935 evalena road planning commission staff report - page 2

935 Evalena Road Project File ZR2015-014, Location and Extent Planning Commission Staff Report - of 16

C. Project Description The property owner, Promenade at Castle Rock Metropolitan District No. 2, is requesting approval of an L & E application for the construction of a regional stormwater detention facility at 935 Evalena Road. The project includes two detention ponds on two parcels zoned Agricultural One (A1). The Promenade at Castle Rock is in the process of purchasing a portion of the Grace Chapel property for the proposed project. The proposed stormwater ponds have a footprint of 2.72 acres and a volume of 15.23 acre-feet. The two ponds will treat and detain captured stormwater runoff before releasing runoff to an existing downstream culvert that conveys drainage under I-25. Construction is scheduled for July 2015 to September 2015. During construction it is estimated that 15 vehicles will be on site per day. Pond improvements include a micropool, trash rack and orifice plate, outlet structure, and overflow spillway. The operation of the facility does not require mechanical equipment. The ponds will each include 12-foot maintenance paths to provide access to the bottom of the basin and access to the outlet structures and micropools. The ponds will be reseeded with native seed. After construction, no significant traffic is expected, with only 1-2 trips per month for maintenance and any required repairs.

III. CONTEXT

A. Background This proposed regional detention facility is immediately upstream of an existing stormwater culvert that conveys drainage under I-25. The applicant has indicated that this proposed facility is in general conformance with the Phase III Drainage Report for Grace Chapel detention facility, prepared for the Town of Castle Rock. An L & E for a detention pond north of the site was approved by the Planning Commission in February 2015. This detention pond was also proposed as a regional detention facility to serve the Promenade of Castle Rock development on the west side of I-25.

B. Adjacent Land Uses and Zoning The following table reflects those zone districts and land uses directly surrounding the proposal.

Zoning Land Use NORTH Agricultural One (A1) Vacant; Previously-approved regional

detention facility for Pomenade at Castle Rock, 4233 Home Street

SOUTH Suburban Residential (SR) Silver Heights single-family residential EAST Agricultural One (A1)

Suburban Residential (SR) Silver Heights Water and Sanitation District; Silver Heights single-family residential

WEST I-25; Town of Castle Rock Commercial development within the Town of Castle Rock

IV. PHYSICAL SITE CHARACTERISTICS

A. Site Characteristics and Constraints

The 2.72-acre regional detention facility is located primarily on the southern 2.55-acre parcel owned by the Promenade at Castle Rock LLC. The Promenade at Castle Rock Metropolitan District is in the process of purchasing a portion of the Grace Chapel


property. The property boundary shown on the exhibit may be redrawn to accommodate the necessary setbacks for the church parking lot and building. No existing conditions on the property constrain installation of the new regional detention facility. The Promenade at Castle Rock LLC will transfer the property to the Promenade at Castle Rock Metropolitan District at a future date.

B. Access

The site will be accessed by an existing paved access drive off of Evalena Drive as well as a proposed access drive between the two detention ponds from Harvey Street. Also proposed are 12-foot wide maintenance paths for access to the bottom of each of the ponds and access to the outlet structures and micropools.

C. Drainage and Erosion Control

A Phase III Drainage Report was submitted to Engineering Services for review and acceptance. The Phase III Drainage Report, a Grading Erosion Sediment Control (GESC) plan and report, and construction plans must be accepted by Engineering Services prior to permits being issued for the proposed improvements.

V. PROVISION OF SERVICES

A. Fire Protection The Castle Rock Fire and Rescue Department provides firefighting and emergency medical services to the site. As of the writing of the staff report, no response had been received from Castle Rock Fire and Rescue Department.

B. Sheriff Services The Douglas County Sheriff’s Office (DCSO) provides emergency services to the site. DCSO provided a “no comment” response on the application. At the writing of the staff report, no response had been received from the Office of Emergency Management, the DCSO Hazmat, or the DSCO E911.

C. Water and Sanitation The proposed regional detention facility does not require any water or sewer services.

D. Utilities Referrals were sent to the utility service providers, CenturyLink (telephone), Black Hills Energy (gas), Intermountain Rural Electric Association (IREA) (electric), and Silver Heights Water and Sanitation District. IREA provided a referral response indicating that existing utilities are located within the project area and that an additional 15-foot easement will be needed for underground electric feeders to service the Promenade development. The applicant will work directly with IREA to provide the necessary easements, which will be dedicated by separate instrument. No response from CenturyLink or the Silver Heights Water and Sanitation District had been received at the writing of this staff report.


VI. OTHER PROCESSES AND PERMITS In addition to L & E approval, the following permits and approvals are required prior to commencement of construction:

· A Phase III Drainage Report, Grading Erosion Sediment Control (GESC) plan, GESC report, and construction plans must be finally accepted by Engineering Services prior to permits being issued for the proposed improvements.

· A backup drainage easement to be dedicated to Douglas County is needed for pond access and maintenance.

VII. PUBLIC NOTICE AND INPUT

Courtesy notices of an application in process were sent to adjacent property owners. At the preparation of the staff report, no comments or concerns in response to courtesy notices had been received. Referral responses were sent to required referral agencies on April 24, 2015. Referral responses are due at the conclusion of the referral period on May 8, 2015 or prior to the Planning Commission hearing. Agency responses that have been received to date are included as an attachment to this staff report. Any additional responses received after the date of this staff report will be provided to the Planning Commission prior to the hearing and added to the project record.

VIII. STAFF ASSESSMENT

Staff has evaluated all of the information above, the plan exhibit, referral comments, and public input. In staff’s assessment, the L & E request may be approved, as subject to additional information that may be presented at the Planning Commission hearing.

Attachments page Douglas County Land Use Application ........................................................................................... 6 Location and Extent Narrative and Report ..................................................................................... 7 Zoning and Vicinity Map .................................................................................................................. 9 Aerial Map ..................................................................................................................................... 10 Referral Agency Response Report ............................................................................................... 11 Referral Agency Responses ......................................................................................................... 14 Location and Extent Plan Exhibit .................................................................................................. 16


N INTERSTATE 25E ALLEN ST

N US HIGHWAY 85

MEADOWS PKWY

FRONT ST

HARVEY ST

EVALENA RD

L ARIAT DR

N ALLEN ST

CASTLE PINES DR SOU

TH

BETT

Y ST

HIGHWAY 85 BARR ANCA DR

PA

WNEE TRL

CASTLEGATE DR WEST

LIMELIGHT AVE

SAPPHIRE POINTE BLVD

LEMANS CTC OLLINS S T

C A NYON LN

A TRIUM DR

LORRAWAY

DR

RU

BY TRUST DR

BREW

ER C

T

METZLER DR

SAPPHIRE DR

GA LAX Y DR

R

E ID T RL

FACTORY SHOPS BLVD

AR G OSY WAY

FOUNDERS PKWY

W ALLEN ST

GENOA WAY

ALEXANDER PL

TRE MOLIT

E DRRE

D PA

SS LN

NOVA PL

ATRIUM LN

N INTERSTATE 25

935 Evalena RoadLocation & Exent

ZR2015-014ZONING & VICINITY MAP

Path: O:\Planning\CZeiler\GIS\MXDs\15.05.01_Carol Kuhn_ZR2015-014_935 Evalena Road_L&E_Map.mxd 5/1/2015 2:55:38 PM

May 2015Douglas CountyDepartment of

Community Development

0 970 1,940 2,910485Feet

LegendProject Site

RoadsMajor RoadsOther Roads

Zone DistrictsA1 - AGRICULTURAL ONELRR - LARGE RURAL RESIDENTIALRR - RURAL RESIDENTIALER - ESTATE RESIDENTIALLSB - LIMITED SERVICE BUSINESSB - BUSINESSC - COMMERCIALLI - LIGHT INDUSTRIALGI - GENERAL INDUSTRIALZONED OPEN SPACE CONSERVATIONNF -NATIONAL FORESTCMTY - SEDALIA COMMUNITYSUBURBAN RESIDENTIALD - SEDALIA DOWNTOWNMI - SEDALIA MIXED INDUSTRIALPLANNED DEVELOPMENTINCORPORATED AREAS

Ü


N INTERSTATE 25 HARVEY ST

BETT

Y ST

N ALLEN ST

EVALENA RD

HOME ST

WELLS ST

COLLIN S S T

N INTERSTATE 25

935 Evalena RoadLocation & Extent

ZR2015-014AERIAL MAP

Path: O:\Planning\CZeiler\GIS\MXDs\15.05.01_Carol Kuhn_ZR2015-014_935 Evalena Road_L&E_Map.mxd 5/1/2015 2:30:29 PM

May 2015Douglas CountyDepartment of

Community Development

0 200 400 600100Feet

LegendProject Site

RoadsMajor RoadsOther Roads

Ü


Referral Agency Response Report Page 1 of 3 Project Name: 935 Evalena Drive Project File #: ZR2015-014 Date Sent: 04/24//2015 Date Due: 05/08/2015

Agency Rec’d Agency Response Response Resolution AT&T Long Distance - ROW 04/29/2015 Received. No comment. No response necessary

Addressing Analyst 04/28/2015 Although only a reference, please remove "east" from Harvey Street.

The street name will be corrected with the resubmittal.

Black Hills Energy (Aquila) 04/27/2015 Received. No comment. No response necessary

Building Services Awaiting referral response

Castle Pines Homes Association

Awaiting referral response

Castle Rock Fire and Rescue Dept


CenturyLink Awaiting referral response

Cherry Creek Basin Water Quality Authority


City of Castle Pines Awaiting referral response

Colorado Department Of Transportation CDOT-Region # 1


Comcast Awaiting referral response

E-470 Public Highway Authority


Engineering Services Awaiting referral response

Happy Canyon HOA Awaiting referral response


IREA 05/04/2015 Received. Verbatim response: The

Association has reviewed the contents in the above-referenced referral response packet. We reviewed the project for maintaining our existing facilities, utility easements, electric loading, and service requirements. We are advising you of the following concerns and comments: The Association has existing underground/overhead electric facilities on the subject property. The Association will maintain these existing utility easements and facilities unless otherwise requested by the applicant to modify them under the Association's current extension policies. The Association is requesting a fifteen-foot (15') utility easement to accommodate the installation of electric facilities in this project, and the relocation of existing overhead electric facilities. Also, IREA submitted a redlined set of plans which indicated a need for a 15-foot easement for underground feeders to serve the Promenade development.

The applicant will work directly with the association to determine the location of any necessary easements, which will be recorded by separate instrument.

Office of Emergency Management


Sheriff's Office 04/28/2015 No Comment: No response necessary

Sheriff's Office E911 Awaiting referral response

Sheriff's Office Hazmat Team


Silver Heights Water & San District


Town of Castle Rock Awaiting referral response


Urban Drainage & Flood Control District - Floodplain

05/04/2015 Received. See attached letter for detail. Summary of response: Development not MEP eligible.

No response necessary

Xcel Energy-Right Of Way & Permits

Awaiting referral response No response necessary


UDFCD Maintenance Eligibility Program Referral Review Comments Project: Grace Chapel Pond/Promenade at Castle Rock This letter is in response to your request for our comments concerning the referenced project. We appreciate the opportunity to review this proposal. We have reviewed this proposal only as it relates to major drainage features. We have the following comments to offer:

1. We have no objection to the concept. 2. UDFCD supports regional detention. 3. This development is located outside of the UDFCD boundary, therefore it is not eligible

for inclusion within the Maintenance Eligibility Program (MEP).

Please feel free to contact me with any questions or concerns. Thank you, Mike S. Mike Sarmento, SET Senior Construction Manager Floodplain Management Program Urban Drainage and Flood Control District



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REQUEST 15' IREA EASEMENT

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EASEMENT REQUEST FOR UNDERGROUND ELECTRIC FEEDERS - BACKBONE INTO PROMENADE DEVELOPMENT

935 evalena road planning commission staff report - page 2

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