Addendum #1.pdf

(85) 5685846.1

00 91 13

ADDENDA

EAST SHADE SHELTER SHORELINE STABILIZATION PROJECT

Cherry Creek Basin Water Quality Authority P.O. Box 3166

Centennial, Colorado 80161

Addendum No.: 1

Addendum Date: 10/01/2024

The following revisions will be incorporated into the CONTRACT DOCUMENTS, for the above-referenced

PROJECT:

Please see the attached:

• Pre-Bid Meeting Agenda (09/18/2024)

• Pre-Bid Meeting Sign-In Sheet

• Contractor Questions and Responses from the Pre-Bid Meeting

• Revisions to Massive 2 rail fence detail

The BID date is/remains October 18th 2024, 10:00 a.m., MST/MDT

(86) 5685846.1

All other terms and conditions of the CONTRACT DOCUMENTS will remain unchanged. BIDDER must acknowledge receipt of this ADDENDUM in the space provided in the BID. Failure to acknowledge receipt of an ADDENDUM may be cause for rejection of the BID.

END OF SECTION

PRE-BID MEETING AGENDA

1. Introductions/Sign-in sheet

2. Important Dates for the Bid Process

• Question Acceptance Deadline: October 4, 2024

• Bid Intent Deadline: October 16, 2024

• Bid Due Date: October 18, 2024

3. Project Overview

This bank stabilization project was identified as a water quality concern to the

CCBWQA; it is a continuous source of phosphorus into the reservoir and was made worse in the 2023 spring/summer storm events. RESPEC started the design of this project in 2021. CCBWQA and CPW collaborated on this project to restore the eroded bank and reduce the phosphorus loading into the reservoir that we are currently seeing. This project includes bank stabilization with riprap, boulder armoring and grading/revegetation as well as pedestrian access control with fencing and defined access points and stabilized social trails.

4. Estimated Schedule o Contract bid review and selection: October 18th – November 1st o CCBWQA approval for contractor selection (November Board Meeting):

November 22nd, 2024 o NTP Expected in January 2025 with 120-day construction schedule o Construction completion by Memorial Day weekend

5. Required Bid Documents o Unit Price Bid Schedule o Bid E Bond Form

6. Project Area Walk

7. Questions

East Shade Shelter Stabilization Pre-Bid Questions/Responses

1. The width of the post on the massive rail fence it appears larger than standard. Can you confirm the dimensions?

Please see revised massive rail fence detail, confirming the park standard size.

2. What is the water surface elevation of Chery Creek Reservoir

All Cherry Creek Reservoir historic and daily water surface elevations can be found at following website as noted in Section 00 31 32 of the contract documents.

https://dwr.state.co.us/Tools/Stations

3. Does this project require state stormwater and dewatering permits?

Per the contract documents, section 00 73 00, contractor shall obtain state stormwater discharge permit. A groundwater discharge permit is not anticipated but will need to be confirmed by the contractor based on their means and methods.

4. Are modifications to the GESC Plan allowed?

Contractor will be required to coordinate with the Arapahoe GESC inspector during construction. Modifications to the approved GESC will need to be coordinated with the inspector and documented/redlined on the plans. GESC plans are intended to be current

“living” documents that evolved to best protect the site from construction stormwater discharges.

5. Is Holiday/Weekend work allowed?

This will be assessed on a case-by-case basis, however, based on the construction schedule, we don’t anticipate work on holidays between January and May that will be prohibited. All work does need to be completed by Memorial Day weekend. Weekend work is also allowed during this expected work period.

6. What are work hours in the park?

5am to 10pm

7. Can the East Shade Shelter Parking Lot be closed during construction?

Yes only prior to May 1, 2025. After May 1, 2025, no closure to the parking lot is allowed.

8. What types of Boulders are permitted for the project.

Boulders must meet MHFD Specification 31 37 00 RIPRAP, BOULDERS, AND BEDDING

MASSIVE 2 RAIL FENCE SECTION

SCALE: NTS

8'-0" 8'-0"

6"

2' -0

M

IN

5"

5"

NOTES:

1. USE A TOP STRING TO PREVENT A SEE-SAW EFFECT OF FENCE

ON UNEVEN TERRAIN.

2. INSTALL FENCE ALONG TOP OF UNDISTURBED BANK TO BLOCK

PEDESTRIAN ACCESS TO SHORELINE OUTSIDE OF DESIGNATED

STAIRCASES.

STANDARD WRC GIRTH 2 RAIL POST (7"-8" DIA.)

STANDARD WRC GIRTH RAIL (4"-5" DIA.)

GROUND

SUBGRADE

HOLE

COMPACT BACKFILL OR SET IN

CONCRETE IF SITE WARRANTS

CRUSHER FINES HABIT PATH LOCALIZED GRADING PROFILE

SCALE: 1" = 1'

10H:1V LOCALIZED GRADE

4" 6"

4H:1V PREVAILING GRADE

WIDTH VARIES TO TRANSFORM GRADES

STEEPER THAN 10H:1V INTO 10H:1V

WIDTH VARIES

1'

NOTES:

1. FOR HABIT PATHS WITH A PREVAILING SLOPE STEEPER

THAN 10H:1V, A LOCALIZED MAX SLOPE OF 10H:1V IS

REQUIRED TO STABILIZE WITH CRUSHER FINES.

COMPACTED SUBGRADE

CRUSHER FINES HABIT PATH

SUBGRADE

APPROXIMATELY 2' x 2' x 2' BOULDER STEP

CRUSHER FINES HABIT PATH TYPICAL SECTION

SCALE: 1" = 1'

2'

4" 6"

NOTES:

1. TREATMENT OF CRUSHER FINES HABIT PATHS VARY. SEE

SHEETS C-3 TO C-5.

2. CRUSHER FINES SHALL BE USED TO STABILIZE REVISED HABIT

PATHS AND STAIRCASE LANDINGS.

2% MAX

COMPACTED SUBGRADESUBGRADE

CRUSHER FINES

Know what's below.

before you dig.Call

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