SW3160702_BMP Photos 2.9.23 Carringdon Subdivision_20230210

Photo 1: Carringdon Subdivision — BMP#1— Minimal Permanent Stabilization Provided
Photo 2: Carringdon Subdivision — BMP#1— Wider View Showing Lack of Permanent Stabilization

Photo 3: Carringdon Subdivision — BMP#1— Minimal Permanent Stabilization on Walls.
Photo 4: Carringdon Subdivision — BMP#1— Outlet Structure

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Photo 5: Carringdon Subdivision — BMP#1— Minimal Permanent Stabilization
PhotO 6: Carringdon Subdivision — BMP#1— Minimal Permanent Stabilization

Photo 7: Carringdon Subdivision — BMP#1— Riser Wiers: NOTE: Drawing Sheet C-910, BMP 1 Detail, called for a T-
Shaped Weir, 1.5 ft wide x 3.2 ft tall plus a 1 ft x 4 ft top weir, totaling 8.8 ft2. Instead, two, approximately 18 inch by 25
inch weirs were provided, totaling 6.25 ft2.

Photo 8: Carringdon Subdivision — BMP#1— Erosion Rills Starting to Form

Photo 9: Carringdon Subdivision — BMP#1— Walls with No Permanent Stabilization

Photo 10: Carringdon Subdivision — BMP#1— Walls with Minimal Permanent Stabilization, Plus Rip Rap Falling Apart

Photo 11: Carringdon Subdivision — BMP#1— Rip Rap Falling Apart. Lack of a Lining near Bottom.

Photo 12: Carringdon Subdivision — BMP#1— Rip Rap installed mostly above ground, rather than level with ground.

Photo 13: Carringdon Subdivision — BMP#2 — Negligible Permanent Stabilization

Photo 14: Carringdon Subdivision — BMP#2 — Outlet Structure. NOTE: Drawing Sheet C-911, Issued 6-7-16, Called for
two T-Shaped Weirs, 3 feet wide by 2 feet tall, plus two 4 ft x 1 ft weir sections at the top, with a total surface area of 20
square feet. Instead, two 4 ft x 3 foot weirs were provided, with a total surface area of 24 square feet.

Photo 15: Carringdon Subdivision — BMP#2- Minimal Permanent Stabilization Provided for Basin Walls

Photo 16: Carringdon Subdivision — BMP#2 — Permanent Stabilization provide for flat area of basin, but not walls.

Photo 17: Carringdon Subdivision — BMP#2 — Outlet Showing Erosion and Minimal Energy Dissipation Provided

Photo 18: Carringdon Subdivision — BMP#2 — One of the Inlets to BMP#2 containing substantial sediment

Photo 19: Carringdon Subdivision — BMP#2 — Minimal Permanent Stabilization Provided for Walls

Photo 20: Carringdon Subdivision — BMP#3 — Minimal Permanent Stabilization

Photo 21: Carringdon Subdivision — BMP#3 — Minimal Permanent Stabilization

Photo 22: Carringdon Subdivision — BMP#3 — Lack of Permanent Stabilization Provided on Crest