Historic Review Board - July 9, 2026

Agenda

1. CALL TO ORDER
2. PUBLIC COMMENT
   This is an opportunity for attendees to provide comment to an item that is not on the agenda.

3. PROJECT PRESENTATION

   1. Z0193-26 – For the 160 sqft shed on the SW corner of 2 acre parcel that contains the Mark Prairie Schoolhouse.
   2. Z0195-26 – For the enclosure of the existing carport to convert it to a garage for the Isabelle Rupert House. And
   3. Z0501-25 – For the demolition of the existing office building that was converted from the Supervisor’s home to offices in the 1950s and added onto in the late 1980s. The Oregon Department of Fish and Wildlife proposes to replace the existing structure with a new office building structure in the same location on the fish hatchery site.

   Staff contact: Joy Fields; JFields@clackamas.us; 503-742-4510

4. OTHER BUSINESS 
5. UPCOMING REVIEWS
6. ADJOURN 

‡ Attachments

Z0193-26 Staff Recommendation

This document represents the Staff Recommendation on a Land Use Application requesting the review of a proposed storage building.

SECTION 1 – SUMMARY

DATE: June 25, 2026

CASE FILE NO.: Z0193-26

STAFF CONTACT: Joy Fields, jfields@clackamas.us; (503) 742-4510

LOCATION and Tax Lot: 7528 S MARK RD. Tax Map 41E20, Tax Lot 0400.

Applicant: Mark Prairie Historical Society

Owner of Property: Mark Prairie Historical Society

Zoning: Exclusive Farm Use (EFU and Historic Landmark;

CITIZENS PLANNING ORGANIZATION: None

PROPOSAL: The applicants propose to build a 160 sqft shed on the SW corner of 2 acre parcel that contains the Mark Prairie Schoolhouse.

APPLICABLE APPROVAL CRITERIA: This application is subject to Clackamas County Zoning and Development Ordinance (ZDO) Sections(s) 202, 401, 707.01, 707.02, 707.04, 707.05, 707.06 and 1307.

Location map

Site Plans

Proposed Elevations

BACKGROUND:

Excerpt from 1997 land use file, Z1727-97, that resulted in the designated of the site as a local Historic Landmark through Board Order No. 98-27: “The Marks Prairie School and Monument are set back from the road on a level site that is covered with mature Oak trees. The area is primarily in agricultural use. The school house, built c. 1900 is composed of a single rectangular volume with lap siding and cornerboards with rake boards and frieze. The Mark Prairie School and monument are significant as a fine example of a turn of the century school house and for its association with the Mark family and the Mark Prairie Community.”

The historic structure had one of the mature trees fall on the roof and the restoration effort was approved by the Historic Review Board through land use file Z0522-21. The completed work has received awards and recognition from historic preservation groups in Oregon.

The proposal is to add a small, detached storage shed on the property. The addition of the structure is considered new construction on the historic landmark and is being reviewed for compliance with the zoning requirements.

Site Description: Located on the south side of Mark Rd on a flat lot with mature deciduous trees. The aerial image below has the contour lines in white and is oriented from Mark Road so the top is south:

DISCUSSION AND RECOMMENDATION:

The Planning and Zoning Staff finds that, based on the findings below, the subject site is eligible for the modification of the pool house design, although conditions of approval may be needed.

Applicable Criteria And Findings: Sections 707.01, 707.04, 707.05, and 707.06(C) provide the criteria used to determine how the Historic Preservation Overlay zone are applied to Historic Landmarks. Section 1307 provides the process by which the application is reviewed.

Section 707.02 APPLICABILITY

A. Section 707 applies to designated Historic Landmarks, Historic Districts, and Historic Corridors

Finding: The whole property at 7528 S MARK RD, Canby, 97013 is designated as a local historic landmark. This criterion is met.

Section 707.04 Uses Permitted

A. Primary Uses: A Historic Landmark or properties within a Historic District or Historic Corridor may be used for any use which is allowed in the underlying zoning district, including home occupations, provided such use is not detrimental to the preservation of the historic resource, subject to the specific requirements for the use, and all other requirements of Section 707.

Finding: The use of the subject property for a community center and Historic schoolhouse pre-dates the EFU zoning and the addition of a detached accessory structure does not change the use of the property. This criterion is met.

Section 707.05 Historic Review Board

A Historic Review Board shall be established pursuant to Subsection 1307.03 and shall have the following responsibilities:

C. Review and make recommendations on all proposed new construction within a Historic District or Corridor, or on property on which a Historic Landmark is located, subject to Subsection 707.06;

Finding: Adding structures, such as the small storage shed structure, is considered new construction because it does not yet exist on the site. Thus, the Historic Review Board is reviewing and providing recommendations to staff regarding Z0193-26. This criterion is met.

707.06 THE REVIEW PROCESS

Section 707.06. C 4. New Construction: Applications for proposed structures on a Historic Landmark site, or within a Historic District or Historic Corridor shall be reviewed as Type II applications pursuant to Section 1307. Approval of an application shall be subject to the following criteria:

a. The design of the proposed structure is compatible with the design of the landmark building(s) on the site or in the district or corridor considering scale, style, height, and architectural detail, materials, and colors.

Finding: The proposed storage shed is considered new construction. The scale, height, shed roof, board and cedar lap siding, and color are compatible with the historic character of the site and the Mark Prairie Schoolhouse. As the applicant states in the application:

“The shed will have a concrete floor and entry ramp, cedar lap siding to match the 1879 Schoolhouse, a 3:12 shed roof with corrugated metal roofing to match the decommissioned c1930, WPA-built outhouse and c2000 pumphouse.

Staff find that because the design of the historic schoolhouse was considered and the shed is a similar size and location to the other accessory structures, the storage shed is compatible with the design of the historic landmark. This criterion is met.

b. The location and orientation of the new structure on the site is consistent with the typical location and orientation of similar structures on the site or within the district or corridor, considering setbacks, distances between structures, location of entrances, and similar siting considerations.

Finding: The applicant describes the location as:

“The shed will be located in the back corner of the property, visually placed behind the primary schoolhouse, and aligned with the circa-1930s WPA-built, decommissioned outhouse along the west property line and the circca-2000 pump house along the south property line. It will be sited with the entry doors facing the rear corner of the Schoolhouse and set back the required 10 feet from south and west property lines. It will be approximately 40 feet from the Schoolhouse and 80 feet from each the outhouse and pump house.”

Therefore, the orientation, location, setbacks, and location of entrances are consistent with the location and orientation of similar accessory structures on subject property and is distanced appropriately from the historic schoolhouse. This criterion is met.

c. Changes to yard areas including planters, fences, ponds, walkways and landscape materials should be compatible with the overall historic setting.

d. Scale of commercial use: Individual permitted uses shall be of a scale appropriate to serve properties surrounding the historic overlay.

Finding: The small scale, of the storage shed will limit the impact to the year areas and reduce the impact from the overall historic setting. There are no changes to the historic structure, proposed in this application.

None of the proposed alterations or new construction change the use of the property and do not change the commercial scale of the use

Therefore, staff find the new construction criterion to be met.

SUMMARY OF FINDINGS AND RECOMMENDATION

The Planning and Zoning Staff finds that the placement of a new 160sqft wooden storage shed on the southwest corner of the property does not compromise the historic integrity of the site and should be allowed on this Clackamas County Historic Landmark. Based on the above analysis of the ordinance standards, staff recommends approval of the storage shed on this property.

Z0195-26 Staff Recommendation

This document represents the Staff Recommendation on a Land Use Application requesting the review of the enclosure of an existing carport.

SECTION 1 – SUMMARY

DATE: June 25, 2026

CASE FILE NO.: Z0195-26

STAFF CONTACT: Joy Fields, jfields@clackamas.us; (503) 742-4510

LOCATION and Tax Lot: 2323 SE CREIGHTON AVE. Tax Map 21E12BC, Tax Lot 04201.

Applicant: Nathan Wellborn

Owner of Property: Nathan & Brandi Wellborn

Zoning: Low Density Residential Use (R-7 and Historic Landmark);

CITIZENS PLANNING ORGANIZATION: Oak Grove- contact@oakgrovecpo.org

PROPOSAL: The applicants propose to enclose an existing carport adjacent to the Isabelle Rupert House.

APPLICABLE APPROVAL CRITERIA: This application is subject to Clackamas County Zoning and Development Ordinance (ZDO) Sections(s) 202, 401, 707.01, 707.02, 707.04,

707.05, 707.06 and 1307.

Location Map

Proposed Materials

Site Plan

Proposed Elevation

Proposed Floor Plan

BACKGROUND:

Excerpt from 2013 land use file, Z0270-13, that resulted in the designated of the site as a local Historic Landmark: “The Isabelle Rupert House is designed in the Vernacular-Colonial Revival Style and is one-and-a-half stories with a clipped gable roof. The original windows are one-over-one elongated double-hung sash with architrave molding. The main entrance has a hip roof supported by slender Doric Columns which are set on concrete bases. It is also noted that a building had been attached to the original structure.”

The application materials indicate that the applicants are requesting to completely enclose the existing carport that is presumed to be the building that “had been attached to the original structure.” The proposal adds no additional footprint to the existing carport.

Site Description: Located on the northwest corner of Creighton Ave and Sarah Ln on a flat lot with mature deciduous trees. As a neighbor provided in support of the application “With the plant growth the carport is barely visible from the street.” See the image below:

DISCUSSION AND RECOMMENDATION:

The Planning and Zoning Staff finds that, based on the findings below, the subject site is eligible for the modification of the carport.

Applicable Criteria And Findings: Sections 707.01, 707.02, 707.04, 707.05, and 707.06 provide the criteria used to determine how the Historic Preservation Overlay zone are applied to Historic Landmarks. Section 1307 provides the process by which the application is reviewed.

Section 707.02 APPLICABILITY

A. Section 707 applies to designated Historic Landmarks, Historic Districts, and Historic Corridors

Finding: The whole property at 2323 SE CREIGHTON AVE, Milwaukie, 97267 is designated as a local historic landmark. This criterion is met.

Section 707.04 Uses Permitted

A. Primary Uses: A Historic Landmark or properties within a Historic District or Historic Corridor may be used for any use which is allowed in the underlying zoning district, including home occupations, provided such use is not detrimental to the preservation of the historic resource, subject to the specific requirements for the use, and all other requirements of Section 707.

Finding: The use of the subject property for residential use and accessory garage is an allowed use in the underlying Urban Low Density Residential R-7 District. This criterion is met.

Section 707.05 Historic Review Board

A Historic Review Board shall be established pursuant to Subsection 1307.03 and shall have the following responsibilities:

C. Review and make recommendations on all proposed new construction within a Historic District or Corridor, or on property on which a Historic Landmark is located, subject to Subsection 707.06;

Finding: Adding or modifying existing structures, such as the carport, is considered a Major alteration to the historic landmark because it is changing an existing structure by adding full walls. Thus, the Historic Review Board is reviewing and providing recommendations to staff regarding Z0195-26. This criterion is met.

707.06 THE REVIEW PROCESS

Section 707.06. C 3. Major Alterations: Major alterations shall be reviewed as Type II applications pursuant to Section 1307. Approval of an application for a major alteration shall be subject to the following criteria for rehabilitation:

a. A property shall be used for its historic purpose or be placed in a new use that requires minimal change to the defining characteristics of the building and its site and environment.

Finding: The proposed enclosure of the existing carport does not change the use or purpose of the Historic Landmark. This criterion is met.

b. The historic character of a property shall be retained and preserved. The removal of historic materials or alteration of features and spaces that characterize a property shall be avoided.

c. Each property shall be recognized as a physical record of its time, place, and use. Changes that create a false sense of historical development, such as adding conjectural features or architectural elements from other buildings, shall not be undertaken.

Finding: The carport is considered an addition to the historic home. The applicant states: “By enclosing the garage we will be able to match the siding to the main house, we plan to make all the siding ourselves, out of wood and not composite materials. As the main house is built from natural materials.”

The proposal includes no changes to the historic structure or the landscaping. The existing partially enclosed carport is not a feature that adds historical significance or characteristics to the property. Although the material the applicant is proposing to use for enclosing the carport is natural, the construction will follow current practices and will not create a false sense of historical development. The applicant is not proposing to add conjectural features or architectural elements from the historic house to the carport. This criterion is met.

d. Most properties change over time; those changes that have acquired historic significance in their own right shall be retained and preserved.

e. Distinctive features, finished, and construction techniques or examples of craftsmanship that characterize a historic property shall be preserved.

f. Deteriorated historic features shall be repaired rather than replaced. Where the severity of deterioration requires replacement of a distinctive feature, the new feature shall match the old in design, color, texture, and other visual qualities and, where possible, materials. Replacement of missing features shall be substantiated by documentary, physical, or pictorial evidence.

Finding: The attached carport was mentioned in the land use file that designated the site as a historic landmark in 2013. There is no indication in the record that the carport has existed on the site for more than 50 years. Thus, staff do not consider the carport to be a structure that has acquired historic significance. There are no distinctive features on the existing carport. The proposal includes no changes to the historic home and thus there will be no impact to distinctive features, finishes, or construction techniques that led to this historic site being designated a historic landmark. There are no changes proposed to the historic features of the home or the site. These criteria are met.

g. Chemical or physical treatments, such as sandblasting, that cause damage to historic materials shall not be used. The surface cleaning of structures, if appropriate, shall be undertaken using the least damaging or gentlest means possible.

h. Significant archeological resources affected by a project shall be protected and preserved. If such resources must be disturbed, mitigation measures shall be undertaken.

i. New additions, exterior alterations, or related new construction shall not destroy historic materials that characterize the property. The new work shall be differentiated from the old and shall be compatible with the massing, size, scale, and architectural features to protect the historic integrity of the property and its environment.

j. New additions and adjacent or related new construction shall be undertaken in such a manner that if removed in the future, the essential form and integrity of the historic property, including historic plant materials, and its environment would be unimpaired.

Finding: The proposal includes no ground disturbance that could impact archeological resources. The proposal includes no physical treatments for cleaning the historic home. The proposed addition is for an attached carport that was considered not contributing to the historic character of the site in the land use file that designated the site as a historic landmark in 2013. If the carport is enclosed and becomes the garage as the applicant proposes, it can be removed in the future without affecting the integrity of the historic property.

Therefore, staff find the major alteration criterion to be met.

SUMMARY OF FINDINGS AND RECOMMENDATION

The Planning and Zoning Staff finds that the enclosure of the carport and conversion of the attached structure to a garage on the eastern corner of the historic structure does not compromise the historic integrity of the site and should be allowed on this Clackamas County Historic Landmark. Based on the above analysis of the ordinance standards, staff recommends approval of the carport enclosure on this property.