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Home My WebLink AboutItem 15 - Creeks 17 & 23ITEM * /!57 MEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL FROM: ROGER NELSON, CITY MANAGER&/f/ MEETING DATE: OCTOBER 17, 2000 SUBJECT: AMENDMENTS 5 & 6 / CREEKS 17 & 23 DESIGN CONTRACT RECOMMENDATION: City Council consider approving Amendments No. 5 and 6 to the Creeks 17 & 23 Design Contract with Freese and Nichols, Inc. in the "not to exceed" amounts of $5,200.00 and $30,350.00, respectively, for additional engineering services relative to the development of the final plans for the Creeks 17 & 23 Channel Improvements project, authorize staff to execute said Amendments and take any necessary action. FUNDING SOURCE: Funds are available in the following accounts: Funding Source Account Amount Award Percent 94 GO Bonds178-78324-007 $ 373,830.48 7.8% 96 GO Bonds 178-78355-009 $ 32,169.52 .7% Peripheral Fees 178-21407 $ 1,892.77 .1 Stormwater Drainage Utility Funds 116-48941-535-1 $ 160,710.00 $35,550.00 3.4% Future Stormwater Bonds $4.203.700.00 88.0% TOTAL $4,772,302.77 $35,550.00 Bu—. diet Amount Award Percent Engineering $ 556,410.00 $35,550.00 11.7% Construction $ 3,695,922.53 77.4% Permit $ 18,077.47 0.4% Contingency $ 501.892.77 0.5% TOTAL $4,772,302.77 $35,550.00 BACKGROUND: During the development of the Creeks 17 & 23 project, residents along the creek have raised a number of questions in both individual and public meetings. As a result of residents' questions, a bio -engineer was hired, and an investigation of trench safety and construction techniques was completed. The bio -engineer provided recommendations \\CHOP\DATA\C ITYW I DE W GENDA\10-17-00\amend.creek 1723.design.contract.doc October 12, 2000 (5:09PM) relative to residents' concerns, such as gabions and vegetative slope stabilization, which are now being made part of the plans. The questions regarding trench safety and construction techniques were answered by a specialist during the last set of public meetings. The contract amendments reflect the retention of the additional consulting services described above and also include the changes to the construction plans related to the residents' questions. Staff plans to advertise the project for bid in November. Staff recommends approval. \\CHU P\DATA\CITYWIDE\AGENDA110-17-00\amend.creek 1723.design.contract.doc October 12, 2000 (5:09PM) VO ENGINEERING SERVICES CONTRACT CHANGE AUTHORIZATION NO. 5 Client: City of Grapevine F&N Project No.: GPV94248 Mr. Stan Laster P.E. Client Contract Ref.: P.O. Box 95104 Grapevine TX 76099 Date: July 5, 2000 Project Description: Special Services - Creek 23 & 17 Channel Improvements Description of Services Added/Deleted: The work to be added includes a review of the project by Charles Jackson, P.E. of Rone Engineers to evaluate potential OSHA trench safety concerns, including his attendance at one working meeting and at all three Third Public Meetings. The work also includes additional effort by F&N staff to coordinate the subconsultants. Deliverables: Attendance by Charles Jackson, P.E., at one working meeting and all three Third Public Meetings Compensation shall be adjusted as follows: As described in the attached Scope of Services, the additional effort for the trench safety review by Rone Engineers consists of $2,000 of labor and $100 of expenses, and the additional effort by F&N staff to coordinate the subconsultants consists of $3,100, for a total increase not to exceed $5,200, and shall be billed on an hourly basis. Original Contract (including CM#4) $222,210.00 Revised Total Contract $227,410.00 Schedule shall be adjusted as follows: In order to meet the proposed schedule for the public meetings in July 2000, work on the OSHA trench safety review shall start immediately after the date of this modification. The above described services shall proceed upon return of this Contract Change Authorization. Services will be billed as they are done. All other provisions, terms, and conditions of the agreement for services which are not expressly amended shall remain in full force and effect. O l� A contract modification will be submitted. This Contract Change Authorization will serve as contract modification. CLIENT: B LE: D' ector of Public Works DATE: July 11, 2000 FREESE AND NICHOLS, INC.: TITLE: DATE: � /? DISTRIBUTION: PM, GROUP MGR., DISC. LDR., OPER. ANAL., CONTRACT ADMIN 4055 INTERNATIONAL PLAZA, SUITE 200 • FORT WORTH, TEXAS 76109-4895 • TELEPHONE: 817-735-7300 ® METRO: 817.429-1900 • FAX: 817-735.7491 till 1 1 LrC(1 (U'\FORMS\CONCHG.FRMj 02196 ra FREESE- NICHCt LS ENGINEERING SERVICES CONTRACT CHANGE AUTHORIZATION NO.6 Client: _ City of Grapevine Mr. Stan Laster, P.E. F&N Project No.: GPV95087 P.O. Box 95104 Client Contract Ref.: Grapevine, TX 76099 Date: August 10, 2000 Project Description: Creek 23 & 17 Channel Improvements Description of Services Added/Deleted: The work includes the modification of the plans and specifications to reflect the changes made during the recent public meeting process as described in the attached list of general and specific changes to the project, as well as additional review comments received from City staff. The work also includes the design of bioengineering erosion protection along the outside bank of the oxbows on Upper Creek 23 and Creek 17, along with Robbin Sotir's review of the bioengineering design and specifications. Deliverables: An updated set of plans and specifications for the City to bid the project. Compensation shall be adjusted as follows: The additional effort consists of $21,450 of labor and $2,500 of expenses, and the review of the bioengineering design by Robbin Sotir and Associates consists of $6,400, for a total increase not to exceed $30,350, and shall be billed on an hourly basis. Original Basic Services Contract (with CM#1) $288,100.00 Revised Total Basic Services Contract $318,450.00 Schedule shall be adjusted as follows: The modifications to the plans shall be completed within 60 days of the date of this agreement. The above described services shall proceed upon return of this Contract Change Authorization. Services will be billed as they are done. All other provisions, terms, and conditions of the agreement for services which are not expressly amended shall remain in full force and effect. O A contract modification will be submitted. C�r This Contract Change Authorization will serve as contract modification. FREESE AND,NIICHOOLS, INC.: p+ TITLE:V: c (- /�� tJ.'04 ",'/ DATE: Y/i" I°" CLIENT: DISTRIBUTION: PM, GROUP MGR., DISC, LDR., BY: TITLE: DATE: OPER. ANAL., CONTRACT ADMIN. 4055 INTERNATIONAL PLAZA, SUITE 2001 FORT WORTH, TEXAS 76109-48961 TELEPHONE: 817-735-7300 I METRO: 817-429-1900 I FAX: 817-735-7491 [UAFORMSICONCHG.FRM) 0296 Creeks 17 and 23 Stormwater Channelization Project Design and Construction of the Channel Improvements to Creeks 17 and 23. These two locations have been identified as the highest priority projects to address existing capacity and future capacity problems that could result in flooding of private property. U men.ali talle 11 M MEDWIrel Design Mar -95 Nov -00 Construction Jan -01 Jun -02 FISCAL IMPACT Cleaning of these areas would be dependent upon need. Projected Annual Operating Impact FY -2001 FY --2002 FY -2003 FY -2004 IFY 2005 Bud et "Planned Planned Planned. Planned Total Personnel Expenses 0 Total Project LTD Budget Planned Project Expenses 09130/00 FY -2001 FY -2002 FY -2003 FY -2004 FY -2005 ' Cost Design 481,210 75,200 556,410 Construction 2,646,423 1,049,500 3,695,923 Permit 18,077 18,077 Contingency 501,893 501,893 TOTAL: $481,210 $2,739,700 $1,551,393 $0 $0 $0 $4,772,303 Funding Source 373,830 373,830 1994 GO Bonds Future Stormwater Utility Bonds 2,652,307 1,551,393 4,203,700 1996 GO Bonds 32,170 32,170 SDUS Interest 75,210 85,500 160,710 Peripheral Fees 1 1,8931,893 TOTAL: $481,210 1 $2,739,700 $1,551,393 $0 $0 $0 1 $4,772,303 Cleaning of these areas would be dependent upon need. Projected Annual Operating Impact FY -2001 FY --2002 FY -2003 FY -2004 IFY 2005 Bud et "Planned Planned Planned. Planned Total Personnel Expenses 0 Supplies 0 Maintenance 0 Services 0 ,Capital Outlay 0 Total $0 $0 40 $0 "S0 $0 ■ City of Grapevine - Creeks 23 & 17 Channel Improvements List of General Changes to the Project • Charged Lower Creek 23 channel walls to use modular block for upper 4 feet of walls • " Changed Creek 17 channel walls to modular block • Using a stamped rock pattern in the concrete channel bottom • Changed decorative chain link fence along Lower Creek 23 to welded pipe rail • Deleted the maintenance access ramp at Creekwood Drive • Will hire a tree specialist during construction to minimize impacts on existing trees • Will add nesting boxes in mature trees • Will plant clumps of berry -producing shrubs occasionally along the overbanks • Will use bioengineering in oxbow areas and several overbank areas List of Specific Changes to the Project Address Creek Stream Station Descri tion of Change 2812 Rosecliff Terrace 23 5+00 Won't extend 18" storm drain, will lower channel wall and construct open channel with inlet to channel, may use overbank walls to hel save trees 2819 Springhill 23 5+70 Relocate aerial crossing support column 2810 Creekwood 23 6+00 Review the grading around several trees 2829 Greenbrook 23 8+00 Review the grading at the top of the slopes to save the trees, especially large ost oak next to driveway 2818 Creekwood 23 9+50 to 10+25 Raise the left channel wall .to flatten the slope and protect the deck supports, add area drain to intercept runoff from drives 2820 Creekwood 23 10+25 to 11+00 Raise the left channel wall to flatten out slope, try to keep 2 big trees below the existing retaining wall 2822 Creekwood 23 11+00 to 11+75 Raise the left channel wall to flatten slope 2824 Creekwood 23 12+50 Be sure and connect the french drain to the channel wall 2826 Creekwood 23 12+70 to 13+50 Raise the left channel wall, be sure to connect drain pipe to channel wall, look at using area drain grate for flow off driveways Address Creek Stream Station Description of Change 2917 Timberline 23 13+00 to 14+00 Save as many trees on the ridge line as possible 2718 Twin Creek 23/17 14+80 Add grading a small drainage ditch along Cove the sanitary sewer easement, with an inlet 2722 Twin Creek to the channel Cove 2830 Creekwood 23 15+00 Add an overbank wall to save some of the trees around the deck 2832 Creekwood 23 15+80 to 16+10 Extend overbank wall to protect driveway 2714 Twin Creek 23 16+60 Add an overbank wall to save several Cove trees 2836 Creekwood 23 17+40 Be careful of trees and new retaining wall along driveway 2710 Twin Creek 23 18+00 to 19+00 Possibly use bioengineering on left bank Cove of channel 2712 Creekwood 23 23+00 to 23+50 Review grading to make sure we save the trees we are showing we will save 3002 Old Mill Run 23 23+10 to 23+90 Remove the overbank wall to save trees along bank 300.4 Old Mill Run 23 24+40 Add an inlet on the right channel wall to et local runoff into the channel 3006 Old Mil Run 23 25+20 Protect tree near telephone pole, be careful around the sprinkler system, remove drop TXU pole if possible 3012 Old Mill Run 23 28+70 to 29+80 Modify bottom of flood overflow channel to concrete so that maintenance vehicles can drive over it 3012 Old Mill Run 23 29+60 Increase right overbank wall height to save trees 2722 Twin Creek 17 2+00 to 2+90 Keep the top railroad tie retaining wall Cove 2521 Bearhaven 17 7+00 Revise grading of fill area in left overbank to save trees, possibly extend the overbank wall to help, show and protect large tree 3014 Oak Forest 17 5+00 to 5+50 Modify location and height of overbank wall to avoid disturbing fence and trees 3010 Oak Forest 17 7+50 Stabilize creek bed below existing railroad tie wall with rock rira 2510 Briarwood 17 8+00 Use bioengineering to stabilize the slope of the outside bank of the low flow channel, with limited grading on the inside bank. �okG �o TREWS Tb BE RVcD I m 9 K4 m Y C) MA uj OD - I -' r CL m zo < S6(5 < LJ Li 1:'- 0% ui C�z m L = Wj < C) 0 9: cr. < � X Uj 00 V) 0 U) Crj- :2 U.J L'i Z C14 Z ooj/�-� 0 m 0 . &Z z C7 —Z co -S Q Ln LL- < 4:3 Lu I m 9 K4 m Y C) MA uj OD - I -' r CL m zo < S6(5 < LJ Li 1:'- 0% ui C�z m L = Wj < C) 0 9: cr. < � X Uj 00 V) 0 U) Crj- :2 U.J L'i Z C14 Z ooj/�-� 0 m 0 . &Z z C7