[From the U.S. Government Printing Office, www.gpo.gov]












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                                                                                                                                                                                                                                 Attachmelat #95.4.3



                                                                                                               Pedestrian Bridge
                                                                                                                                                           at the
                                                                                                          Cochecho Riverwalk



                                                                                                                                                         July 12,1996























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                                                                                                                                                                deaiVfitIpg2.sam














                                           TABLE OF CONTENTS



                                                       Narrative

                                                  Project Summary

                                                         Photos
                                              Selected Press Coverage
                                                   Interim Reports
                                              Engineering Documents







                  N









                  This project was funded in part by a grant from the Office of State Planning, New
                  Hampshire Coastal Program, as authorized by the National Oceanic and Atinospheric
                  Administration (NOAA), Grant Award Number NA570ZO320.




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                                       Narrative


            The City of Dover received a NH Coastal Grant to build a pedestrian
            bridge over the Cochecho River. The grant amount of $50,000 was
            matched by funds from the City of Dover.


            The original plan to accomplish the project entailed writing a Request
            for Proposals using a design/build concept. The successful bidder would
            design and construct the bridge. While many companies attended the
            required pre-bid meeting, we received only one proposal for the project
            at$281,000. This price was approximately $100,000 more than our
            budget.



            Our strategy had to be revised at this juncture. We realized that to have
            any chance at completing the project successfully, we would have to
            take a more active role. We decided to hire an engineering firm
            experienced in bridge design to determine the most cost effective
            solution, design the preferred alternative, prepare an RFP for the
            manufacturing of the structure, prepare an RFP for the installation of the
            bridge, and finally, oversee the installation of the bridge as the City of
            Dover's resident engineer.







           The preliminary analysis showed that a wooden truss superstructure
           capable of supporting the weight of siding and a roof could be
           manufactured and delivered to the site for less than $ 100,000. The
           installation was estimated at approximately $80,000. Requests for
           Proposals resulted in a bridge for $94,500 and the installation for
           $60,000 with options to cover the bridge with siding and a roof between
           $21,068 and $23,628 depending on the roofing material used. The bids
           were awarded to HEB'Engineers of North Conway, NH, Chicks
           Industrial of Madison, NH and Moores Marine of Dover, NH.



           The bridge was delivered to the site by Chick Industrial the first week of
           April, and subsequently erected then floated into place by Moore's
           Marine on June 1 st. The bridge was opened June 7th for use by
           pedestrians and completed on June 28th.















           dean/bridglsam




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                              Project Summary

           The following is a list of events which summarizes the pedestrian bridge
           project.
           1. Prepare RFP for design/build of pedestrian bridge
           2. Reject only bid as it was $100,000 over budget
           3. Prepare RFP for engineering services to:
                a) Analyze various bridge alternatives
                b) Analyze existing abutments and make recommendations
                c) Design preferred alternative bridge and prepare RFP for
                  manufacture of bridge superstructure
                d) Prepare RFP for installation of bridge and associated site work
                e) Oversee installation of bridge as City of Dover's representative
           4. Award engineering services to HEB Engineers of North Conway,

               NH

           5. Review report of HEB which summarized various bridge
               superstructures with preliminary cost estimates and selected a
               preferred alternative which met our budget
           6. Engineering consultant prepared RFP for the manufacture and
              delivery of bridge superstructure
           7. Awarded manufacture of bridge to Chicks Industrial of Madison, NH








           8. Engineering consultant prepared RFP for the erection and installation
                of bridge
           9. Moore's Marine of Dover, NH was awarded the bid to install the

                bridge
           10. The cost of siding and roofing the bridge was $5,000 over budget
           11. Applied and received a NH Coastal Program Grant to cover and side
                the pedestrian bridge
           12.  Received donation from Advanced Systems in Measurement and
                Evaluation, Inc., to pay for difference between the cost of asphalt
                and wood roof shingles
           13.  Chick Industrial delivered the bridge to the site the first week of
                April.
           14.  Moore's Marine erected bridge to 80% completion on land
           15.  Moore's Marine craned bridge onto barges and flO-'- ated into place

                june I st

           16.  Bridge opened to pedestrian traffic June 7th
           17.  Bridge completed on June 28th




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                                     Building bridges
                                                     
                                     Dover pedestrian
                                     walkway set to be
                                     done by March                        
                                                                                                                              
                                           By - DAN TUOHY
                                        Democrat Staff Writer
                                     DOVER  -  The long-awaited
                                  pedestrian bridge over the Co-
                                                 
                                  checo River is nearing comple-
                                                  
                                  tion and is expected to be
                                  
                                  erected by early March.
                                     
                                     Chick Industrial of Silver
                                  Lake is preparing to ship piec-
                                                                  
                                  es of the bridge structure to 
                                  South Carolina where they will
                                                                   
                                  be pressure treated and re-
                                  turned to the Granite State.
                                    The Silver Lake company
                                  will then put the pieces togeth-
                                                               
                                  er in six parts before trans-
                                  porting them to Dover where                                                                                                             
                                  Moore's Marine will put the
                                                                          
                                                                   
                                  finishing touches on the
                                  bridge, place it on a barge and 
                                  secure it in place, said Dean
                                  Peschel, a city planner.
                                   The covered bridge is an in-
                                  tegral part of a 170-space park- 
                                                        
                                                                  
                                  ing project on River Street and
                                  the celebrated redevelopment
                                  of Dover's historic riverfront.
                                                     
                                  The bridge will connect RIver      
                                                                  
                                  Street  to  Washington Street
                                                                  
                                  and nearby 0ne Washington
                                                          
                                  Center, which houses more
                                                           
                                  than 20 businesses.
                                    Advanced Systems, a new         An employee of Chick Industrial of Silver Lake prepares
                                                                                                                                 
                                                                                      
                                  tenant in  the former Clarostat   the 154-foot-long pedestrian bridge that will span the Co-      
                                  mill building, will lease at      checo River, connecting River Street to Washington                          
                                                                    Street.  The $190,000 bridge is scheduled to be in place by                           
                                                                    March.  (Courtesy photo)      
                                                                                                                   
                                                                                                                                                                                                                                                    
                                       Bridge                                                                                         
                                     Please turn to Page 12                        
                                                                                   


                                                                            least 100 of the  parking       The  bridge is  a Warren   Truss   engi-
                                                                  spaces.                                   neering type of bridge. It will be 154
                                                                                                            feet long across the river and eight
                                                                    In addition to the redevelopment        feet wide.
                                                                  and increased parking it will make
                                                                  possible, the bridge will be an attrac-    The bridge   is what is known as a
                                                                  tive part of the waterfront develop-     "drilled and   cut" structure, made
                                                                  ment on the historic river. It will pro- from Douglas fir shipped to New
                                                                  vide a substantial walking loop for      Hampshire from Oregon. The bridge
                                                                  the Cochecho Riverwalk project a         will be erected beside the site of the
                                                                  public/private project that involves     former Washington Street bridge, in
                                                                  beautification efforts and a brick pla-  case the city ever seeks to replace
                                                                  za at Henry Law Park.
                                                                                                             Many other changes are in the                                                                                                  
                                                                    The bridge will cost an estimated      works at the city-owned land off Riv-              
                                                                  $190,000, of which $135,000 will be      er Street.  In addition to the parking                                                         
											paid by the city and $55,000 will be     project, city officals are planning to
											provided by a COASTAL grant,             relocate the public works facility and				
											which is federal money distributed       possibly use some of the 35 acres for
											through the Office of State Planning.    redevelopment.
























































                                                                                                           Many other changes are in the
                                                                  The bridge will cost an estimated      works at the city-owned land off Riv-
                                                                  $190,000, of which $135,000 will be    er Street. In addition to the parking
                                                                  paid by the city and $55,000 will be   project, city officials are pianning to
                                                                  provided by a COASTAL grant,           relocate the public works facility and
                                                                  which is federal money distributed     possibly use some of the 35 acres for
                                                                  through the Office of State Planning.  redevelopment.
 








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                    Construction crews use ciaines to place a foot bridge on a                             $185,000 bridge will span 155 feet across -the Cocheco wa-
                    barge an the Cocheco River on Friday in Dover'. The                                    ters, connecting Washington and River streets..
                                                                                                                                                  .(Staff photo         Mark Bolton)
                                       ri                                  in
                    Walkway over Cocheco being put. into place                                                                                                in Dover
                              By DAN TUOHY                   control, but it is now ready to               Planning Director Steve Stan-             tions of the bridge . and the
                           Democrat Staff Writer             go. It's now on a barge and will              cel.                                      shipping.-of bridge parts t.o tile
                                                             be moved into place with the                   The barge will be positioned             sife, -Stancel explained. The
                                                             help of the tides in the days                 where the-bridge will normally            bridge,  'was"being put 'together
                     DOVER         Bridge anyone?            ahead.                                        stand - the tide waters allow-            behind One Washingt.on_'Cen-
                     You better believe ii, is the             The $185,000 bridge will span               ing ere ws to adjust-it until it          ter..
                   answer put forth by many resi-            155 feet across the Cocheco wa-               falls into place.                         -- The bridge- is   a crucial com-
                   dents and city officials who are          ters, I connecting Washington                  Moores Marine Construction               ponentof a. ngw parking lot o n-
                   praising the covered pedestri-            and River streets.                            Corp. of Dover assembled the              River Street       Ahat provides
                   an bridge that crews are now                Those interested in lessons                 bridge and is working to put it           'about 100 parking spaces for
                   putting into place over the Co-           in bridge handling ought to                   in its final resting place. Chick         'employees of Advanced Sys-
                   checo River.                              keep a close ey6 on the down-                 Industrial of Madison        m   anu-     tems in- Measurement, and
                     The bridge placement faced              town site, as the process is                  factured the bridge.
                   a delay of a couple of weeks              sure to be one of amazing pro-                 The delays were        caused by         741- -Bridge
                   due to circumstances beyond               portion, according to Dover'                  extended testing of steel por-,                Please turn to Pag'e 19

                                                                                                                                                                      .............. ....... ms-
                                                                                                                                          Evalua-     The pedestrian bridge will jib.
                                                                                                           tion, which relocated to nearby One       well with beautification efforts ongo
                                                                                                           Washington Center this year from of-      ing along the historic waterfron
                                                                                                           fices on Watson Road.                     downtown. The efforts, part of tht
                                                                                                           Additional parking is available in a      Cochecho Riverwalk that begins a
                                                                                                           lot just off River Street, in the vicini- Henry Law Park and extends alonj
                                                                                                           ty of the city's public works garage.     the riverside, are aimed at makinj
                                                                                                           The parking, as well as the bridge,       the park and riverfront more of
                                                                                                           is heralded by city officials as instru-  gathering place for friends and fami
                                                                                                           mental to helping economic develop-       ly.
                                                                                                           ment. In addition. most business           Leading the riverwalk project i
                                                                                                           owners and city officials say down-       the Greater Dover Chamber of Corn
                                                                                                           town Dover has a lack of parking and      merce and the city of Dover. wid
                                                                                                           they are working to solve that scarci-    significant  private    support     fron
                                                                                                           ty.                                       businesses and residents.


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           Interim Reports










 
                           
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                                      INTERIM REPORT - SEPTEMBER 30,1995
                                  COCHECHO RIVERWALK PEDESTRIAN BRIDGE


               The City of Dover initiated the project by preparing a Request for Proposals which utilized the
               design/build concept. The proposal required a contractor and engineering company to design and
               build the pedestrian bridge. Research prior to preparation of the RFP indicated we could
               construct a covered pedestrian bridge for about $125,000.

               Several companies expressed interest in the proposal at a mandatory site visit, however only one
               company submitted a proposal for $280,000.

               We have regrouped and hired HEB Engineering to develop various alternatives for a pedestrian
               bridge with cost analysis, prepare specifications, review final bridge designs and oversee
               installation of the structure.


               At this time we have selected the preferred bridge alternative and prepared a RFP for the
               superstructure. Bids are due October 5, 1995.

               The bridge project schedule calls for a late December or January installation.

               Enclosed are the three RFP's we have prepared to date.



















               dean/pedbrrep.sam









                                      INTERIM REPORT - DECEMBER 31,1995
                                 COCHECHO RIVERWALK PEDESTRIAN BRIDGE


              Bids for the bridge superstructure were received on October 5, 1995. John F. Chick & Son, Inc.
              of Silver Lake, New Hampshire was the low bidder at $94,500. The bid was awarded to John
              Chick & Son, Inc. by the Dover City Council on October 11, 1995. The bridge is scheduled for
              delivery in late January to mid February, depending on material availability.

              Design specifications were prepared for the installation of the bridge, the site work for abutments
              and approaches, and a cover which includes sides and roof alternatives. A package was
              assembled and a Request for Proposals was advertised. Moore's Marine of Dover, NH was the
              low bidder at $81,068 and awarded the contract on December 13, 1995, by the Dover City
              Council.


              The bridge completion date is mid February to mid March, depending on ice conditions in the
              river.


              The total contract costs for engineering the bridge superstructure and installation and cover
              exceed our current budget by $5,000. We have asked the NH Coastal Program to partially fund
              the engineering study and design of the bridge as a separate project with left over Coastal Funds.
              Without access to these additional funds, it is very unlikely that the bridge will be covered.












              dea"ridgelsm
























                                                INTERIM REPORT
                                                  MARCH 31,1996
                                COCHECHO RIVERWALK PEDESTRIAN BRIDGE


              The delivery of the bridge superstructure from Chick Manufacturing has been delayed as a result
              of problems associated with welds on the steel plates. This problem is being rectified and the
              promised delivery date is the first week of April.

              Moores Marine expects to spend four weeks erecting the bridge.

              Our completion date is expected to be early May.





















              dean/bridge3a.sam




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                              COCHECO RIVER PEDESTRIAN BRIDGE
                                      PRELIMINARY REPORT
                                          PREPARED FOR
                                       CITY OF DOVER, NU
                                           September 1995


















                                                          Prepared by-
                                                          H.E. Bergeron Civil Engineers, P.A.
                                         HID. S`K`3
                                                          20 Swett Street, P.O. Box 440
                                                          North Conway, NH 03860
                                                          (603) 356-6936





     H. Edmund Bergeron           P.O. Box 440                   603-356-6936
     Civil Engineers              Swett Street
                                  North Conway, NH 03860










                               August 3 ) 1, 1995
  1:H-B
                               City of Dover Planning Department
                               City Hall
                               Dover, NH 03820


                               Attn: Mr. Dean Peschel, Planner
                               Re:     Cocheco River Pedestrian Bridge

                               Dear Dean,

                               On August 10, 1995 the City of Dover authorized H. Edmund Bergeron Civil
                               Engineers,- PA to proceed with the design of the pedestrian bridge over the
                               Cocheco River. The purpose of this preliminary report is to investigate various
                               steel and timber truss alternatives and to make recommendations regarding the
                               most suitable, aesthetic, and cost effective alternatives. The types of bridges to
                               be evaluated include; open, clear span trusses (both timber and steel), and
                               covered trusses (primarily wood).

                               The proposed pedestrian bridge, which has an approximate span of .154', is to
                               cross the Cocheco River at the east end of Washington Street. This is the same
                               location where the Washington Street vehicular bridge was located. That bridge,
                               a steel truss built in 1897, was removed in the mid- to late-70's. Prior to removal
                               it had been closed due to poor condition. Attempts were made to preserve the
                               bridge as a historic land mark, but it was destroyed during remo    val. Cut stone
                               abutments and retaining walls are all that remain of the original bridge.

                               The proposed pedestrian bridge has been under consideration by the City of
                               Dover for some time. The bridge will connect the heavy pedestrian use area on
                               Water Street with the proposed City parking area and Public Works and School
                               Department Garages on River Street. It will also help tie together the City's
                               improvements to the Cocheco River waterfront.

                               A.     Existing Conditions:

                               The only remains of the original Washin ton Street Bridge are the abutments,
                                                            0            9
                               which are constructed of cut granite stabs.       Upon inspection by HEB, the
                                                                I
                               abutments were determined to be in adequate condition for use in supporting the
                               proposed pedestrian bridge. The tops of the abutments consist of concrete and









                                 Engineering Study                                                          Page 2
                                 Cocheco River Pedestrian Bridge




                                 small stones, which will have to be removed to construct new concrete bridge
                                 seats, receive new bearing pads, and to match the existing grades. The approach
                                 to the bridge will be tied into the existing sidewalk, on the west side of the river
                                 that runs in front of the Clarostat building. The approach on the east side of the
                                 river will be tied into the proposed River Street parking area.

                                 Down stream, about 50 feet from the proposed pedestrian bridge, there is a pipe
                                 bridge that carries sewage and gas. The pipe bridge initially was considered as a
                                 support for the pedestrian bridge, but was determined to be insufficient to hold
                                 the extra load.


                                 B.      Design Criteria:

                                 Bri(Ige:    Although the pedestrian bridge will not regularly experience typical
                                 vehicular load, it will have to be able to support a 7,000 lb. snow plow. Both
                                 AASHTO and BOCA were consulted to determine the load from pedestrian
                                 traffic. The BOCA criteria is 100 psf and AASHTO is 85 psf (AASHTO will be
                                 used ). The ground snow load in this area was determined to be 30 psf Wind
                                 load is to be 25 psf and designed as if the bridge has enclosed sides and a roof

                                 Basic bridge design criteria will be obtained from "Standard Specifications for
                                 Highway Bridges," 1992 edition, by the American Association of State Highway
                                 and Transportation Officials. BOCA was considered as a reference to compare
                                 with AASHTO, since the bridge is subjected to pedestrian loads, not vehicular
                                 loads.


                                 C       Bridge Type Study and Recommendations:

                                 The following are differen t truss types with different options:

                                 Truss types:                            Options:
                                         1) Warren truss                         A) Steel
                                         2) Part truss                           B) Wood
                                         3 )) Lattice truss                      C) Deck width 10 feet
                                                                                 D) Deck width 12 feet
                                                                                 E) With a roof
                                                                                 F) Without a roof
                                                                                 G) With sides
                                                                                 H) Without sides









                                Engineering Study                                                          Page 3
                                Cocheco River Pedestrian Bridge





                                Manufacturers of pre-engineered bridges did not quote on lattice type trusses due
                                to their high cost.


                                D.      Subsurface Conditions:

                                The bridge abutments were determined to be in good structural condition,
                                therefore borings to determine the subsurface conditions were not obtained.

                                E.      Hydrologic and Hydraulic Study:

                                The Cocheco River is dam controlled upstream, and downstream is tidal
                                controlled. A hydrologic and hydraulic study are not needed for the proposed
                                bridge because the old Washington Street Bridge did not encounter any high
                                water damage. The pipe bridge, located 50 feet down stream, also does not
                                show any high water damage. It is lower than the proposed pedestrian bridge and
                                spans the same width.

                                F.      Cost Estimate:


                                See the attached engineer's opinion of construction cost for each alternate.

                                G. Recommendations:


                                At this tim e we recommend that the City select either the 8-foot or 10-foot-clear-

                                w
                                  idth timber truss bridge described as Alternate No. I or 2. Our opinion of cost for
                                  i
                                these is $180,000 or $202,000 respectively.

                                As shown on the detailed estimate for Alternate NoA we have not been able to
                                finalize a price for a bridge provided by a local manufacturer. Chick Industrial of
                                Silver Lake (Madison), NE. is very interested in building the bridge. They feel that
                                they can produce the bridge for less than Western suppliers based on savings in
                                shipping alone. Unfortunately, to date they have not been able to obtain reasonable
                                prices for glulam beams and steel gussett plates. They are continuing to work on this
                                and hope to furnish a price within a week. Allowing approximately one week for your
                                review time before beginning final design would allow Chick to finalize their price
                                without significantly affecting the project.









                                   Engineering Study                                                                Page 4
                                      11)      1-D
                                   Cocheco River Pedestrian Bridge




                                   Please note that if the City makes it's decision on bridge width and sup     plier this week
      H-8                          (and pre-purchases the bridge itselo it appears, from the quotes that we have, that
                                   delivery would not be for 12 to 14 weeks. This places erection during the month of
                                   December, which may be questionable in terms of weather. If the bridge is to be
                                   purchased by the general contractor, it definitely will result in mid-winter erection.
                                   Based on this information you may want to do the abutment work tl@iis fall and delay
                                   erection of the bridge until spring or delay bidding for the entire project until January
                                   with a schedule for start in early spring.

                                   I hope that you find this report meets your needs. If you have any questions please let
                                   me know.


                                   Sincerely,





                                   H. Edmund Bergeron, PE.
                                   President




                                   enclosures
                                   En.-A cAocs'Teports,9 5 063rep. doe





                                                                                                                                                                                                                                                                                                                                          c 4 c e,@) ;e,'VC                                                            C@@,r 71@-
                                                                                                                                                                                                                                                              JOB
                                                                                                                            H.E. BERGERON                                                                                                                                                                                                                                                               OF
                                                                                                                            CIVIL ENGINEERS. P.A.                                                                                                             SHEET NO.
                                                                                                                            Swett Street                              P.O. Box 440
                                                           h.e.be                                                           NORTH CONWAY. NH 03860                                                                                                            CALCULATED BY                                                                                                                             DATE
                                                                                                                                            (603) 356-6936
                                                                                                                                                                                                                                                              ..CHECKED BY                                                                                                                              DATE


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                                                                                                                                              H.E. BERGERON                                                                                                                                      -T NO.-                                                                                                                     OF
                                                                                                                                              CIVIL ENGINEERS, P.A.                                                                                                                 SHEE
                                                                                                                                       Swett Street                                       P.O. BOX 440
                                                                            h.e.b.                                                     NORTH CONWAY, NH 03860                                                                                                                       CALCULATED BY                                                                                                                            DATE                       Z?
                                                                                                                                                         .(603) 356-6936
                                                                                                                                                                                                                                                                                    CKECKED BY                                                                                                                               DATE


                                                                                                                                                                                                                                                                                    SCALE



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                                                                  ORIZONTAL BARS
                                      4     NEW                  H
                                         C6NC*FTE
                                                           16            TRUSS
                                        4'       0                      BO TTOM
                                                                         CHORD






                  DOWELS                                                 @HOOP BARS
                                                                           ANCHOR BOLTS
                                                                           314"oxiB" LONG    Q)

                                                                             HORIZONTAL BARS
                                                          NEW:4@  4
                                                          CONC.





                                                                             DRILL & DOWEL
                                                                             INTO EXIS77NG
                                                                             STONE











                                        CLEAN & POIN
                                            OLD JOIN TS






















                                                                           WA TER L E VEL




                                           CROSS-SEC77ON VIEW
                                                SCALE. I" = 20'






                                       PROPOSED EAST ABUTMENT
                        H.ED11UND BERGERON                                        FIGURE 1
                        CIVIL ENGINEERS, P.A.  REHA BIL I TA 77ON
                        NORTH CON-WAY, N.H.       PREPARED FOR             DRWN. ALH        SCALE: AS SHOWN
                          (603) 356-69361   77-IE TOWN OF DOVER            IDA TE: 8125195  PROJ.   95063






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                                  75"



                                          NEW               HORIZONTAL BARS
                                         CONC.

                                                       16"         TRUSS
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                                                                   CHORD



               DOWELS                                                  ANCHOR BOLTS
                                                                       J14 "ox 18" LONG
                                                                       HOOP BAR        ;H
                                                                        HORIZONTAL BAR
                                                       NEW
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                                                                            DRILL & DOWEL
                                                                            INTO EXIST7NG
                                                                            STONE








                                     CLEAN & POIN
                                         OLD JOIN TS
























                                                                       WA TER L E VEL




                                        CROSS-SEC77ON       VIEW

                                             SCALE. 1   20'






                                     PROPOSED WEST ABUTMENT
                      KEDMUND BERGERON                                       FIGURE 2
                      CIVIL ENGINEERS, P.A. REHABILITAPON
                      NORTH CONWAY, N.H.       PREPARED FOR            DRWN: ALH       SCALE: AS SHOWN
                        (603) 356-6936   THF TO WN OF DO VER           DATE' 8125195 PROJ.    9506J
















                                              CITY OF DOVER, NEW HAMPSHIRE
    :H-8
                                           COCHECO RIVER PEDESTRIAN BRIDGE
                                                     SUMMARY OF COSTS'





                          Prepared by:         H. Edmund Bergeron Civil Engineers, P.A.
                                               P.O. Box 440, 20 Swett Street
                                               North Conway,     NH   03860

                          Date:                September 15, 1995


                                        ALTERNATE                                OPINION OF COST


                                                      Timber Truss
                          1 .    8-foot clear width
                                 furnished by Western Wood.,
                                 Structures, Inc., Taulatin, OR                       $180,000

                          2.     1 0-foot clear width - Timber
                                 Truss furnished by Western Wood                      $202,000

                          3.     1 0'-cle'ar width - Steel Truss f urnished
                                 by Continental Bridge, Alexandria, MN                $241,000


                          4.     1 0-foot clear width - Timber
                                 Truss furnished by Chick Industrial,
                                 Silver Lake, (Madison), N.H.                         No price yet...










                          c:\docs\misc\doversoc.doc














              ENGINEER'S PRELIMINARY OPINION OF PROBABLE COST -Alternate No. 1


              Prepared for:      Town of Dover
              Prepared by:       HEB Civil Engineers
              Date prepared:     9115/95


              Pedestrian Bridge over the Cocheco River
                                 S' Clear Wood Truss Bridge (Western Wood, Tualatin, OR)


                     Item                    Description                   -Unit    Quantity     Unit Cost        Amount
              206.2              Rock Structural Removal                   C.Y.               4       $39.00            $156
              206*19             Remove Existing Pavement                  S.Y.               8        $5.00             $40
              520.01             Class AA Concrete (Headwalls)             C.Y.             10      $460.00          $4,600
              544                Reinforcing Steel                         LB.             150         $0.50             $75
              550.2              Anchor Bolts                              Ea.                8       $12.00             $96
              561.11             Bearing Pads                              Ea.                4     $100.00             $400
                                 Base Plates                               Ea.                4       $60.00            $240
              692*               Mobilization                              L.S.               1       $2,500         $2,500
                                 Lighting                                Allow.               1       $5,000         $5,000
                                 Crane Rental                              L.S.               1   $30,000.00        $30,000
              ROOF
                                 5/8" Plywood                              S.F.          4200          $0.74         $3,108
                                 Roof Trusses                              Ea.              84        $48.00         $4,032
                                 Shingles                                  Sq.              42      $110.00          $4,620
              SIDES
                                 Siding                                    S.F.          2480          $1.84         $4,563
              BRIDGE TYPE
                                 Pratt/Warren Timber PT Truss,             L.S.               1   $97,000.00        $97,000
                                 Steel Gussette, 3" PT Timber Deck


                                                                                                  Subtotal         $156,430
                                                                                               15% Conting.         $23,465
                                                                                                    Total          $179,895
                         Notes:
                                 1. NHDOT average weighted unit prices used, except where noted by
                                 2. Item numbers followed. by * indicate lump sum allowance provided for that item.
                                 3. Bridge Package includes design, fabrication, and delivery of trusses, wood deck,
                                    rails, curbs, and the hardware needed to accept the roof and siding.
                                 4. Delivery of bridge 3-4 weeks for shop drawings, plus 9-10 weks additional for bridge.








                                                                  DOVSUM3.XLS














               ENGINEER'S PRELIMINARY OPINION OF PROBABLE COST -Alternate No. 2


               Prepared for:      Town of Dover
               Prepared by:       HEB Civil Engineers
               Date prepared:     9/15/95


               Pedestrian Bridge over the Cocheco River
                                  10' Clear Wood Truss Bridge (Western Wood, Tualatin, OR)


                      Item                    Description                  Unit     Quantity     Unit Cost        Amount
               206.2              Rock Structural Removal                  C.Y.               4       $39.00           $156
               206.19             Remove Existing Pavement                 S.Y.               8        $5.00             $40
               520.01             Class AA Concrete (Headwalls)            C.Y.             10      $460.00         $4,600
               544                Reinforcing Steel                        LB.             150         $0.50             $75
               550.2              Anchor Bolts                             Ea.                8       $12.00             $96
               561.11             Bearing Pads                             Ea.                4     $100.00            $400
                                  Base Plates                              Ea.                4       $60.00           $240
               692*               Mobilization                             L.S.               1       $2,500        $2,500
                                  Lighting                               Allow.               1       $5,000        $5,000
                                  Crane Rental                             L.S.               1   $30,000.00        $30,000
               ROOF
                                  5/8" Plywood                             S.F.          4200          $0.74        $3,108
                                  Roof Trusses                             Ea.              84        $48.00        $4,032
                                  Shingles                                 Sq.              42      $110.00         $4,620
               SIDES
                                  Siding                                   S.F.          2480          $1.84        $4,563
               BRIDGE TYPE
                                  Pratt/Warren Timber PT Truss,            L.S.               1 $116,100.00       $116,100
                                 ISteel Gussette, 3" PT Timber Deck                           I                         __j

                                                                                                  Subtotal        $175,530
                                                                                               15% Conting.         $26,330
                                                                                                    Total         $201,860

                          Notes:
                                  1. NHDOT average weighted unit prices used, except where noted by
                                  2. Item numbers followed by       indicate lump sum allowance provided for that item.
                                  3. Bridge Package includes design, fabrication, and delivery of trusses, wood deck,
                                     rails, curbs, and the hardware needed to accept the roof and siding.
                                  4. Delivery of bridge 3-4 weeks for shop drawings, plus 9-10 weks additional for bridge.








                                                                   DOVSUM4.XLS














                         ENGINEER'S PRELIMINARY OPINION OF PROBABLE COST -Alternate No. 3


                         Prepared for:       Town of Dover
                         Prepared by:        HEB Civil Engineers
                         Date prepared:      9/15/95


                         Pedestrian Bridge overthe Cocheco River
                                             10' Clear Steel Truss Bridge (Continental Bridge, Alexandria, IVIN)


                                Item                     Description                  Unit     Quantity      Unit Cost       Amount
                         206.2               Rock Structural Removal                  C.Y.               4       $39.00            $156
                         206.19              Remove Existing Pavement                 S.Y.               8         $5.00             $40
                         520.01              Class AA Concrete (Headwalls)            C.Y.              10       $460.00        $4,600
                         544                 Reinforcing Steel                        LB.              150         $0.50             $75
                         550.2               Anchor Bolts                             Ea.                8       $12.00              $96
                         561.11              Bearing Pads                             Ea.                4       $100.00           $400
                                             Base- Plates                             Ea.                4       $60.00            $240
                         692*                Mobilization                             L.S.               1       $2,500         $2,500
                                             Lighting                                Allow.              1       $5,000         $5,000
                                             Crane Rental                             L.S.               1   $30,000.00         $30,000
                         ROOF
                                             5/8" Plywood                             S.F.           4200          $0.74        $3,108
                                             Roof Trusses                             Ea.               84       $48.00         $4,032
                                             Shingles                                 Sq.               42       $110.00        $4,620
                         SIDES
                                             Siding                                   S.F.           2480          $1.84        $4,563
                         BRIDGE TYPE
                                             Continental High Profile Steel Box       L,S,               1  $150,000.00      $150,000
                                             Truss (Painted), with 3"X12" PT
                                            1wood deck


                                                                                                             Subtotal        $209,430
                                                                                                           15% Conting.         $31,415
                                                                                                               Total         $240,845
                                    Notes:
                                             1  NHDOT average weighted unit prices used, except where noted by
                                             2. Item numbers followed by * indicate lump sum allowance provided for that item.
                                             3. Bridge Package includes design, fabrication, and delivery of trusses, wood deck,
                                                rails, curbs, and the hardware needed to accept the roof and siding.
                                             4. Delivery of bridge in 3 pieces 3-4 weeks for shop drawings after placing order,
                                                and 12 weeks for fabrication and delivery.





                                                                      DOVSUM1.XLS














               ENGINEER'S PRELIMINARY OPINION OF PROBABLE COST - Alternate No. 4


               Prepared for:      Town of Dover
               Prepared by:       HEB Civil Engineers
               Date prepared:     9/15/95


               Pedestrian Bridge over the Cocheco River
                                  10' Clear Wood Truss Bridge (Chick Industrial, Madison, NH)


                      Item                     Description                  Unit     Quantity     Unit Cost        Amount
               206.2              Rock Structural Removal                   C.Y.               4       $39.00            $156
               206.19             Remove Existing Pavement                  S.Y.               8        $5.00             $40
               520.01             Class AA Concrete (Headwalls)             C.Y.             10      $460.00          $4,600
               544                Reinforcing Steel                         LB.             150         $0.50             $75
               550.2              Anchor Bolts                              Ea.                8       $12.00             $96
               561.11             Bearing Pads                              Ea.                4     $100.00             $400
                                  Base Plates                               Ea.                4       $60.00            $240
               692*               Mobilization                              L.S.               1       $2,500         $2,500
                                  Lighting                                Allow.               1       $5,000         $5,000
                                  Crane Rental                              L,S.               1   $30,000.00        $30,000
               ROOF
                                  5/8" Plywood                              S.F.           4200         $0.74         $3,108
                                  Roof Trusses                              Ea.              84        $48.00         $4,032
                                  Shingles                                  Sq.              42      $110.00          $4,620
               SIDES
                                  Siding                                    S.F.          2480          $1.84         $4,563
               BR'IDGE TYPE
                                  Pratt/Warren Timber PT Truss,             L.S.
                                ISteel Gussette, 3" PT Timber Deck

                                                                                                   Subtotal          $59,430
                                                                                                 15% Conting.         $8,915
                                                                                                     Total           $68,345

                          Notes:
                                  1.  NHDOT average weighted unit prices used, except where noted by
                                  2.  Item numbers followed by       indicate lump sum allowance provided for that item.
                                  3.  Bridge Package includes design, fabrication, and delivery of trusses, wood deck,
                                      rails, curbs, and the hardware needed to accept the roof and siding.
                                  4.  Delivery of bridge 3-4 weeks for shop drawings, plus 9-10 weks additional for bridge.







                                                                    DOVSUM2.XLS








   H=8





                                        CITY OF DOVER, NH
                                    FINAL SPECIFICATION FOR
                              COCHECHO RIVER PEDESTRIAN BRIDGE
                                        SEPTEMBER 21,1995



























                 Prepared by: H. Edmund Bergeron Civil En-ineers, PA
                                                    Z-1)
                             PO Box 440, 20 Swett Street
                             North Conway, NH 03860
                             (603)) 356-6936





     H. Edmund Bergeran            P.O. Box 440                  603-356-6936
      Civil Engineers              Swelt Street
                                   North Conway, NH 03860








                                                            CITY OF DOVER, NH
                                                        FINAL SPECIFICATION FOR
 'H-B                                           COCHECO RIVER PEDESTRIAN BRIDGE
                                                            SEPTEMBER 21,1995




                                The City of Dover, NH, intends to purchase a pre-engineered timber pedestrian
                                bridQe for installation on existinc, abutments (to be modified by the City). The
                                                                Z:p
                                location of the bridae is over the Cocheco River between Washinaton Street and
                                River Street at the site of the former Washinaton Street vehicular bridge.
                                                                            _:1

                                The bridge manufacturer's proposal price should include all engineering design,
                                shop drawings and details, manufacturer all necessary components, and shipping
                                to a desidnated site in Dover, NH. The bridge must include all necessary added
                                load capacity and hardware to support a timber-frame roof and 50% wood sides
                                to be installed by the City at a later date. The manufacturer should specify how
                                the bridLe is to be shipped (i,e. completely disassembled and broken down, or
                                partially assembled and number of pieces). The manufacturer should furnish a
                                separate per diem rate to furnish a technical advisor during the assembly of the
                                bridi,,e.


                                The specifications are as follows:

                                Desigpi Criteria:

                                       Truss type-                    Warren
                                       Span:                          154 ft - 6 inches bottom chord overall
                                                                      153 ft - 6 inches bottom chord center -
                                                                      center of bearing
                                       Truss hei,,ht:                 Varies with the chord size. Top of deck to
                                                                      bottom of roof trusses 10 ft - 0 inches clear
                                       Clear width (curb -curb)       8 ft - 0 inches


                                       Chords                         Glulaminated timber
                                       Webs & other members           Solid sawn timber
                                       Camber                             0" at center of span


0





                               City of Dover, New Hampshire                                               September 21, 1995
                               Final Inspection for Cocheco River Pedestrian Bridge                                   Page 2










                               Loading Criteria:


                                      Dead load                    Based on actual material weights
                                      Pedestrian live load or      85 pounds per square foot
                                      Snow plow vehicle            7000 pounds
                                      Snow load                    30 pounds per square foot
                                      Wind load                    25 pounds per square foot

                               Material requirements:

                                      Glulam Chords:               Douglas Fir or Southern Pine Allowable
                                                                   bending stress
                                                                   Fb, = 2400 psi and Modulus of elasticity E
                                                                   = 1.7 x E6
                                                                   Industrial appearance grade with 100%
                                                                   waterproof glue.
                                                                   Completely fabricated, sawn and drilled
                                                                   prior to treatment.
                                                                   Manufacture Glulaminate lumber according
                                                                   to AITC specification 117-87.

                                      Sawn Lumber:                 Douglas Fir or other species meeting the
                                                                   stress requirements.
                                                                   Surfaced 4 sides (S4S) and completely
                                                                   fabricated, sawn and drilled prior to
                                                                   treatment. Manufacture according to AITC
                                                                   specification 108-80.

                                      Pressure Treatment:          Glulam beams and sawn lumber will be
                                                                   pressure treated with Pentachlorophenol
                                                                   0.3 pcf retention per AWPA specifications
                                                                   and AITC 109-84.


                                      Hardware:                    All steel hardware to connect the bridge
                                                                   superstructure together to be galvanized or
                                                                                               
                                                                   Cor-ten weathering steel.
 

0





                               City of Dover, New Hampshire                                       September 21, 1995
                               Final Inspection for Cocheco River Pedestrian Bridge                           Page 3





                                                                      This includes all gusset plates, braces, clip
                                                                      angles, hangers, rods, double grip spikes,
                                                                      and all miscellaneous nuts and bolts.

                                       Handrails:                     To be furnished and installed by the City.

                                       Bearings:                      The manufacturer shall furnish steel bearing
                                                                      plates and suitable neoprene bearing pads.
                                                                      Anchor bolts by the City.

                                       Roofing & Siding:              To be furnished and installed by the City.

                                       Shop Drawings &                To be furnished by the manufacturer,
                                       Engineering Calcs              revised as requested by the Engineer and to
                                                                      bear the seal of a New Hampshire licensed
                                                                      professional engineer (structural).

                                       Schedule:                      Provide the City with schedule including
                                                                      time for delivery of shop drawings after
                                                                      manufacturer receives a purchase order
                                                                      from the City and time for delivery of the
                                                                      bridge to Dover, NH after approval of the
                                                                      shop` drawings.

                                       Proposal Date:                Return proposal to the City no later than
                                                                     2 p.m., October 5, 1995.
 









                                                                                           ROOF TRUSS
                                                                           TO BE ADDED IN FU TURE
               518    CDX PLYWOOD
                          SHEA THING                                                        3 Y 0 THERS)
                          3 Y OTHERS









                                                                                 GLULAM
                                                                            TOP CHORD


                                                                        LIGHTS BY CITY




                                                                           KNEE BRA CES.
                                                                                  BY CITY





                                                                                         WEB
                                                                              SOLID SA WN
                                                                                OR GLULAM


               2x4 PT                                                           HANDRAIL
           STRAPPING                                                      PROVIDED A T                                          cj-
                                                                          CODE HEIGH T

                                                                   8'-0" CLEAR
                                                                                                                           co




                                                                           TIMBER    CURB
                                                                                                                           >-
                                        71
           J114   PINE
                SIDING
         3 Y 0 THERS                                              5 TRINGERS
                                                        SOLID SA WN OR GLULAM
                                                                FLOOR BEAM

                                                                                 GLULAM
                                                                       BOTTOM CHORD




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      tri
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      7,



      ru
                               H.EDMUND BERGERON           COCHECO RI VER
                               CR71L ENGINEERS, P.A.    PED                                             FIGURE              I
      a,                                                      ESTRIAN BRIDGE
                               NORTH CONWAY, N.H.
                                                              PREPATED FOR                    DRWN.- ALH                    1'-20'
      0                          (603) 356-6936
      CL         @B                                  T14F rITY nF nnvg-p AIP DATE@ 9122195                         PRf- =( -9506J















                      5'-,l 112"                                         CLI-1-A-11f Tcp Cr@ORO--\                                       so_llrl SA:tV 017 GLULAM VIZ3S





                          YEL -,',D                                                           :::j'-6** CEN7FR---,,j7-7P Or


                                                                                                         154'-6' O"vERALL


                                                                                                                                                                                                                   ON


                                                                                                WARREN TRUSS





                                                   TO? TO BE @-O.:S-R-'-CTED IN A Si.-,.@,LE PLANE

                                  2.   C@iOR4@-- 7 BE IN LONGEST "OSS: ;f LEN@7r@S.
                                                   ,3                             3-

                                  J.   C0t@,,,,EC7)0:iS TO BE G@-ILVA,VIZED OR COF-'-@rllj WEATHE@?IAIG STFE@l
                                                  P-'A TES AT PANEL POINTS.

                                       Srr A7T-:r@@-;-D SPECiF1CA-,IO;',S FOR VAT:--?.,,4L
                                  4.                                                              AND OTHER REQuiREmENTS





                                                                                                                                         H.EWUNM SEFIERON       COCHECO RI VER                       FIG RE
                                                                                                                                         cra         P@      PEDESTRIAN BRIDGE
                                                                                                                                         NOM.        N'H                                     '?
                                                                                                                                           (6031 355-5936        PREPARED FOR                      ALH       SCA-1 L@
                                                                                                                                                             THE CITY OF' DOVER             rA-.. 91221.95   PROJ








                                            jo            2




                                       1  '4
                                                   A*
                                            N               -HORIZONTAL BARS
                                             E w
                                         C@)NC9?&TE                    TRUSS
                                                          76"          BO TTOM
                             J-         4i                             CHORD
                                                                       112" NEOPRENE PAD





                  DOWELS                                                  HOOP BARS
                                                                         ANCHOR BOLTS
                                                                         J14
                                                                             Ox7(3" LONG  Q)

                                                                           HORIZONTAL BARS
                                                         NEW:4.  4
                                                         CONC.





                                                                           DRILL & DOWEL
                                                                           INTO EXISTING
                                                                           STONE





                               Ln




                                        CLEAN & POIN
                                           OLD JOINTS























                                                                         WATER LEVEL




                                          CROSS-SECTION VIEW
                                                SCALE: 1" = 20'
   t
    (5

    L6
    0,

    ol                                PROPOSED EAST ABUTMENT
                        H.EDMUND BERGERON                                       FIGURE 3
                        CML ENGINEERS, P.A.    REHABILI TA 77ON
                        NORTH CONVAY, N.Hj       PREPARED FOR            DRWV.- ALH       SCALE: AS SHOWN
                          (603) 356-6936
       @F=B                                THE TOWN OF DOVER             DATE: 8125195 PROJ. f 95063







                                                                      2"

                                              75



                                           A
                                                      A
                                                        NEW*
                                                                     ___--HORIZONTAL BARS
                            Q)                         CONC.
                                                                                      TRUSS
                                                                         75"          BOTTOM
                                                                                      CHORD

                                                                                      712 " NEOP RENE PAD


                      DOWELS                                                              ANCHOR BOLTS
                                                                           4              J14"OX78" LONG
                                                                                          HOOP BAR
                                                                               -------HORIZONTAL BAR
                                                                        NEW   ''
                                                                       CONe-    4"








                                                                                                 DRILL & DOVr=L
                                                                                                 IN TO EXIS TING
                                       LQ                                                        5 TONE




                                       Lo
                                                 CLEAN & POIN
                                                      OLD JOINTS























                                                                                         WA TER L E VEL




                                                    .CROSS-SECTION VIEW
                                                           SCALE. 1" = 20'





      cu
      cu
                              H.EDMUND BERGERON PROPOSED WEST A3U7VENT                           FIGURE 4
                              CIVIL ENGINEERS, P.A.       REHA 31L / TA TI ON
                               NORTH COYWAY, N.H.            PREPARED FOR
                                 (603) 356-6936                                          DR WV A LH          SCALE.- AS SHOWN
          H@@B                                                                  ER       DA TE 312519-5      Pi?OJ.   9506J
                                                      THE TOWN OFDOV


								City of Dover Invitation to Bid
							Cochecho River Pedestrian Bridge #B96024

	The City of Dover, NH is requesting pricing information and availability for the purchase
of Pedestrian Brige to be used to cross the Cochecho River in Dover, NH. Specifications and
general information is as follows:


	The bridge is to be pre-engineered, cover a span of approximately 154 feet, be constructed
of glulaminated timber, and be delivered in pieces or in sections to Dover for installation by the
City.

	Any questions about the project may be directed to Mr. Dean Peschel at 603-743-6013 or
Mr. Dan Kelly at 603-743-6030.

	$ 94,500.00		bridge engineered, pre-fabricated, delivered, warranted

	$    400.00		per diem rate for technical advisor during assembly on-site

	Shipping Information (number of pieces, sections, ?):
	6 @ 55' x @ 12' Pre-fabricated Lam & Web Panels
	Beams, joists, deck, curb & misc. hardware shipped loose.

anticipated delivery			90 days from acceptance
date:						of engineered drawings

Submitted by:				John F. Chick & Son, Inc.
						Rte #113
						Silver Lake, NH 03875
Warranty/guarantee:			See Below*					Price holds for:	30 days
Telephone#:					800-258-4692				Fax:			603-367-8859
Signature:											Title:		VP/Operations

Check here if appropriate:						(x)NO BID

Any deviations from the above sated specifications must be so noted and any bid prices must be
reflective of these deviations. The FOB point is alays to be Dover unless otherwise stated by the
bidder. An FOB point other than the City of Dover must be so stipulated by the bidder.

*All members and assemblies will be made according to engineered
 drawing and will be free of workmanship defects. All Gluelams,
 pressure treating and steel fabricating will be done according
 to ANSI and/or AWPA standard. Certification available upon requuest.
						                                            





                                                                                                                     I NO" COAVAI SERIMES CTR UBRARY

                                                                                                                      3 6668 14112713 6