive aisle as well as pavement, curb and I gutter and storm sewer in the future. Two gates will also be installed at the site entrance from 90" Street and north end of the parking area to control access for security purposes. Phase 4 — Installation of Street Lights Street lights are proposed to be located at the entrance from 90t" Street and within the parking areas primarily for security reasons, Wright Hennepin has provided us with a cost estimate of $13,825 for seven light fixtures/poles of the same type installed in the parking area east of City Hall. City staff will work with Wright Heimepin to determine if adequate lighting can be provided with fewer fixtures. Phase 5 - Installation of Well VFD and Appurtenances ot720 - nienio - soccer fields—TPC Page 2 of 3 The test of the existing Public Works Building well has determined there is an adequate supply of water sand free at a 100 gpm rate but controls, transducers, floats, RPZ and a VFD need to be installed to allow dual usage of the well. These costs are very fluid still until more design is completed but will require cutting into the concrete floor of the Public Works Building to gain access to the control room based oil the system designed by the architect, A rough estimate for construction is $37,500. Phase 6 - Booster Station and Irrigation System The construction costs of supplying and installing the entire irrigation system from the wet well next to the pond to the soccer fields is estimated at $65,000. Plans and specifications for this phase will be provided primarily by the selected irrigation contractor subject to review and approval by the City Engineer. Phase 7 — Turf Establishment Parks and Recreation Manager Derrant has been in contact with a service professional who specializes in athletic field turf, This turf specialist has estimated the cost for seeding and initial fertilization during the first year to be $25,000. Phase 8 — Engineering, Administration and Contingency We estimate fees froin our office related to preparation of plans and specifications, surveying, and construction oversight and completing as -built plans to be $23,300. The project estimate included with the CIP included a 20 percent contingency some of which was to account for engineering and administration costs that have been more specifically defined as separate line items ill tills current estimate. Having refined the preliminary cost estimates for the project as outlined herein., City staff has reduced the contingency to ten percent or $30,000. sinninal-Y The current estimate for the cost of project as outlined herein is $355,000, which is an increase of $12,700 from the amount that was presented as part of the CIP. The cost increase is due to the following: Although the existing Public Works Building well does not require additional development to be able to provide water to the soccer field irrigation that was included in the initial estiniate, additional work to access the well controls and make a connection to the water system for a dual system that both supplies the Public Works building and the irrigation system are higher than anticipated. Use of the specialized professional for seeding as well as consultation on the development of the tUrf is estimated to cost $10,000. 0 Gates were added to secure the proposed parking lot adding $2,000 to the project cost. ot720 - nienio - soccer fields—TPC Page 3 of 3 Phase I Early June Grading of the Soccer Fields Estimated Cost Item Quantity Units Unit Cost Cost Mobilization 1 LS $21000.00 $2,000-00 Silt Fence ' 3500 LF $2.00 $7,000.00 Strip Topsoil 18000 CY $2.00 $36,000-00 Grading 8500 CY $1.50 $12,,750-00 Respread Topsoil 18000 CY $2.75 $49..500,00 Tree Removal 1 LS $1.,500-00 $1,500.00 $x.08,750.00 Phase 2 Late June Installation of Power Estimated Cost Item Quantity Units Unit Cost Cost installation of Transformer 1 LS $2)125-00 $2,125.00 $2,125,00 Cl 5 Parking Lot,, Pond Lining, Wet Well Phase 3 Late June and Piping Estimated Cost Item Quantity Units Unit Cost Cost Mobilization I LS $2.,500-00 $2,500.00 CL 5 Parking Lot 800 TON $15'.00 $12.,000.00 Pond Lining 500 CY $30-00 $15,000.00 Wet Well I LS $2p50O.00 $2)500.00 Piping from PW Building to MH I LS $17,500.00 $17.,500-00 Gates 2 Each $1,000.00 $20000-00 $49.,500.00 Phase 4 July Installation of Lighting for Parking Lot Estimated Cost Item Quantity Units Unit Cost Cost Street Lights (7) 1 LS $13;825.00 $13,825.00 $13,825.00 Phase 5 July Installation of VFD and Appurtenances Estimated Cost Item Quantity Units Unit Cost Cost VFD other Control Items 1 LS $37,500-00 $37j500-00 $37,500-00 Phase 6 Estimated Cost Item Irriagation System Booster Station Phase 7 Estimated Cost Item Seeding Denudation - (round -Up) 2x Turf Establishment (1st Year) Phase 8 Estimated Cost Item Contingency Construction and Design As -Built Survey, Design, Admin. & Construction SW Summary Estimated Cost Iterin Phase 1 - Grading Phase 2 -Electric Service Phase 3 - Piping/Wet Well/Pond Lining /Parking Lot Phase 4 - Street Lights Phase 5 - Well Controls Phase 6 - Booster Station / Irrigation Sfirst e rn Phase 7 - Turf Phase 8 - Design/ Admin/ and Contingency CIP Amount July Quantity August Installation of Booster Station and Irrigation System Units Unit Cost Cost LS $45,r000-00 $45,000,00 LS $20,0+0.0 $20,000.00 $65,000.00 Turf Quantity Units 10 Acre 2 LS 1 LS Unit Cost Cost $11250.00 $12,500.00 $1,250.00 $2,500.00 $101000.00 $10,000.00 $25,000.00 Design, Admin and Conti gency of 10% Quantity Units Unit Cost Cost I LS $30j000.00 $30,000.00 LS $51000.00 $50000.00 1 LS $18,300-00 $18,300.00 $53y300-00 Summer 2013 Soccer Fields Cost $108j750.00 $21125.00 $491500.00 $13o825.00 $37,500.00 $65,000-00 $2,5,00{x.00 $301,700.00 $53,300-00 $355,000-00 $342,F30O,OO $12,700.00 Over 33%