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HomeMy WebLinkAbout9C - CR 21 Watermain Project <. P Rl to' 0.\'.\ 4646 Dakota Street S.E. U ~) Prior Lake, MN 55372-1714 :/ ~lNNESO't~// CITY COUNCIL AGENDA REPORT AGENDA ITEM: JULY 20, 2009 9C STEVE ALBRECHT, DIRECTOR OF PUBLIC WORKS CONSIDER APPROVAL OF A RESOLUTION AUTHORIZING PREPARATION OF PLANS AND SPECIFICATIONS FOR CR 21 WATERMAIN PROJECT MEETING DATE: AGENDA #: PREPARED BY: DISCUSSION: Introduction The purpose of this agenda item is for the City Council to authorize preparation of plans and specifications for CR 21 Watermain Project. Histol"{ As the City Council is aware, during the week of February 1 sl the City shut down CR 21 for a period of three days to complete repairs to the 24-inch diameter watermain located in CR 21 between Eau Claire Trail and Wagon Bridge Circle. In 2007 the City completed a large repair to this watermain just east of the Wagon Bridge. The total cost of repairs for these two events will most likely exceed $100,000. The 24-inch main is the City's largest watermain and provides one of three east! west connections from the east to west side of Prior Lake. The watermain is ductile iron and was constructed in the late 70s. Under normal conditions this main would be expected to have a 50+ year life. It is currently about 30 years old. This main is especially important during high water use periods and large fire events. During the 2007 incident it was determined that a large rock placed during construction of the bridge or roadway most likely created the hole in the main. Over time the vibration of this rock against the pipe created a weak spot that eventually failed. However an inspection of the pipe during the repair did not indicate any other unusual wear on the pipe. The repairs in 2009 revealed that the bottom side of the watermain was corroded and failed due to vibration of small rocks near corroded areas. The corrosion was most likely due to acidic soils in the area that over time reacted with the ductile pipe and decayed the underside. In 2007 part of CR 21 was reconstructed over a portion of the watermain. The pipe was insulated during that project and no corrosion was noted on the top side of the pipe. This is consistent with the repair findings. Based on City observation, it appears that the cold winter with deep frost conditions of more than five feet in the roadway may have also contributed to the failure. While the pipe did not freeze, the frost reached to the insulation layer and created a connection transferring vibrations from the roadway to the pipe and causing small stones to penetrate the corroded sections of pipe. A total of three areas were repaired during this latest episode. www.cityofpriorlake.com Phone 952.447.9800 / Fax 952.447.4245 On June 15, 2009 the City Council accepted the feasibility study for the project and authorized Staff to pursue relocation of the watermain to the northern boulevard of CR 21 utilizing directional drilling. SRF was authorized to proceed with easement acquisition on the City's behalf. Current Circumstances SRF has already obtained right of entries from 2 of the 3 property owners and has indicated the remaining property owner is supportive of the project but wants additional information prior to providing a right of entry. Based on the status of acquisition Staff believes the City should begin preparation of the plans and specifications for the project. Staff has solicited quotes for professional design services for the project from SRF, AE2S and Bolton & Menk. SRF notified the City that they would not be providing a quote as they did not have staff available to complete the work in accordance with the City's schedule. The City did receive quotes from Bolton & Menk and AE2S in the amounts of $39,412 and $31,750 respectively. Based on the cost and project experience City Staff recommends award of the City's Standardized Professional services contract to AE2S for the CR 21 Watermain Project. ISSUES: In order to allow adequate time for construction this fall it is important to proceed with design of the project. The following project schedule is necessary in order to ensure completion before weather inhibits construction and restoration of the CR 21. - City Council Approves Plans & Specifications Authorizes Advertisement for Bids.................... . August 17,2009 - City Council Awards Bid...... ............ ... ... ............ .....September 21,2009 - Project Completed.................................... ... ... ..... ...December, 2009 The City does not currently have staff available to design the project and does not have the in-house expertise to complete the directional drilling design. For these reasons Staff is recommending contracting with AE2S to complete the design and assist with construction administration. FINANCIAL IMPACT: The proposed design and construction services costs are less than 5% of the estimated project construction cost. This is a very good value for this amount of work. The funding for this project is available and will come from the Water Utility Fund. ALTERNATIVES: 1. Approve a resolution authorizing preparation of the plans and specifications for the CR 21 Watermain Replacement Project. 2. Table the Resolution for a specific reason. 3. Deny the Resolution. RECOMMENDED Alternative # 1 MOTION: ~o~ PRI01> \ [... ~ \ 4646 Dakota Street S.E. U ~ Prior Lake, MN 55372,1714 ~lNNESO't~// RESOLUTION 09-XXX RESOLUTION AUTHORIZING PREPARATION OF PLANS AND SPECIFICATIONS FOR THE CR 21 WATERMAIN PROJECT Motion By: Second By: WHEREAS, The CR 21 watermain between Eau Claire Trail and Quincy Street is an important piece of the City's water infrastructure; and WHEREAS, Breaks occurring this past winter revealed that if left unrepaired the watermain will most likely continue to fail annually at considerable cost to the City; and, WHEREAS, On June 15, 2009 the City Council accepted the feasibility study for the project and authorized Staff to pursue relocation of the watermain to the northern boulevard of CR 21 utilizing directional drilling. SRF was authorized to proceed with easement acquisition on the City's behalf; and WHEREAS, In order to complete the project this fall the City needs to begin design of the project; and WHEREAS, The City does not have in-house staff or expertise for design of a directional drilling project and solicited quotes from the City's Professional Services Pool; and WHEREAS, The low quote was provided by AE2S in the amount of $31,750; and WHEREAS, AE2S has the experience and expertise to complete the project. NOW THEREFORE, BE IT HEREBY RESOLVED BY THE CITY COUNCIL OF PRIOR LAKE, MINNESOTA as follows: 1. The recitals set forth above are incorporated herein. 2. The Mayor and City Manager are authorized to execute the City's Standardized Professional Services contract with AE2S for an amount not to exceed $31,750 for design and construction services. 3. Funding for these services shall come from account # 601-49400. PASSED AND ADOPTED THIS 20th DAY OF JULY 2009. YES NO I Haugen I Erickson I Hedberg I LeMair I Millar Haugen Erickson Hedberg LeMair Millar Frank Boyles, City Manager www.cityofpriorlake.com Phone 952.447.9800 / Fax 952.447.4245