Project Information

Bid Title

City of Alton-Recreation Center Energy Efficiency Retrofit-Addendum No. 1

Issuing Agency

Alton city

Location

Texas

Published Date

Mar 3, 2026

Closing Date

Mar 11, 2026

Government Level

State & Local

Status

Closed

Original Source

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Project Description

Description	Opening Date/Time	Closing Date/Time
City of Alton-Recreation Center Energy Efficiency Retrofit-Addendum No. 1	February 13, 2026 8:00 AM	March 11, 2026 3:00 PM

Attachment Preview

Addendum Number 1

To:

From:

Email:

Subject:

Bidders

Leroy Martinez, PE

lmartinez@halff.com

Addendum No. 1

Date:

AVO:

Project:

2/27/2026

60585.001

Alton Recreation Center

The following is a list of changes made to the plans and specifications. The changes are outlined by item

number, as well as plan sheet number.

GENERAL

ITEM 1. Building will not have a building automation system (BAS). All units are to function with stand-

alone controls

DRAWINGS

ITEM 1. M1.01

a. Removed Existing CO2 monitors from drawings

ITEM 2. M2.01

a. Multi-Zone Split DX Unit Schedule Updated

ITEM 3. M3.01

a. Detail 3 Updated

ITEM 4. M4.01

a. Control Sheet Updated

ITEM 5. M4.02

a. Control Sheet Updated

ITEM 6. M4.03

a. Control Sheet Updated

ITEM 7. M4.04

a. Control Sheet Updated

ITEM 8. M4.05

a. Control Sheet Updated

Attachments: Document outlined in narrative

2

KEY NOTES:

GENERAL NOTES:

01 MECHANICAL PLAN

SCALE: 1/8" = 1'-0"

Project No.:

Issued:

Drawn By:

Checked By:

Scale:

Sheet Title

60585.001

10-03-2025

MH

LM

AS NOTED

MECHANICAL HVAC PLAN

M1.01

Sheet Number

˚

˚

˚

˚

˚

˚

˚

SINGLE ZONE VAV PACKAGED DX ROOFTOP UNIT SCHEDULE (ALTERNATE BID #2)

˚

˚

˚

˚

˚

˚

˚

MULTI-ZONE SPLIT DX UNIT SCHEDULE (ALTERNATE BID #1)

SINGLE ZONE VAV PACKAGED DX ROOFTOP UNIT SCHEDULE (ALTERNATE BID #3)

˚

˚

˚

˚

˚

˚

˚

Project No.:

Issued:

Drawn By:

Checked By:

Scale:

Sheet Title

60585.001

10-03-2025

MH

LM

AS NOTED

MECHANICAL SCHEDULES I

M2.01

Sheet Number

09 NTAKE HOOD

N.T.S.

06 03 CONDENSING UNIT MOUNTING DETAIL

N.T.S.

SUSPENDED AIR HANLDING UNIT

N.T.S.

NOTES:

10 OFFSET CURB ADAPTER

N.T.S.

NOTES:

08 EQUIPMENT PAD DETAIL

N.T.S.

ALUMINUM JACKETING ON

07 EXPOSED PIPING

N.T.S.

05 ROOF TOP UNIT MOUNTING DETAIL

N.T.S.

LOW VELOCITY DUCT

WITH ACOUSTICAL LINING

RECTANGULAR TO ROUND

CONNECTION OR ROUND

REDUCER AS SHOWN

SUPPLY AIR MAIN

02 VAV BOX SUSPENSION

N.T.S.

VAV BOX

INTERNALLY INSULATED

PROVIDE METAL

LINER IF SPECIFIED

MIN. 3 DUCT DIA.

RIGID DUCT

MATCH ROUND TO INLET

UL LISTED FLEX CONNECTION

MECHANICALLY

FASTEN AND SEAL

DUCT CONNECTION

04 VAV BOX CONNECTION

N.T.S.

01 FLEXIBLE CONNECTION

N.T.S.

Project No.:

Issued:

Drawn By:

Checked By:

Scale:

Sheet Title

60585.001

10-03-2025

MH

LM

AS NOTED

MECHANICAL DETAILS

M3.01

Sheet Number

Commodity Codes

• NAICS 238210Electrical Contractors and Other Wiring Installation Contractors
• NAICS 541330Engineering Services
• NAICS 541690Other Scientific and Technical Consulting Services

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