Approved boulder retaining wall for hillside drainage fix in Boise subdivision

Focus Engineering's review of the C1.0 site improvement plan finds the stormdrain layout and boulder retaining wall acceptable, with a few keynote clarifications and fence post placement notes.

Sept. 21, 2026 · 2 pages · 97 KB · PDS-Other Small Docs

Engineering plan sheet showing storm drain alignment, sand and grease trap, retaining wall, and footing drain details with grading and construction notes.

Sept. 21, 2026 · 1 page · 736 KB · PDS-Maps and Drawings

Construction notes and grading details for the site, including a boulder retaining wall, storm drain and catch basin, a sand and grease trap, and a 4-foot wrought iron fence.

Sept. 21, 2026 · 1 page · 452 KB · PDS-Maps and Drawings

Cover sheet for the development plans for the Barber Hill Vistas subdivision, with general construction notes referencing city, highway district, water and ISPWC standards.

Aug. 1, 2025 · 1 page · 1.1 MB · PDS-Maps and Drawings

Drawing sheet with drainage details: curb inlets, storm pipe and cleanout details, and sand/grease trap specifications, prepared for a subdivision site.

Aug. 1, 2025 · 1 page · 514 KB · PDS-Maps and Drawings

General construction notes for the drainage improvement plans, covering contractor responsibilities, safety, and conformance with ISPWC and ACHD standards.

Aug. 1, 2025 · 4 pages · 2.9 MB · PDS-Maps and Drawings

Erosion and sediment control plan for a 0.77-acre site disturbance involving regrading of residential lots and construction of a boulder retaining wall, prepared by Nasland Engineering.

Aug. 1, 2025 · 20 pages · 1.0 MB · PDS-Maps and Drawings

Grading and drainage sheet showing spot elevations, retaining walls, swales, pipe runs, a creek inlet and outlet box, and emergency and city access roads.

Aug. 1, 2025 · 1 page · 1.4 MB · PDS-Maps and Drawings

Plan and profile sheet for the storm drain system, showing manholes, pipe runs, inverts, rim elevations and sump notes; references Sheet 10.

Aug. 1, 2025 · 1 page · 666 KB · PDS-Maps and Drawings

Plan and profile drawings with station, curb and grade data for the Barber Hill Vistas subdivision street, dated 7/25/2025.

Aug. 1, 2025 · 5 pages · 3.1 MB · PDS-Maps and Drawings

Set of typical cross-section drawings for the Barber Hill Vistas subdivision, showing grades, walls, swales, ditches and access road profiles at multiple section lines.

Aug. 1, 2025 · 1 page · 418 KB · PDS-Maps and Drawings

Applicant's letter requesting to rebuild a rear rock wall up to 10 feet high on eleven hillside lots to add stormwater controls, disturbing about 0.77 acres with no added impervious area.

Aug. 1, 2025 · 1 page · 208 KB · PDS-Letter of Intent

Guidance for property owners and managers on inspecting, maintaining and disposing of wastes from the site's private stormwater system, with a project description and appendices.

Aug. 1, 2025 · 24 pages · 5.5 MB · PDS-Other Small Docs

Planning staff recommend approval with conditions for rezoning 8.65 acres to R-2D/DA and a 47-lot single-family planned residential development with a preliminary plat.

Aug. 1, 2025 · 337 pages · 28.2 MB · PDS-Project Report/Memo

Planning department letter approving a Category II Hillside and Foothills Development Permit for a retaining wall beside a stormwater pond, based on grading plan findings.

Sept. 11, 2026 · 6 pages · 201 KB · PDS-Action Letter

Administrative approval of a Hillside development permit for a retaining wall beside a stormwater pond, with appeal deadline of Sept. 21, 2026.

Sept. 9, 2026 · 2 pages · 864 KB · PDS-Legal Notice

Category II hillside application for a retaining wall on a single residential lot in the R-2 zone, filed by Biltmore Company LLC.

July 2, 2025 · 2 pages · 197 KB · PDS-Application

Structural calculations for a boulder retaining wall, covering soil properties, overturning and sliding factors of safety, and boulder mass for the Barber Hill Vistas subdivision.

Sept. 21, 2026 · 4 pages · 286 KB · PDS-Other Small Docs

Engineer's letter stating that three boulder retaining walls up to 9 feet tall were built to specification and are acceptable.

Sept. 21, 2026 · 1 page · 96 KB · PDS-Other Small Docs

Engineer's memo asserting existing onsite storm drainage can convey 100-year peak flows without modification, responding to City of Boise flooding concerns.

Sept. 21, 2026 · 8 pages · 3.6 MB · PDS-Other Small Docs

Geotechnical consultant's response to city engineering concerns on retaining wall setbacks, creek conditions, boulder wall design, and fill compaction testing.

Sept. 21, 2026 · 4 pages · 973 KB · PDS-Other Small Docs

Contractor directions from the engineer of work covering liability, safety responsibility, applicable ISPWC and ACHD standards, drainage during construction, and utility location.

Sept. 21, 2026 · 1 page · 2.3 MB · PDS-Other Small Docs

Engineer's stability calculations for a boulder retaining wall in the Barber Hill Vistas Subdivision, covering soil and boulder properties, overturning, sliding and bearing checks by wall height.

Sept. 21, 2026 · 4 pages · 250 KB · PDS-Other Small Docs

Engineering report by Nasland Engineering on drainage for a partially developed subdivision site, covering existing and proposed drainage, peak flow analysis and appendices.

Aug. 1, 2025 · 129 pages · 10.5 MB · PDS-Maps and Drawings

SITE Consulting letter recommending approval of the Nasland Engineering drainage plan (dated 9/9/24) as compliant with prior geotechnical reports.

Aug. 1, 2025 · 2 pages · 193 KB · PDS-Other Small Docs

Two pages of dated site photos showing the existing rock wall on Barber Vista lots 40 to 49 and where it ends near the property line.

Aug. 1, 2025 · 2 pages · 694 KB · PDS-Photos

Public Works staff review of a retaining wall replacement beside a stormwater pond, finding the project compliant with hillside criteria and not hazardous to neighboring properties.

Sept. 8, 2026 · 3 pages · 129 KB · PDS-Agency Comments

Boise Parks and Recreation, reviewed with Community Forestry, has no comments or recommendations on the application.

Sept. 8, 2026 · 1 page · 60 KB · PDS-Agency Comments

Map showing the area within the notice radius for neighboring property owners who were sent notice of the application.

Sept. 9, 2026 · 602 KB · PDS-Maps and Drawings

Checklist answers for the hillside project, indicating earthwork or grading deeper than 12 inches and a retaining wall, with no new parcels, dwellings, or access roads.

Aug. 1, 2025 · 1 page · 693 KB · PDS-Other Small Docs

Aug. 1, 2025 · 53 KB · PDS-Statement of Legal Interest

Aug. 1, 2025 · 99 KB · PDS-Transmittal Agencies

July 25, 2025 · 131 KB · PDS-Receipts