am0004.pdf

Am #0004 - 1

DEPARTMENT OF THE ARMY

Omaha District, Corps of Engineers 106 South 15th Street Omaha, Nebraska 68102-1618

:NOTICE: Failure to acknowledge : Solicitation No. W9128F 08 B 0005 :all amendments may cause rejec- :

:tion of the bid. See FAR : Date of Issue: 15 Apr 2008 :52.214-3 of Section 00100 : New Date of Opening: 22 May 2008

Amendment No. 0004 14 May 2008

SUBJECT: Amendment No. 0004 to Specifications and Drawings for Construction of Antelope Creek, Phase 3, Flood Protection Project, Lincoln, NE Solicitation No. W9128F 08 B 0005.

TO: Prospective Bidders and Others Concerned

1. The specifications and drawings for subject project are hereby modified as follows (revise all specification indices, attachment lists, and drawing indices accordingly).

a. Specifications. (Descriptive Changes.)

(1) Section 00800 Page 6, paragraph 1.8 DAMAGE TO WORK,-

Add the following subparagraph below existing paragraph:

“This paragraph does not apply if equivalent protection upstream of the labyrinth weir is not provided and flooding occurs outside the existing floodplain.

(2) Section 01200 Page 3, paragraph 1.3.3 FLOOD PROTECTION

WORKS, Add following subparagraph below existing paragraph:

“Contractor shall provide equivalent protection upstream of the labyrinth weir until the work downstream of the labyrinth weir is sufficient to withstand a flood event.

(3) Section 01320A Page 5, paragraph 3.3.2.3 MILESTONE

ACTIVITIES, item 7, delete “Substantial completion downstream, “

(4) Section 01550 Page 17, paragraph 28.1, fifth line, insert

“0031 CELLULAR CONCRETE MATTRESS, ” after “items”.

(5) Section 01550 Page 18, paragraph 31.1, third line, insert

“excavation and backfilling of anchor trenches,” after “including”.

(6) Section 02210 Page 7, paragraph 3.2, Add the following new subparagraph below existing paragraph:

"At the Contractors option, surplus excavated satisfactory material not required for fill may be deposited on property owned by the Nebraska Department of Roads (NDOR). A total of approximately 25,000 cubic yards may be deposited at Site No. 1 located at the southeast corner of West Pioneers Boulevard and US Highway 77 in the southwest part of Lincoln, Nebraska.

Am #0004 - 2

Access to the site is limited to the existing drive that enters the site from West Pioneers Boulevard. The remaining surplus excavated satisfactory material not required for fill may be deposited at Site No. 2 located at the northwest corner of West Old Cheney Road and US Highway 77 in the southwest part of Lincoln, Nebraska. Access is limited to a drive that enters the site from West Old Cheney Road. This drive will be located by the NDOR and built by the Contractor. The Contractor will be responsible for maintaining a rock construction entrance, depositing, spreading (leveled off so vegetation can be maintained) the excavated material in the area staked by the NDOR and traffic compacted sufficiently to keep it in place. The NDOR will secure all required permits and make application to the Nebraska Department of Environmental Quality (NDEQ) to deposited material under the requirements of the current Construction Storm Water Permit. The NDOR will install and maintain all temporary and permanent erosion/sediment control measures at the site. The NDOR will create and maintain the SWPPP and perform all required inspections. The Contractor shall contact the NDOR District Engineer, Mark Traynowicz (402-471-0850, extension 1069) a minimum of 14 days prior to commencement of depositing material to coordinate this effort. The provision that no fill shall be placed within a floodplain applies at both sites."

b. Specifications (New and/or Revised and Reissued). Delete and substitute or add specification pages as noted below. The substituted pages are revised and reissued with this amendment.

Pages Deleted Pages Substituted or Added

00010-3 thru 00010-7 00010-3 thru 00010-7

c. Drawings (Reissued). The following drawing sheets are revised with latest revision date of 14 May 2008, and reissued with this amendment.

(1) Sheets:

LN12G012

LN12G209

LN12G210

LN12G211

LN12G307

LN12G308

LN12G309

LN12G310

LN12G354

LN12G355

LN12G455

LN12G456

LN12G550

LN12G630

LN12G631

LN12C310

LN12AV122B

2. This amendment is a part of the bidding papers and its receipt shall be acknowledged on the Standard Form 1442. All other conditions and requirements of the specifications remain unchanged. If the bids have been mailed prior to receiving this amendment, you will notify the office where bids are opened, in the specified manner, immediately of its receipt and of any changes in your bid occasioned thereby.

Am #0004 - 3

a. Hand-Carried Bids shall be delivered to the U.S. Army Corps of Engineers, Omaha District, Contracting Division (Room 301), 106 South 15th Street, Omaha, Nebraska 68102-1618.

b. Mailed Bids shall be addressed as noted in Item 8 on Page 00010-1 of Standard Form 1442.

3. Bids will be received until 2:00 p.m., local time at place of bid opening, 22 May 2008.

Attachments:

Standard Form 1442 Pages 00010-3 thru 00010-7 Dwgs. listed in 1.c. above Responses To Contractors Questions (For Information Only)

U.S. Army Engineer District, Omaha Corps of Engineers 106 South 15th Street Omaha, Nebraska 68102-1618

14 May 2008

MFS/4411

00010-3 Am #0004

BIDDING SCHEDULE (with Options)

Basic

Item Estimated Unit No. Description Quantity Unit Price Amount

0001 All plant, material, and labor required for CLEARING AND GRUBBING Job L.S. $________

0002 All plant, material, and labor required for PAVEMENT REMOVAL AND DISPOSAL Job L.S. $________

0003 All plant, material, and labor required for CHANNEL LINING REMOVAL AND DISPOSAL Job L.S. $________

0004 All plant, material, and labor required for DEWATERING Job L.S. $________

0005 All plant, material, and labor required for EXCAVATION 310,000 C.Y. $________ $________

0006 All plant, material, and labor required for RUBBLE EXCAVATION

AND DISPOSAL 2,000 C.Y. $________ $________

0007 All plant, material, and labor required for UTILITY DEMOLITION Job L.S. $________

0008 All plant, material, and labor required for CLEAR TRACT (420 NORTH 20TH STREET) excluding Items 0009 and 0010 Job L.S. $________

0009 All plant, material, and labor required for LEAD REMOVAL AND DISPOSAL (420 NORTH 20TH STREET) Job L.S. $________

0010 All plant, material, and labor required for ASBESTOS REMOVAL AND

DISPOSAL (420 NORTH 20TH STREET)

0010A. Textured Ceiling 1,700 S.F. $________ $________ 0010B. Floor Mastic 1,000 S.F. $________ $________

0011 All plant, material, and labor required for CLEAR TRACT (2218 “N” STREET) Job L.S. $________

0012 All plant, material, and labor required for CLEAR TRACT (2231 “N” STREET) excluding Items 0013 through 0016 Job L.S. $________

00010-4 Am #0004

0013 All plant, material, and labor required for LEAD REMOVAL AND DISPOSAL (2231 “N” STREET) Job L.S. $________

0014 All plant, material, and labor required for ASBESTOS REMOVAL AND

DISPOSAL (2231 “N” STREET)

0014A. Insulation 60 L.F. $________ $________ 0014B. Glazing 200 L.F. $________ $________ 0014C. Caulking 250 L.F. $________ $________

0015 All plant, material, and labor required for SUMP/DRAIN

REMOVAL AND DISPOSAL

(2231 “N” STREET) Job L.S. $________

0016 All plant, material, and labor required for PCB AND/OR MERCURY

REMOVAL AND DISPOSAL

(2231 “N” STREET) Job L.S. $________

0017 All plant, material, and labor required for CLEAR TRACT (KUKLIN POOL AND BATH HOUSE) excluding Items 0018 and 0019 Job L.S. $________

0018 All plant, material, and labor required for ASBESTOS REMOVAL AND

DISPOSAL (KUKLIN POOL AND BATH HOUSE) 100 L.F. $________ $________

0019 All plant, material, and labor required for LEAD REMOVAL AND DISPOSAL (KUKLIN POOL BATH HOUSE) Job L.S. $________

0020 All plant, material, and labor required for CLEAR TRACT (OLD MUNY POOL AND PUMP HOUSE) excluding Items 0021 and 0022 Job L.S. $________

0021 All plant, material, and labor required for ASBESTOS REMOVAL AND

DISPOSAL (OLD MUNY POOL AND PUMPHOUSE

PIPING) 100 L.F. $________ $________

0022 All plant, material, and labor required for ASBESTOS REMOVAL AND

DISPOSAL (OLD MUNY POOL PUMP HOUSE

EXTERIOR) 1,200 S.F. $________ $________

0023 All plant, material, and labor required for LEAD REMOVAL AND

DISPOSAL (EXISTING PEDESTRIAN

BRIDGE) Job L.S. $________

0024 All plant, material, and labor required for PEDESTRIAN BRIDGE #3 excluding Item 0025 Job L.S. $________

00010-5 Am #0004

0025 All plant, material, and labor required for RELOCATED IRRIGATION LINE (PEDESTRIAN BRIDGE #3) Job L.S. $________

0026 All plant, material, and labor required for DRAINAGE STRUCTURES

0026A. Drainage Structure #30 Job L.S. $________ 0026B. Drainage Structure #31 Job L.S. $________ 0026C. Drainage Structure #32 Job L.S. $________ 0026D. Drainage Structure #33 Job L.S. $________ 0026E. Drainage Structure #34 Job L.S. $________

0027 All plant, material, and labor required for CRUSHED STONE Job L.S. $________

0028 All plant, material, and labor required for COMPACTED BACKFILL Job L.S. $________

0029 All plant, material, and labor required for CONCRETE LOW FLOW CHANNEL excluding Item 0042, OPTION 2 – EAST DOWNTOWN PARK

CONCRETE LOW FLOW CHANNEL 400 C.Y. $________ $________

0030 All plant, material, and labor required for CONCRETE CHANNEL

LINING 760 C.Y. $________ $________

0031 All plant, material, and labor required for CELLULAR CONCRETE

MATTRESS

0031A. Type A 13,700 S.Y. $________ $________ 0031B. Type B 3,200 S.Y. $________ $________

0032 All plant, material, and labor required for CONCRETE BIKE TRAIL 7,660 S.Y. $________ $________

0033 All plant, material, and labor required for LABYRINTH WEIR Job L.S. $________

0034 All plant, material, and labor required for CONDUIT EXTENSION Job L.S. $________

0035 All plant, material, and labor required for “N” STREET ROADWAY AND UTILITIES Job L.S. $________

0036 All plant, material, and labor required for TOPSOIL Job L.S. $________

0037 All plant, material, and labor required for SEEDING AND MULCHING 20 Acres $________ $________

00010-6 Am #0004

0038 All plant, material, and labor required for SURFACE EROSION

CONTROL BLANKET

0038A Erosion Control Blanket 56,000 S.Y. $________ $________ 0038B Turf Reinforcement Mat 16,400 S.Y. $________ $________

0039 All plant, material, and labor required for LANDSCAPING Job L.S. $________

0040 ALL REMAINING WORK excluding Basic bid items 0001 through 0039 and Optional bid items 0041 through 0049 listed below Job L.S. $________

BASIC TOTAL AMOUNT (Items 0001 through 0040) $________________

Options

Item Estimated Unit No. Description Quantity Unit Price Amount

0041 All plant, material, and labor required for OPTION 1 – BENT

ENCASEMENT

0041A. “O” Street Bridge Job L.S. $________ 0041B. “P” Street Bridge Job L.S. $________ 0041C. “Q” Street Bridge Job L.S. $________ 0041D. “Y” Street Bridge Concrete Staining Job L.S. $________ 0041E. Vine Street Bridge Concrete Staining Job L.S. $________

0042 All plant, material, and labor required for OPTION 2 – EAST DOWNTOWN

PARK CONCRETE LOW FLOW CHANNEL 1,725 C.Y. $________ $________

0043 All plant, material, and labor required for OPTION 3 – EAST DOWNTOWN

PARK RETAINING WALLS (RESOURCE

DEVELOPMENT) Job L.S. $________

0044 All plant, material, and labor required for OPTION 4 – EAST DOWNTOWN

PARK RETAINING WALLS (LINCOLN PARKS &

RECREATION DEVELOPMENT) Job L.S. $________

0045 All plant, material, and labor required for OPTION 5 – EAST DOWNTOWN PARK IRRIGATION Job L.S. $________

00010-7 Am #0004

0046 All plant, material, and labor required for OPTION 6 – “N” STREET BRIDGE Job L.S. $________

0047 All plant, material, and labor required for OPTION 7 – “N” STREET BRIDGE PILING (HP 10 x 42) 4,335 feet $________ $________

0048 All plant, material, and labor required for OPTION 8 – “N” STREET BRIDGE PILING (HP 14 x 89) 2,640 feet $________ $________

0049 All plant, material, and labor required for OPTION 9 – “N” STREET BRIDGE ABUTMENT RETAINING WALLS) Job L.S. $________

BASIC + OPTIONS TOTAL AMOUNT

(Basic Items 0001 through 0040, and Option Items 0041 through 0049) $____________

Notes for Bidding Schedule:

1. See Section 00100, INSTRUCTIONS, CONDITIONS, & NOTICES TO OFFERORS, for evaluation of options. The Government reserves the right to exercise an option within 60 days after issuance of Notice to Proceed. See Section 00800 for completion dates for the basic and options.

2. Bid prices must be entered for all items of the schedule. Total amount bids submitted without bid prices being entered on individual items will be rejected.

Extensions will be subject to verification by the Government. In case of variation between the unit price and the extension, the unit price will be considered the bid. In case of variation between the individual bid item prices and the total amount, the individual bid prices will be considered the bid.

3. Quantities for unit priced items are estimated only and the respective unit price will prevail in the event of an overrun or underrun subject to Contract Clause (Section 00700) "Variation in Estimated Quantities."

4. A modification to a bid, which provides for a single adjustment to the total amount bid, should state the application of the adjustment to each respective unit price and lump sum price affected. If the modification is not so apportioned, the single adjustment will be applied to Basic Bid Item No. 0040.

5. See Section 01550, MEASUREMENT AND PAYMENT, for additional information on the bid items.

Antelope Creek Flood Control Project Phase 3 Responses To Contractors Questions

AM 0004

(Continuation of Responses To Contractors Questions included in AM 0001 thru AM 0003)

Question 25 Do you have a calculation as to the amount of compacted backfill required in the base bid? The quantity was given to us for the Phase 2B Project.

Could you please provide the quantity of compacted backfill for the project. These numbers have been provided on previous phases of the channel.

Response: Item 0028 is to be bid as a lump sum item.

Question 26 Regarding Concrete Cellular Mattresses; this is a SY quantity. Is this an established quantity or will actual SY of mats be paid? Reasoning is based on whether slopes and anchor trenches were accounted for in this quantity.

Are the turn-down areas for the cellular mattresses included in the Corps’ quantity or are they subsidiary to the quantity bid item?

Response: Item No. 0031 quantity revised (true area including anchor trenches). See bid schedule resubmitted in Amendment 4.

Question 27 Contractor needs verification regarding the turn-down quantities for the concrete channel liner.

Are these turn-down volumes included in the cubic yards that the Corps has for their bid items?

Response: Excavation for turn downs are to be included in item 0031. See Amendment 4 for clarification to Section 01550, paragraph 31.1.

Question 28 Regarding Section 1355-4 of the Environmental section, please verify as to the part of the surface discharge permit, how many surface discharge water tests will the contractors need to figure while sumping or dewatering on this project?

Response: If we are correct in our interpretation that the question was in reference to dewatering discharges, the NPDES permit from the Nebraska Department of Environmental Quality states "weekly monitoring" is required. After six weeks of monitoring has demonstrated compliance, a reduction may be requested. Since the Contractor has to obtain the permit, recommend the Contractor contact the NDEQ for additional information/requirements.

Responses To Contractors Questions

Question 29 Ref sht G5.50, Wier low flow channel profile; Elevation references on the side of the profile don't match up.

Response: See sheet G5.50 reissued with Amendment 0004.

Question 30 Ref ShtAV 1.22B, Wall Curve Data for wall #11-14; Wall lengths don't match Wall #11-14, shts

AV1.34

Response: Sheet AV1.22B will be re-submitted with revised wall curve data as a part of Amendment 4.

Question 31 Regarding ref G4.56 Sta 2+70 T.O. Ftg. What is correct elevation?

Response: Sheet G4.56 reissued in Amendment 4 with corrected elevation of 1156.50.

Question 32 Ref Sub Drains, Walls # 1,2,8,9,11,15,16,17,18,19 ARE SHOWN IN THE AV drawings and detailed on shtAV1.51. This detail shows 4" PVC pipe with a reducer to 2" through the wall with no casting 10'O.C. max. All of the above walls are bridge abutment wing walls. The "N" street retaining walls, Labyrinth wier retaining walls, and the conduit retaining walls are referred under sht S3.01 details showing a typical drain flap gate detail. This shows 6" Pvc pipe at 40' O.C.

max. Is this your intent to only use castings on these retaining walls?

Response: The details shown on sheet AV1.51 apply to walls 1-21 found on the AV sheet and do not require casting.

Question 33 Contractor needs verification regarding the sales tax on this project. On all Antelope Valley projects that we have completed, all those projects have been tax exempt. Note the N Street Bridge and the N Street Utilities are an Antelope Valley project. Are those portions or other portions of the project tax exempt? Please verify.

Response: No portion of the project is tax exempt. (Section 00100, page 11, paragraph 28.)

Responses To Contractors Questions

Question 34 Reference spec section 1.7.6. The existing city roads in this area are in poor shape as they sit today. This project will require an abnormal amount of hauling on them to complete the work.

If the contractor is hauling within legal parameters and the roads become more damaged, is the contractor expected to include the restoration of these roads in the base bid? If so, could the CORPS provide a bid item for milling and overlaying these roads by the ton? This would relieve a contractor from adding an uneconomical amount of money to cover these unknown expenses.

Response: Section 01200, page 7, paragraph 1.7.6 requires the Contractor to “comply with any restrictions the City may impose relative to load limits”. A bid item for restoration will not be provided.

Question 35 N Street roadway and utilities is part of the base bid. N Street Bridge is part of the options. If the bridge does not get built as part of this contract, will the contractor need to include temporary measures to barricade this roadway from the new channel, such as concrete barriers and temporary sheet piling?

Response: If Options 6, 7, and 8 are not executed, Option 9 would also not be executed and barricades would be be placed per Section 01200, page 7, paragraph 1.7.4 Barricades.

Question 36 Is the east downtown park low flow liner going to be paid for by the cy ticket supplied by the ready mix concrete supplier? This would be the same method the low flow liner is being paid in the base bid.

Response: Payment will be based on concrete truck delivery tickets.

Responses To Contractors Questions

Question 37 It is noted on plan sheet G3.10, that the Labyrinth Wier cannot start until the downstream work is substantially completed and approved. Our question is, can construction on the Labyrinth Wier start sooner if the proper erosion and dewatering measures are followed and accepted?

This is a very large structure and starting the Labyrinth Wier potentially after 75% of the project is complete, may press a contractor for time.

Response: Contractor may construct labyrinth weir provided equal or better flood protection to prevent damage to stuctures in this contract. (Reference Section 01200, page 1.3.3 Flood Protection Work.)

The Government will not be liable to downstream Phase 3 contract structures if equal or better flood protection is not provided. (Reference Section 00800, page 6, paragraph 1.8 DAMAGE

TO WORK.)