Meetings
 


City of Helena, Montana
 
June 18, 2015
To: Ron Alles, City Manager
From:

Ryan Leland, City Engineer

Randall Camp, Director of Public Works
Subject: Consider amending the approved conditions for enlargement of the water and wastewater service area for Parcel #1, Tract B, being a portion of the Hawkey Lode Mining Claim and Parcel #2, Government Lot 4, ME No. 4335, and Government Lot 5, ME No. 3562 being Placer Mining Claims.
Present Situation:

The above referenced property is generally located at the end of Chaucer Street with Iowa and Rhode Island streets dead ending into the property.  The City Commission on May 9, 2011 approved, with conditions, the enlargement of the water and wastewater service area to include this parcel for a single family residence.  The conditions of approval were; to loop a water main to provide fire flows and water quality, and extend the sewer main from the manhole in Iowa Street to the edge of the property.

 

In the previous request the property was located in the Hale Water Pressure Zone, which would have required a looped main plus an individual booster pump in order to provide enough flow and pressure to serve the residence.  Since that time, with other development in the area, the City has changed the pressure zone to the Winne Water Pressure Zone which increase both fire flow and pressure. 
Background Information: The applicant, Paula Theide, is requesting to remove the condition to loop the 8” water main from the approval based on the new pressure zone.  She is requesting to allow a single dead end main from Iowa Street to the property near a future residence.  The calculated fire flow to a hydrant near the proposed house will be just under the City required 1750 gpm. 
Proposal/Objective: The applicant, Paula Theide, is requesting to remove the condition to loop the 8” water main from the approval based on the new pressure zone.  She is requesting to allow a single dead end main from Iowa Street to the property near a future residence.  The calculated fire flow to a hydrant near the proposed house will be just under the City required 1750 gpm. 
Advantage: This will allow for the additional of a single family residence on a city lot.
Notable Energy Impact: N/A
Disadvantage: This will perpetuate and increase a dead end water main. Industry standards and good practice is to loop all water mains.  The looped mains provide for better fire flows and water quality.
Notice of Public Hearing: N/A
Staff Recommendation:
 
ATTACHMENTS:
Site Map
Vicinity Map
Request